[RCSE] Re: Soaring V1 #6653: Just a moment?
On Monday 07 November 2005 01.22, David Nasatir wrote: > What will be the flight behavior consequence of a very long tail moment? Hi, David Two things happen, which has - more or less - the same effect: As the power of the tail is tail arm length times the tail area, you'll get a powerful tail, but due to the long tail arm's weight you will get some inertia effects, too. So when the wing is lifted by a thermal the tail will make the wing pitch up more than with a shorter tail with the same tail volume, as one says (tail arm length, times tail span, times tail chord is tail volume). If the tail area is normal the same will happen, but this time due to the longer tail arm, with its greater inertia, and the higher tail volume! So stabler flight & more powerful elevators, that's the main effect - unless there are tail boom bending/flutter problems :-)! More like a B-52 than a Fighting Falcon ... > I believe it was about 1946 when I first realized that there is often a > substantial distance between the way I envision things and the way they > turn out after I have actuallty built them. It doesn't matter too much > (at least to me) however, as I enjoy the process ... I seem to have been in the same class, as my sketches seldom look like the finished product (I usually do a new sketch afterwards, using the finished product as the model - makes the sketch and model look much more the same). Lately I worked mostly with aluminium and stainless bolts - yeah, not model aircraft, but rigs and other stuff for my small boat ... Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] A tall tale?
Hi, How are your eyes doing? You have to take care when out in the sun, allways :-)! Not much sun here just now - very, very, grey and raining most of the time, in short typical West Coast November weather! There is another factor, that I forgot to factor in, about tall fuselages (usually equals long tails), and that is surface drag. Eventually the tail feathers can be very small, due to the combined effects of tail volume and surface drag, till it is about enough with just the tail boom! Of course, that then has to be movable, maybe pivoted at CG, with the forward hull as counterweight :-)! Or make it like a spine, like some prehistoric flying creature's tail, that can be whipped from side to side! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: John Derstine
On Friday 11 November 2005 16.31, Soaring wrote: > >From what I have been reading in RC Groups John is > still missing. He left for work on Sunday and has not > been seen or heard from since. This message from his > daughter went to the Scale Soaring list yesterday... I still have a few mails in my inbox from John - lest's pray everything is alright! Never met John, but he sure was/is a nice guy! Tord, Sweden RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: LMR motor for Pike Superior
On Monday 14 November 2005 12.37, Jim wrote: > 1) I want to run this plane on 10 cells so as to keep the weight > down. Am I better off running the F12LMR or the F7LMR with 10 > cells? What are the pros and cons? The biggest boost is using Li-Ion power instead, as they weigh much less - get a high-amp-proof Li-Ion pack, a Li-Ion-approved controller (Hackers with BEC are nice) and the smaller motor :-)! Unless it is too light, then by all means the bigger motor - generally, bigger motor = slightly higher efficiency! But higher weight, lower climb, so it isn't sure you win with a bigger motor! Tord PS Aveox with Hacker, rocks :-)! RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 #6696: LMR motor for Pike Superior
On Monday 14 November 2005 16.37, lee wrote: > I personally think that the BEC idea for a ship this size is a bad, bad, > idea. Rethinking, yes, of course! But one of those gizmos that replaces a rx battery saves a lot of weight. And yes, form factors when it comes to Li-Ion packs can make them impossible to use - but check around, there are many brands! Sensorless Hacker controllers are a blessing, after having used AVeox's sensored, 'nuff said :-)! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 #6707 LMR motor for Pike Superior (re using battery + BEC)
On Wednesday 16 November 2005 21.42, Doug wrote: > only see two possible problems here -- 1) how will a voltage > regulator respond if the voltage at the output is slightly higher than > it's normal output voltage? (Hopefully nothing happens.) and 2) is > the normal failure mode of a BEC to fail with the output shorted or > the output open? (Open would be better, and it sounds more likely > thinking about how it works.) Using a diode (not a germanium) lowers the voltage 0.7 V and protects the battery from overcharging! What happens when a BEC fails I've no idea! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1: micro sloper
On Thursday 17 November 2005 21.45, John E wrote: > I've been having a fine time finding micro slopes with my Swyft from Scobie > at Liftworx. www.liftworx.com The plane weighs 4.6 oz. Flies very well! I've played a lot with Scobie's own Swyft - mine is not yet assembled :-(! Tord PS Amazing plane - never toyed with anything like it! RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: foam electric poly glider
Kent is looking " for a first glider/airplane for a friend." I don't know if your friend is able to fly anything yet, but as the very first try, if you live in a flat area, tell him to buy an electric Zagi! When he can handle that other planes, like those recommended by Bill Swingle, comes to mind! A Swyft would work well then, but is beyond the biginnner's building abilities, in my book at least! And though it isn't electric is very easy to launch to amazing heights, with a simple discus-style throw! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 #6723: Great Airshow Footage
On Saturday 19 November 2005 20.49, Jim Deck wrote: > Need a rush? Crank up the volume and look at > http://guyrevel.free.fr/WGP/Haute-Voltige_au_Japon.wmv Amazing, truely amazing! Thanks, Jim! Tord PS The sound of radials is hard to better! RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 #6730: Great Airshow coverage
On Monday 21 November 2005 01.52, Soaring wrote: > what is the aircraft the Russian woman is flying? Su-31 - it says so on the engine cowling! The Hungarian's is an Extra something, I think (as is Patty Flagstaff's). Tord, Sweden RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 #6775 : Trophies
On Saturday 03 December 2005 06.17, Someone wrote: > U, are you REALLY sure you want to give the winners the plague? > > >keep the main trophy the way it is but just give a small non returning > >plague to the 2-5 or 2-3 spots up in front of everone @ Visalia. Well, maybe if you came in 6th? Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 #6775 : Trophies
Isn't plaque also those hard, usually black, deposit you'll get on your teeth? Wouldn't like to give 'em that! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 (Digital SLR's)
On Tuesday 20 December 2005 16.24, Nathan Woods wrote: > Whew! That should do it. Just a few comments: In my younger years I carried about a big camera bag with a lot of SLRs and lenses, but I've become wiser! For close photography a high-resolution, quickstarting digital compact might well take as good photos, like this photo I took with my Konica KD-500 (could have been my G-600 - the latter being an upgraded model of the former): http://foldingkayaks.org/gallery/Leeboard/pict3709?full=1 The pilot is Scobie Putchler, and the plane his own design, the Swyft, and the background Seattle's skyline :-)! For distance photography a semi-pro, long tele, big compact, or whateve you call them, like the Nikon Coolpix 8800, could be a good choice! With long lenses you need tripods, or stabilization of some sort! I also got myself an Olympus C-8080W, but its zoom range is not better than that for the other cameras, mentioned above. Otherwise, having such good manual control is a blessing! Yours, Tord, Sweden RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 ??? (Digital SLR)
On Wednesday 21 December 2005 01.51, Tom Copp wrote: > Canon's S2 IS. There are so many out there. Look at > http://www.dpreview.com/reviews/specs.asp and read the timing specs for = > the camera you're interested in and pay attention to the shot to shot > specs. > Anything over 2 seconds feels like a lifetime and most P&S are that and > longer. Absolutely! That was the reason I choose the Konica KD-500 (later complemented with the upgraded version Konica Minolta G-600), because they're fast starters. Remember also that you need a fast card to get decent speed between the shots - some cameras takes bursts of photos at one go at different settings (that you set yourself), some take decent digital films (good enough for the internet). The Olympus C-8080WZ I later bought, is also a fast starter and is absolutely fantastic indoors, but complex (menus aplenty and 21 buttons to keep track on). For studio work it is perfect and can now be found for a pittance compared to what I paid! Someone here recommended using non-digitals for the occasional photographer, and I would say exactly the reverse! If you plan to shoot a hundred pictures in one go, by all means bring your Leica, Hasselblad or your ol' Nikon, but for a few shots to send to your friends the next day, or just after they left the reunion, it is just mad and practically impossible! And even then, your negative will go through a printer on the way to a paper copy, as no developer uses a manual system nowadays. So your analog picture will be digitalized, adjusted and then printed, no matter what you think about digital technique :-(! B&W is a wee bit different, but even my wet-film friends say you can make fantastic B&W prints with your inkjet printer! But then they scan their negatives, and its all digital again! Cameras using film is at a bottom low, investment-wise, and classic manufacturers like Hasselblad are in dire straights - they were recently bought by a digital back manufacturer, thus you can now buy digital adaptors for your Sinar, Kowa, Mamiya, Rollie and others, branded Hasselblad, even though none of these backs ever were made here in Gothenburg, where all the true Hasselblad factories are! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 Beginner's radio
On Wednesday 21 December 2005 06.51, Norm wrote: > I'd like to hear your opinions on what you think is a good radio system to > get for someone just learning to fly. Something to use with basic electric > trainers, foamie combat wings, and warbirds. > Thanks guys- Norm, I think the thre-channel, single-stick Hitecs are hard to beat. Got one with rechargable batteries and small metal-gear servos - the big HS-300 (et cetera) are not stronger, just bulkier, and break easier! If you are going to do a teacher-pupil-hook-up you have to check that it agrees with your own equipment! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Paging Lyle Smuin!
Anyone got an up-to-date email address to Lyle Smuin, Penticton, BC, Canada? His old address, [EMAIL PROTECTED] does not work - maybe it's a problem with telus.net? Tord, Sweden RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] Majestic 110" RES from Laser Arts
On Friday 07 January 2005 01.03, Kurt wrote: > >Dan, > > > >Here's a pointer to what I did to my Laser Arts wings for strengthening. > > > >http://www.ppssrc.com/carbonwing/carbonwing.html (snip) > If I were building a woody that required some additional strength > to a wing I would put carbon on the bottoms of both upper and lower spars. > The reasons are this, first, carbon fiber is stronger under tension and > not compression. Doesn't really help to put it on the bottom of the upper spar, as it will still be in compression - the entire top spar is! Easier to sand the top of the spar smooth, though, if the carbon is on the bottom ... If you add carbon it should be twice as thick on top spar than on the bottom, due to its lower compression strength. That's how Lancair does it, too! A thin aluminium rectangular spar, of soft aluminium, is, on the other hand, very strong in compression and could well be -after it surface has been roughened with a heavy file, or similar, be glued to a wooden spar with epoxy, and held in place with kevlar thread. Soft aluminium have good ageing characteristics, both in tension and compression, while harder qualities have less good in compression, and are harder to roughen as well. > Second I would be concerned of the carbon delaminating if > it was on the upper surface of a spar. The other thing that I'd consider > doing is adding the carbon to the spars prior to assembly. I'd even go as > far as using a vacuum bag to apply enough consistent pressure along the > entire surface of the spar & carbon. I have no arguments against this - sound advice as usual! Yours, Tord PS Glad to be back after a while doing other things :-)! RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Experiments with FMS
Hi, The weather being what it is, and suffering from pneumonia, I've no choice but to stay at home and at the most play with FMS, this excellent free and powerful flight simulator. By altering the PAR files one can change the behavior of your model - to get a flimsy slowflyer to roar across the sky at 200 mph, or vice versa, but the more interesting is to try to improve your model's flying characteristics, by playing with aspect ratio, chord, stabilisator size, and not least CG. By moving the CG backward one can use smaller stabilisator, but then if flying too slow you run out of stabilisator and elevator, leading to the famous high-speed tuck! Sometimes you can roll inverted to safety, but not always! The one thing that doesn't work as in real life is stall, though. For if your model goes into a stall-like spiral dive (usually happens when you have too small a stabilisator combined with rearward CG) you have to give pro-rudder to get out of it, not counter rudder - which is a wee bit weird. Can anyone explain why? Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: flip my flapjack?
Hi, Lovely idea! Just remember that the props have to be handed, with the tips outside the wing going downward, to get neutral handling left and right! That the props counteracts the wingtip vortices is true, their efficiency is low. The Flapjack prototype had three-blade props, the never flown fighter derivative had four-blade, if I'm remember correctly! The main point is to keep the entire span in the prop flow, so I would consider helicopter rotors :-)! And as always with flying wings remember to keep the Centre of Gravity far forward as the propellers have a huge destabilizing effect. A safe bet is 10-15% of mean chord, as just flying a disc-like glider can be problematical with so small fins! I would go safe and first build a glider that you by trial and error eventually can prove works, then scale that up till a motorized version has a similar wing loading. Remember that a twin-400-powered Zagi with a span of 48" is a handful to handle - you contraption is far smaller! The orginal was famous for its low speed flying characteristics and to be safe I am convinced you version has to have a low wingloading. My guess is using two geared 400s, 8x2400 NIMH cells and a 48-52" span! And build it light and use a symmetrical airfoil, so that trim issues are kept to the minimum! When you get it right I am sure it will fly splendidly! Folding props are almost necessary, as landning it the conventional way will be very tricky! Yours, Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [soaring] [RCSE] T-tails, light tails, ala Genie and LT/S.
On Friday 21 January 2005 22.47, Harley wrote: > I abandoned T-tail designs (except for the Orca twist wing sloper that had > a fixed horizontal stab with no moving elevator) over 25 years ago. > > I agree they certainly do look pretty, but as Tom K just observed, they can > get heavy and can do damage to the fuse in a hard dork. Seems there is one reason to use them, that have been the driving force behind using them on full-scale and models that has not been mentioned here: They are out of harms way if landed off regular landing areas, where tall, sturdy, grass and low bushes can easily rip off a low set stabilsator. Seen it happen more than once with models, and on full-scale it is usually restricted to wear and tear. Also less risk for damage in the hangar, and so on. True cruxiform tails might be the ticket? Where the stabilisator is low set but the bottom half of the fin projects quite a bit downward. lifting the stabilisator from harms way, and the nose digs in better, too! Probably the lightest way, too, as the twisting loads on the tail boom is decreased! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Addendum to Re: [soaring] [RCSE] Sailplanes and Stuff FS Status (slightly off subject)
This is where my kayaking pictures are: www.foldingkayaks.org/gallery/tord/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [soaring] [RCSE] Sailplanes and Stuff FS Status (slightly off subject)
On Monday 24 January 2005 16.13, Mark wrote: > Thanks Guys. I'm in the market for a new digital > camers so I'm clearing out the stull I have > accumulated and don't need. Any suggestions on a > camers? I'm leaning towards a Nikon 8700 or 8800. I scouted the market before buying my second camera, an Olympus C-8080WZ, and it sure had all the things you could want, and a lot more, but it just is too fiddly to be very useful, and its colour rendition leaves a lot to the user, so you'll never get it perfectly tuned for outdoor use. At least I have not managed it, even after having taken a few thousand pictures with it! Indoor it is very good, it just don't like blue skies, I guess! So I tend to rely on my old digital, the Konica KD-500Z, which has a few faults, like a wee bit too strong flash, a little too brightly exposed pictures, so you set it at maximum under exposure. The flash you cover with a bit of tape to soften it - works perfectly! And it starts up very quickly, darn durable, fantastic colours (far beyond the Olympus), and I have taken it paddling, in the Atlantic, without any problems at all! Two batteries was enough power for two weeks paddling. Due to a design quirk it works much better with 128Mb cards than bigger cards, but you can use both SD and Memory Stick, at the same time! As Konica gobbled up Minolta the design was updated, and I now think the flash can be adjusted (not sure) and I think you can change the ASA setting now (not sure). I guess it now can use Memory Stick Pro, too! It is now called Konica Minolta G-530 and it can be bought for about $300 in the US. A steal. It's 6Mb brother G-600 is a bit more expensive, but otherwise comparable. The KD-500 is sometimes still available and is then really, really cheap! At one time a professional photographer wrote to me and asked what camera I used for my nice photos at http://foldingkayaks.org/gallery/tord He was exceptionally impressed by the water reflections, et cetera. He thought I had used a studio camera, or at least a Hasselblad ... I live just a few miles from Hasselblad HQ, so it wasn't so bad a guess :-)! No what I do is underexpose so that I have details in the lightest object, as the eye hates white flats, but accept pitch black shadows. Then in Photoshop, or GIMP (the Linux equivalent) I adjust levels till the output range covers everything, from the lightest to the darkest, and hey, presto, you've got really nice photos! This works a bit when you use the Olympus, but you have to have the white balance set exactly (no fun at all), and the reds and the blues - especially flowers - will never be exactly right, while the cheap Konica is almost always dead on the money! The Olympus takes nice panoramas, is excellent when the weather is overcast, is not a bad DV camcorder (film as long as you card manages), takes superb high resolution, nice B/Ws and really at home in a studio - with video out, remote, et cetera. And you can brag with your 21 (yes, twentyone) buttons to press and the world's most entangled menu system! And the lens is really superb, the lack of a good manual focus isn't! And it sure takes a lot of photos between charging is needed - at least a a few hundred at maximum resolution (8Mb!). So, buck for buck KD-500, (G-530) is a superstar! And the G-600 with 6Mb is not far behind the Olympus, resolution-wise! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
addendum to Addendum to Re: [soaring] [RCSE] Sailplanes and Stuff FS Status (slightly off subject)
The outrigger, visble in many of my photos is actually a flying boat hull. Made entirely out of EPP (thanks, DAW) and is really sturdy! :-)! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [soaring] [RCSE] Batteries and Chargers
On Tuesday 25 January 2005 14.57, Chuck Anderson wrote: > Been using the Sirius Charge for 10 years now on both nicads and nimh > batteries without a single problem. I endorse everything George Joy says > about his equipment. I can only say: Ditto! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] GliderKing down for good.
On Tuesday 25 January 2005 14.57, The Sirius Guy wrote: > Subject: Re: [RCSE] GliderKing down for good. > > Bob, > Sorry to hear this, it will be missed. Drop a line now and then to > let us know you are still around and flying. I too have spent a lot of time at the Gliderking site - sad to see it go. Andy MacDonald's Flying wing site seems to have gone, too! Sigh! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] 555 antenna length
One way to make the antenna a little longer is to add a wider bit at the top, say a copper coin, or something like that. It will also receive a wider spectrum ... Having a very overlong antenna will improve reception, as ham radio guys know, as long as it isn't totally out of phase. Ham guys sometimes use antennas 20 times longer than the usual 1/4 or 1/2 wave, with good effect! Very long antennas tend to be very directive, though! Transmitting is another matter, but widening the top of the antenna widens it's possible transmitting spectrum. Yours, Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: [soaring] Chrysalis 2 Meter
On Friday 28 January 2005 05.41, [EMAIL PROTECTED] wrote: > From: <[EMAIL PROTECTED]> > Subject: Re: [RCSE] Chrysalis 2 Meter > > I built one a few years ago and was very satisfied. > > Things I liked: It's a nice plane - builds easily, all the parts fit and > the wood selection is good. It has more wing area than the average 2 > meter, so it's easier to see, and floats well. The thin section allows for > good penetration as well. > > Things I didn't like: The spoilers - the single servo arrangement did not > work well for me. If I were building another, I'd use a microservo for > each spoiler with a direct linkage. I think the new model (Mark II) has two servos ... Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
soaring@airage.com
On Sunday 30 January 2005 16.32, Mark wrote: > There was a guy here local that had onboard GPS that would transmit voice > down to a handheld receiver giving him altitude and airspeed updates > throughout the flight. Sounds like Piccolario Talk, the German variometer system - no GPS, as far as I know! But you can use a GPS system with downlink at the same time, of course! http://www.tun.ch/d/angebot/index.cfm?cat=Vario%20%26%20GPS&ID=81&start=1 http://www.tun.ch/d/angebot/index.cfm?cat=Vario%20%26%20GPS&ID=257&start=2 Sadly, both the GPS and the Piccolario Talk info is in German! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
soaring@airage.com
On Monday 31 January 2005 15.29, Jim Deck wrote: > OK, if we're going to talk movies, what about the remake of every airplane > modeler's classic, "The Flight of the Phoenix"? Outside of some beautiful > flight shots of the flying boxcar in the opening scenes and the long, drawn > out, CGI enhanced crash scene, this film is but a pale imitation of the > original. Exactly! The only thing better in the remake is that the aircraft is designed to look as it really was made out of bits from the Boxcar, which the better film's didn't! Sadly a waste of money that film is, and the story is blander, as the wise guys in Hollywood decided to drop the "enthic" conflict in the original, as the model airplane designer in that version is ex-German, while everyone else is Anglo-Saxon, and it happens just a few years after the war ... Yours, Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: [soaring] Digest Number 3865
On Wednesday 02 February 2005 16.56, [EMAIL PROTECTED] wrote: > From: John Fruge <[EMAIL PROTECTED]> > Subject: [RCSE] DLG (HGL)info? > > I'm looking for the best bang for the buck DLG (HLG)info. I would like to > get 2. Ine for myself and one for my 11 year old nephew.The less we have to > build the better. The Seeker from Liftworx seems a durable and well designed plane! And it evidently flies well (as can be seen by watching the videos at the site) :-)! http://www.liftworx.com/ Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: [soaring] Lawyers ...
All of us who are interested in military fighters know that both Israeli and South African aeronautical industries cloned the classic Mirage III, into Kfirs and Cheetas, sharing a lot of knowhow in the process. Marcel Dassault was asked by a friend (himself an ex-aircraft designer) what he thought about the much talked about Israeli clones? The elderly gentleman answered smilingly, Rien, what should I think about it? Even if the outline and general aerodynamics are identical, nothing in their planes are the same as in our fighters: Other manufacturers, reverse-engineered many of the systems,as well as they were able to do it, sometimes using very different powerplants, even. And we lost no money, as we were forbidden to export more planes, so?! As long as there is no Dassault logo on them, nor any Dassault-designed system in them I don't have anything to say! A little flattered, maybe, that's all! That many lawyers in the USA are nuts we all know, where-ever we live, as we all are constantly being immersed in American TV soaps, like LA Law, and films, like Rat Race, but, to me, Lockheed's strong arm tactics are just silly! Forcing Don and Joe to scrap their profile model line, just because the company thinks they own the outline, or something?! It is sad that the land of the free is so in the hands of lawyers, that do everything to force the rest of the world to pay. Even to use naturally existing plants and herbs, you have sometimes to pay, as they have been patented in the US! What happens is that US uses strong arm tactics to "free" all of us, forcing us to abide US laws, even though we live in other continents! A lot of legislation here in Sweden has changed during the last decade to conform with US laws, and more is coming! I wonder when US laws will change to conform with Swedish :-)? Remember what happened in Bopal? The place was soon after the catastrophe crammed with US lawyers, who took at least half the money the poor victims were supposed to get! Consequently, many victims never received a cent. And now I'm sure Thailand, Indonesia and Sri Lanka are crammed with these litigating experts, all trying to sue various bodies for not making their restaurants, hotels, boats, cars, countries, and what-nots, Tsunami-proof! Over 500 Swedes died there, so maybe a few Swedish lawyers are there, too? Now back to building my next flying contraption project :-)! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: [soaring] harbor freight vaacum pump, any use?
On Sunday 06 February 2005 15.54, [EMAIL PROTECTED] wrote: > The Harbor Freight store in town has a red, AC powered vacuum pump by > Central Pneumatic on sale for ten bucks, marked down from 15. It's used to > pull vacuum on air conditioning lines prior to adding refrigerant, ad copy > only sez "it will pull a full vacuum within 2 minutes. at 4.2CFM ..." > > It seems very uncomplicated, no mention of a regulator or anything... is > this of any practical use to me should I decide to get into bagging wings > and stuff? Just my gut feeling: Yes, yes, yes! But add a vacuum switch, of course! > If yes, I would probably just buy it now and store it until I > got the urge to try and make bagged wings down the road, but is this type > of unit really any use for our applications, esp. for a raw beginner at > bagging? Or should i wait and maybe buy a complete package later if the > mood strikes? Money is ALWAYS a factor... It will also be perfect if your into building boats - there is no better way than bagging things to get a mirrow finish when you use epoxy. I've seen photos of bars, boats with perfect finish, all thanks to this technique! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] Cutting Ribs CNC style....
On Monday 07 February 2005 05.09, Paul Breed <[EMAIL PROTECTED]> wrote: > I've been cutting some balsa with a small Taig CNC mill > I did a brief writeup. > http://www.rasdoc.com/splinter/RibsCut.htm Wow! That is a lot of work for just one rib! Couldn't a normal plotter be used, if one replaced the pen with a svivelling knife? Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] The muddy field of copying
In my younger years I worked at a famous design department and I assure you that copying goes on all the time. Just as us amateurs borrow details we liked from models we've built before, professional designers do the same. If you're an optics designer you look through lapsed patents to see if there is anything there you could use, if you're designing the rear view mirror of a truck you check what the competition are up to, and steal those ideas you like, in a slightly modified form, and so on. When the Russians stole the general arrangement plans of the Concorde, they realized that their manufacturing skills in all departments were not quite up to the Brits and Frogs level, and besides they were behind time-wise and were ordered to fly first, so they simply used a simplified design, with a few work-arounds - the fuel trimming system of the Concorde was replaced by a highly advanced, retractable, canard with double-slotted flaps, et cetera. And how many models isn't there out there copying the Zagi, or the Lazy Bee? And for scale models there can be very little you can do if someone makes a mold from your model, that in turn is a scaled down copy of the real thing?! As long as the "innards" are different of the resulting model I doubt that anyone can do anything about it! And copying doesn't need to be done as crudely as making a plug out of a commercial kit; you could simply do a 3-D scan of the fuselage and wings and then make your own copy a little bigger, or smaller, just as you like, with little extra work involved! If your scanner is big enough you can scan the full-size aircraft, of course! What one shouldn't do is to copy the mechanical solutions inside the kit, unless they are old and proven. Just as with chip production reverse engineering is perfectly legal, as long as the end result has taken another route to get there! In software this is a problem, as a routine written by someone can easily be stolen as it is, and reused and then compiled into something the original author wouldn't recognise. The type of GUI (Graphic User Interface, like Windows) we all are used to today were originally created by Xerox research teams, but were quickly "stolen" by Apple and Microsoft, to mention a few, while the three-button mouse was originally treated as a hot potato (being a mechanical device) and wasn't "stolen" till later :-)! Still think Lockheed are nuts, period! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] The muddy field of copying
On Thursday 10 February 2005 17.10, you wrote: > >When the Russians stole the general arrangement plans > > of the Concorde > > A more charitable interpretation of this is that both the Russian and the > English/French teams had similar problems to solve with similar tools so > they came up with similar solutions. The legacy of the Cold War is such > that we refuse to admit that the Russians had any signifcant technical > capability -- "they must have stolen it" -- but there's ample evidence to > the contrary. Actually it was Tupolev Jr that said it himself; that they had pretty good general arrangement plans and also detail plans of certain systems, in a very good documentary done a few years back, beginning and ending with the famous flights by NASA-equipped Tu-144 for studies of second generation SSTs. Tupolev also said that the wing planform was too complex for their time schedule, so they opted for a double delta, not unlike the wing of a Saab Draken! That the Tupolev crashed in Paris was definitely caused by the French, and afterwards the Soviet and French authorities cooked up a weird story that it was the fault of one of the Russians aboard, that his film camera had blocked the controls! When they asked the firemen who dug out the remains of the cockpit from a house everyone was in his seat, and nobody had been standing up and there was no film camera either! When they cornered a French official he first kept to the original story, but eventually owed up that it had been a fake story, so to not worsen the relations between the two countries. Nobody thought anything about blaming an innocent man, evidently! It was BBC that made the program. I think. > There's a widely held misunderstanding about what's actually invovled in > creating things that's causing inflated expectations about what an idea is > and how much its worth. Changes in patent and copyright law have reinforced > this, those changes being institued because they suit corporate interests > (IMO). Creating the "form" is often the easy bit. Getting the form into a > realizable state, getting it manufactured, getting it marketed and > delivered to willing customers and supporting it is where the work is. > We're getting lazy -- we expect others to do this for us for peanuts so we > can profit from our genius, complaining loudly to all when people cut us > out as unnecessary (you could call it the real hidden danger in > outsourcing!). Couldn't have said it better myself :-)! Lots of good products never becomes a commercial success because they get those factors wrong. Look at all aircraft projects in the US the last twenty years, where new companies emerge with new, better aircraft, but fail anyway! A handful get it right, and survive, like Lancair and a few others, while heaps never make it: Avtec, Omac The list is very long! A few designs become immortal, like the Taylorcraft, that we see to this day in various forms: J-2, J-3 (Cub), Auster, plus a lot of ultralight copies, while some, like the pretty Beechcraft Starship One, never became a commercial success (today all remaining Starships have been returned to Beechcraft, to avoid litigations). > Martin Usher > > BTW -- LM and the companies that they sold the design "rights" to are > cheeky. We (the taxpayer) have already paid them for this work. The problem > isn't really LM, its the companies that bought the rights with the > expectation of profiting from sub-licencing. Its our duty to make this > business unprofitable otherwise we're be spending the rest of time fighing > off parasitic protection rackets. Hear, hear! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [soaring] [RCSE] Re: Optimum aspect ratio - SF Project
On Friday 18 February 2005 17.12, [EMAIL PROTECTED] wrote: > Generally speaking higher aspect ratio with either a fixed span or area > will equal a reduced wing chord. This will result in reduced reynolds > numbers which equals reduced performance for most all airfoils > *** > > Yes, but also what's happening (for a fixed wing span) is a trade off > between wing loading and induced drag. Re (at least for DLG chords and up) > is a variable but not the dominant one. > I think Martin Simons "Model Airplane Aerodynamics" is a good source for info about this, not least appendix #1! A practical, high AR wing, is by default heavier (if having the same area), than a low AR wing, which makes the gain with a high aspect wing smaller than expected, even though it has lower drag. Also, when talking constant area, and small models, the lower efficiency of small chord wings comes into effect. Also mechanical matters affect the calculations, as narrow wings are more flutter-prone than low AR wings! Thus, as we are talking equal wing area, short wings are light, affecting minimal sink, while good glide ratio, equals low L/D, but the longer they are the faster they have to fly, to maintain good Reynold's numbers! If I remember correctly, your wings were all balsa sheet, thus approximately the same weight no matter what Aspect Ratio they have. The reason that AR about 7 are optimum, is that longer wings have too small AR to be efficient, while shorter have too big induced drag! In the real world high aspect ratio wings are perfect, as long as you can build a strong enough wing, but they will be default be heavy! But if you have a motor the calculation gets more difficult, as a lot of induced drag during take-off and landing, due to short span, can be compensated by brute power. At cruise speed and straight flight long wings are not that helpful, unless the engine can be throttled back efficiently! So a motorglider has very low useful load, but excellent fuel economics! Good luck, Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Error!
Martin Simons book is called Model Aircraft Aerodynamics, nothing else! Sorry, Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Computer crash
Hi friends, This is your friend "The Zagiist" speaking! Recent developement is powering a Zagi THL with a geared 300 motor - not a success as yet, but I haven't given up on it, yet! But now to the subject: I have had a flakey PC for a long while - but after coming home from a short vacation to our capital its Window Milennium Edition system decided to be terminally ill, so no Windows no more! The Linux system is up since yesterday night, and works well, but not fully configured yet (pictures and mpegs are still a bit off), so I lost all mail addresses I had. Please send me a line, so I can rebuild my past mail address index! Yours, on a sunny September afternoon (20.5 degrees C), Tord S Eriksson www.tord.nu RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Joining surgical tubing
The method I have used successfully for a number of years now is simple and as yet without failure (it has seen over ten years of use): Take a piece of rope (I used flag line) about the same diameter as the inner diameter of the surgical rubber tube and wrap tighly the end with coppar wire till it is slightly thicker than before - make sure the ends of the wire are pointing inwards, as not to scratch the rubber tube after insertion. The end should be inserted about an inch into the tube; if it doesn't want to, try wetting it and the end of the tube a bit. Now wrap the tube, with the rope inserted, in a similar way, now ensuring that the ends of the wire points slightly outward ,as not to scratch the tube and the wrap with tape or use a piece of shrink tube. You can this way make rope hoops in the end of the surgical rubber, for tying on a line, or to push the stake through, too, using a slightly thinner line. This method does not work for massive bungees, of course - then I just fold the bungee over and wrap copper wire, or strong line, around. Hope this helps, Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
[RCSE] Fwd: Aerodynamic problem with a Hades
See Martin Simons' Model Aircraft Aerodynamics excellent explanation why a forward CG is the right cure for sailplane tuck under, chapter 12.22: "The main part of the cause is lack of static margin. brought about by having the centre of gravity too far aft. The centre of gravity should be moved forward to improve static stability and the staniliser rigging angle and/or elevator trim readjusted to restore normal balance." "Another very likely cause is structural flexibility." Thus, if the tail boom flexes, if the pushrods flexes, and thw wingsa and control surfaces flexes, you have to add static stability margin for that, thus even further forward with the CG. Tord -- Forwarded Message -- Subject: Aerodynamic problem with a Hades Date: Mon, 31 Mar 2003 16:37:01 +0200 From: Tord Eriksson <[EMAIL PROTECTED]> To: "Randy Bullard" <[EMAIL PROTECTED]> Cc: [EMAIL PROTECTED] Hi, If it wants to tuck you have to move the CG forward - maybe you tried the other way? Just a thought, Tord --- RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
[RCSE] Best vehicle for RC transport
Well, a black Corvette with a articulated trailer sound just swell :-)! I used to use a Saab 900 (the old version) hatch-back, but now a Ford Scorpio (interior dimensions similar, rear wheel drive). 72" wouldn't be a problem with either! A car that really swallows stuff (partly due to the fact that the front passenger seat folds down to make a perfectly flat floor) is the discontinued PT Cruiser! A bit thirsty for European gas prices, but neat! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
[RCSE] Paging Lyn Disbrow
Hi all, Back for just a short while on the list - life has changed a lot since I left you! Anyway, does anyone know what has happened to Lyn - his website is gone, and he doesn't answer emails ... I fear the worst, hope for the best :-)! Tord PS Latest flying model is a four-motor Twinstar II! RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Remember KISS! (was: Re: [RCSE] switch failure)
Nowadays I have a big bright flashing LED in my planes, which helps when I forget to wiggle the sticks! And I don't use no switch no more, but electrically- powered-plane-style banana plugs. Very secure on and off! Big Deans would work, too, I guess :-)! Tord RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
