[RCSE] Video, not soaring
Sorry, not soaring related, but captures the feeling of flying very well: http://www.youtube.com/watch?v=Rk81TsW9Xdg Arne 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] 2.4 install how to?
On Mon, 3 Mar 2008, [EMAIL PROTECTED] wrote: The obvious good location would be in the fin since they are usually fiberglass above the stab. There is a limit to how long the aux reciever extension There was a thread in RCGroups recently that showed how sattellite receivers were mounted at fin and at the wingtips. It would be nice to have a plane with sattellite receivers preinstalled during manufacturing. Like in some high-end planes the wing servos are installed during the molding process. regards, Arne 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] Lithium Ion charging
On Sat, 21 Oct 2006, Martin Usher wrote: Go to Target and buy an inverter for your car that will convert the 12v power to 120volt. Their price varies from $30 to $50. Its better to get a larger than a smaller one (i.e. avoid the 100 watt one, go for a 200 or 400w one). One must be careful with those inverters. The cheap units produce quite dirty AC (i.e. the signal is not sinus but contains lots of higher frequencies too). Impulse PSU-s (like those found in mobile phone or laptop chargers) can live with that. But if you have a PSU that contains large transformer it might cause problems because it overheats. I damaged the transformer of my charger using the cheap inverter. The transformer made chirping noices but I did not understood what's the problem before it went off. It took me more than 10 minutes to open the charger and the transformer was still too hot to touch. Fortunately only the thermo fuse inside the transformer needed replacment. Since the LiPo charging is much simpler process than NiMH charging, there is not much difference between cheap and expensive chargers. So, I would get an entry level 12V dedicated LiPo charger. regards, Arne Martin Usher Bill Swingle wrote: OK, hypothetically here. Say I'm at the slope but my Lithium charger uses only 120V AC. So, if I wanted to be reckless (go with me here), what can be done with a Nicad charger and how? Bill Swingle 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-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-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] Safe transport of planes in planes
Hi! I was reading Bruce Schneiers fresh Crypto-Gram and found a very interesting article about how to transport expensive cameras in planes when the cameras must be checked in. http://www.schneier.com/crypto-gram-0610.html Read the article Expensive Cameras in Checked Luggage. Basically, when you put a small starter pistol into your plane case you can lock it down with non-TSA approved lock and the case gets extra tracked because they do not want to lose a weaponse case. regards, Arne 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] Stopwatch Recommendation
On Tue, 17 Oct 2006, Brian Molloy wrote: I ordered one for handlaunch (use a standard stopwatch for thermal duration), and just received mine in the mail yesterday. Very, very easy to operate. For multiple DHLG flights you only have to hit one button for each landing and relaunch (stores up to 100 flights). You can review this data with another single button even while timing the next flight(s). Which model did you get? There seems to be many different ones. regards, Arne 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] Video
Not very scale flying. But it circles nicely in the thermal :) http://www.flightlevel350.com/Aircraft_Alenia_C-27_Spartan-Airline_Italy_-_Air_Force_Aviation_Video-2178.html Arne 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] LSF discussion
On Wed, 6 Sep 2006, Ben Wilson wrote: mean new people, but also some new ideas - and I'll give an ear to just about anyone who has an idea that might help me put more people in my club and more planes in the air. (Young) people are unaware that such thing as R/C soaring exists. It might be worthwhile to show the cool side of this hobby to masses. Like get one of those nice videos Paul Naton and Dave Reese put out and show it on Discovery or some other appropriate channel. Or make a reality show where 10 beautiful models learn to fly 10 beautiful models. regards, Arne 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] World's Largest Bubble Dancer
Hi! Spotted this in September issue of IEEE Spectrum: http://home.cyber.ee/arne/bd.jpg Arne 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] Wing Failure
Sorry, no glider content - http://media.putfile.com/Wing-Failure Arne 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] World Champs Update
On Thu, 3 Aug 2006, Jim McCarthy wrote: I may have jumped the gun. There should be one more round in junior and senior classes flown tomorrow am. Keep your fingers crossed. Go Juniors!! If you look at the starting lists they have starting lists for 10 rounds for juniors and 11 rounds for seniors. I'm not sure if they are supposed to go through all of them but the weather has been good, so I suppose there will be some more preliminary rounds tomorrow morning. Arne 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] 220 nimh battery source
- Original Message - From: Tom Broeski [EMAIL PROTECTED] Looking for a source for 1/2 AAA nimh HL battery packs Hi Tom! Fellow DLG-er is offering some nice, purpose built packs: http://www.rcgroups.com/forums/showpost.php?p=5586138postcount=1 regards, Arne 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: A FREE PLANE!!! was Re: [RCSE] Beginner sailplane recommendations
On Sat, 27 May 2006, Bill Johns wrote: On May 27, 2006, at 3:00 PM, Jim Laurel wrote: Years ago I would have suggested a Highlander, but they are no more and there don't seem to be any really credible (i.e., decent performing) foamies. Speaking of Highlanders That's what I learned flying a full house plane with. I actually trashed one on a zoom launch into a stiff wind. That's significant because they are nearly indestructible. ;-) Mark is going to make another production run of Highlanders soon. Check out: http://www.rcgroups.com/forums/showthread.php?t=516529 if you want to get one. Arne 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] Re: Soaring V1 #7546
On Fri, 28 Apr 2006, Jeff Thompson wrote: Case in point: A couple of weeks ago I had to replace a compressor for a new Ductless-Split air conditioner (those little rectangular Japanese A/C's like Samsung, Mitsubishi, etc.) Someone had cut the refrigerant lines in order to steal maybe $1 of copper, and the compressor continued to run without being cooled oiled. In short order the compressor burnt out and fouled with very smelly acid. IMO that's what would happen with your window-unit vacuum pump. The situation is little bit different whem you use the compressor for creating vacuum and not just let it run free. If it runs, connected to nowhere (as in your case) it will overheat. If it is connected to vacuum bag it will evacuate all the air very quickly, become quiet and do not overheat. If full vacuum is all you need (like in case of bagging the blue foam) then this compressor will work just fine running continously. If you bleed some air into the sucking side (intentionally in order to reduce the pressure or by leaking bag) then it will become hot and needs cooling fan. Sometimes when I manage to get a perfectly sealed bag the compressor will be just slightly warm after running 24h. It will mist some oil from the outlet side - but not very much. You should make sure that there is oil inside pump. When you turn pump upside down the oil will flow out. If you get new pump you normally do not know how it is handled, so it is best to add some new oil. I used cheapeast mineral oil for 4 stroke gasoline engines. First I added it too much so that pump did not even start. Poured some out until it started and kept like that. regards, Arne 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] RDS pockets
Hi! I'm building RDS for SuperGee wing and would like to know what others have been used for pocket material. I have one wing where I used some countertop material from furniture shop. After one year of heavy usage there is some slop near the neutral and it seems to be in the pocket. I thought to lay up some unidirectional carbon and make the pocket from carbon laminate. But is the carbon good material for bearing surface? I'm little bit worried that it migth wear out. I thought about using thin Mylar to protect the carbon - it would also give very smooth surface. Do you think Mylar would be appropriate in this place? regards, Arne 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] Re: subscribing
On Fri, 17 Mar 2006, D.S. wrote: Thanks for the info Phil. That doesn't work for me either. I did manage My experience with soaring-request@airage.com processor is that it needs a valid command in the first line. I have a habit to start e-mails with few empty lines, so they look better in my mailer and have hard time remembering what to do, every time I need to contact list processor. Arne 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] TX battery - NiCd or NiMH?
Hi! Must get new battery for TX. Current one is down to 500mAh (from 750mAh) and lasts only for 2.5 hours. I can get 1100 mAh NiCd or 1650 mAh NiMH (both Sanyo) at the same price. Which one is better for TX? Arne 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] TX battery - NiCd or NiMH?
On Wed, 8 Mar 2006, Bill Swingle wrote: Each will work fine for the TX. How will you charge it? I have Reflex charger that does peak prediction (same chip that is inside Sirius chargers), but it will only output 650mA max. I've heard that NiMH cells do not like too low charging current and 650mA is almost 1/3C. Do you tend to abbuse your batteries? No. regards, Arne 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] Carbon Supra #48 flies - weight 61 oz !
On Fri, 17 Feb 2006, Michael Neverdosky wrote: I think I got off by a power of ten so things are not as bad as my numbers make it but the idea of checking to see what is really needed so I can use enough wire without just throwing more wire at it is sound. Anybody know the full stall current draw of the popular servos? Google for servomances. According to it maximum current for DS368 is 555 mA. Arne 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 Supra is not SuperPlane!
On Thu, 2 Feb 2006 [EMAIL PROTECTED] wrote: Also there is no town called Krypton in the current Cz Republic, I google it and found nothing. Czech Republic is a nice place and home of many nice planes, but don't take the glory away from Ukrainians. The Supra is manufactured in Ukraina. regards, Arne 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] Re: Polyester and epoxy, how to get them to play nice together?
On Wed, 9 Nov 2005 [EMAIL PROTECTED] wrote: Still looking for some rules of thumb regarding compatibility. Got a 20-year old glass/glassed-wood fuse that, best guess, is polyester, and I may have to do some minor repairs/filling on it here and there. I don't use stinky polyester, the wife would never allow it, only epoxy resin, but, are there potential problems mixing between the two? Small repairs, filling, sanding, repainting. What's the word? Look here: http://www.rcgroups.com/forums/showthread.php?t=431238 It can be done. Arne 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] Retro winch
http://nakotne.com/e107_plugins/kig_menu/index.php?view=imageimageId=795 The engine is from old Russian chainsaw Druzhba (Friendship). regards, Arne 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] Radio pylons?
Hi! How feasible would it be to replace the pylons that are used in F3B and F3F, with automated radio pylons? Are there any projects or attempts in this direction? Quick googling did not give any results. I thought about system where each plane has a transmitter with unique code and at the pylon locations are highly directional receiver antennaes with 3D polars that look like pancakes. When plane flies through the pancake the signal strength peaks and this is signalled back to pilot. What kind of antennae would give this kind of polar? What would be a reasonable maximum working distance for this kind of system? regards, Arne 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] F3B pictures
Hi! I had never seen a F3B competition before and since the WC was held so close I decided that this is a perfect oportunity to see what it is all about. I spent there four days (from Tuesday to Friday) and made more than 1500 pictures. At the end of the second day I learned to use the camera to shoot the planes. Tha camera was Konica Minolta Dimage Z5 - not a SLR, but quite usable if you are careful. It has 12x optical zoom that brings the planes to the shooting range at the last 1/3 of the distance run. It also has progressive and continuous shooting modes that are perfect for capturing the launches. The weather was good most of the time - at least for spectators :) Most of the time, the wind was blowing perpendicular to the winchlines, so the launches were very interesting to watch, with planes turning away right after the launch and going sometimes straight over your head at low height, full winch power. The competition was held on a working airfield, so there were pauses from time-to-time to let the big planes land and take-off. The landing area for the duration task was between winchlines and runaway and almost invisible for spectators. On Friday the wind was blowing along the winchlines and the landing area was moved to the hangar side, so we could see the landings too. Some pictures from the WC are here: http://home.cyber.ee/arne/f3b-album/ (full album in packed form for easier offline browsing - http://home.cyber.ee/arne/f3b-album.zip - 90MB). regards, Arne 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] JR Aerotow
On Tue, 7 Jun 2005, Steve Meyer wrote: How does one make a MOV play at twice the size? A little small at 1280x1024. On Windows Ctrl-2 is double size and Ctrl-3 fills the screen. Arne 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] Graupner servos HELP
On Thu, 12 May 2005, Kent Miller wrote: I have an LET ASW 28 that had one of the servos snap a gear. It is a Graupner C261. I need a set of gears or a replacement servo. A Graupner C121 Graupner C261 is same servo as JR S241. Arne 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] Plug-in wing wiring connectors: good, bad, ugly?
On Tue, 1 Mar 2005, Simon Van Leeuwen wrote: pin/socket designs meant for lots of plugging and unplugging. I can supply PN's if you are rolling your own. Any suggestions for DLG wing connector, where you only need four pins and the light weight is important? regards, Arne PS. I just looked at the specs of ordinary 2.54mm, 2.5mm, 2mm, etc PCB connectors that I planned to use. 25, 30 or maximum 50 mating cycles :( 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] Plug-in wing wiring connectors: good, bad, ugly?
On Tue, 1 Mar 2005, Arne Ansper wrote: Any suggestions for DLG wing connector, where you only need four pins and the light weight is important? I got an idea. Get a pair of sub-D connectors with solder cups, like those here: http://img-europe.electrocomponents.com/largeimages/C447702-01.jpg Cut away the metal shield and cut seven-pin blocks from the connectors. Four pins will be used for ground, power and two servo signals. One pin will be the key pin to avoid reversing the plug. Two pins at the ends of the blocks will be removed and replaced with short steel rods that are glued to the female connector - those rods will carry the mechanical loads. Female connector will be glued into the wing. Steel rods must be thick enough to keep the connector firmly in place. regards, Arne 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] Connector DLG
On Tue, 1 Mar 2005, Simon Van Leeuwen wrote: accomplished with wire-to-board connector systems and similar breakaway headers that are 2mm spacing (Milli Grid); http://www.molex.com/customer.html?supplierPN=50394,51110:87089 They do not list the number of minimal guaranteed mating cycles there. Is this parameter important at all? For all the wire-to-board connectors that had this parameter listed it was from 25 to 50. regards, Arne 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] Source for Inexpensive Mylar?
On Mon, 14 Feb 2005, Jim Prouty wrote: I have a project that will use a lot of mylar and I'd like to find it as inexpensive as possible. Needs to be .014 thick if possible. Check the places that make plastic packages: the folded transparent ones. 1x1.2 meter sheet of polyester film cost me ~ $4. Best regards, Arne 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] Re: [SALglider] Bagging curved wingtips
Hi! On Wed, 9 Feb 2005, Dan Kitching wrote: Maybe I missed an earlier post of yours, but pray tell, what is this mysterious compressor of yours? I'm considering a purchase of a 1/3hp Embraco compressor (refrigerator compressor) to serve double duty as a quiet compressor for my airbrushing and as a vacuum pump for bagging stuff. I can get them here in Canada for $150 brand new. If it'll work, the price is right !!! Mine is also refrigerator compressor. I got it for free from the place that removes freon from the old refrigerators before they scraped. They had pile of compressors there, the one that worked well was fourth that I tried - one had electrical leakage inside, one had air leakage inside, one did not start at all and the fourth was ok. If you can get used units cheaply, but are worried about the reliablity, you can always put a check valve between the pump and bag and run two units in parallel. I think that new refrigerator compressor will work well as a vacuum pump. I do not know nothing about airbrushing. BTW, if you can select your compressor select one that is designed for high starting torque. Those compressors are able to start even when there is partial vacuum on the suction side. The low starting torque compressors will not start when there is vacuum on the suction side and require pressure equalization tubing between suction and pressure sides in real refrigerators. LST compressor can still be used for continous run. Also, there are low back pressure, medium back pressure and high back pressure compressors - I did not completely understand what is the difference. Danfoss has very good documentation on their website. Go to www.danfoss.com, Products, Refrigeration and A/C, Compressors, Hermetic Compressors. Select Literature tab and open the Instruction/User guide hive. Mounting Instructions for Danfoss Compressors is good reading if you are rebuilding old unit - lots of this info applies to all refrigerator compressors. Refrigeration - an Introduction to the Basics will explain how to build your own refrigerator and save even more :) Arne 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] Airtronics 94091Z - is it good?
Hi! Is the Airtronics 94091Z good servo? Numbers look good, but what about gear slop and strength? I would like to use it on the DLG rudder and elevator. Arne 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] Sanding Mylar LE?
On Mon, 24 Jan 2005 [EMAIL PROTECTED] wrote: Somewhere out there on one of the groups, there was a discussion of sanding mylars at the LE for vacuum bagging to help it conform better to the LE radius. Original post from SALglider list by Mark Drela: From [EMAIL PROTECTED] Fri Jul 23 12:51:06 2004 Date: Fri, 23 Jul 2004 18:50:05 - From: markdrela [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Re: Chamfered Mylar leading edge - helps wrap around --- In [EMAIL PROTECTED], Cliff [EMAIL PROTECTED] wrote: Did I read a post that someone is beveling the leading edge of the 14 mil mylar used for bagging? If that person will please step forward and say how they are bevelling the leading edge on the mylar, I and most of the folks here would probably like to hear about, and whether it helps with the little leading edge issues. Yes, it lets the Mylar follow the curvature closer to the LE. One way to make the bevel is by scraping with a blade, with the mylar sitting on a hard metal or glass edge. A box cutter is easier on the fingers than a single-edge blade. Works OK for small tail mylars. For large mylars I use a Dremel carbide bit, set up over a steel plate like a minature angled planer. The shavings make a mess, since they tend to static-cling to everything, so prepare work area accordingly. My bevels are 1/4 to 3/8 wide, tapering to maybe 0.005 thickness at the edge. This is hard to judge while scraping, so some sort of edge thickness stop made from shim stock may simplify the job. Haven't tried that yet. -- The thread continues with more hints and opinions. I scaped my own mylars with blade and it was easy to do. I think that the SuperGee thread in RCGroups Hand Launch forum also had some pictures about this method. Also a technique for notching the mylars around the tip contour for better fit there as well. I would like to get reference to this one too. Arne 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] European Receiver Help please
On Wed, 22 Dec 2004, Scobie Puchtler wrote: He'll be needing a full range RX in the sub 10 gram range, similar in size and weight to an FMA M5 or Berg. Can anyone help me out with sources, information, experience? Schulze: http://www.schulze-elektronik-gmbh.com/ 435 is a twin of Berg Microstamp, they were developed in cooperation. I have not heard anything bad about those receivers. I have two 835-s. Arne 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.
Re: [RCSE] Transfers?
Hi! Martin Kopplow has developed really nice technique. He prints directly on kevlar. Check out his tailfeathers on the link below (you must join the SALglider group in Yahoo to see them). Arne -- Forwarded message -- Date: Fri, 2 Jul 2004 21:25:07 +0200 From: martin kopplow [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: RE: [SALglider] Printing on Kevlar with an inkjet pinter Ok, I've uploaded two pictures to the SALglider photo section at http://photos.groups.yahoo.com/group/salglider/lst?.dir=/Martin+Kopplows+Pictur es/Printing+on+Kevlar+and+tail+bagging.src=gr.order=.view=t.done=http%3a//br iefcase.yahoo.com/ Printing on fabric has advantages over printing on tissue when the size of the print is relatively large or even covers the whole part. It saves weight. It does not add a layer to the layup, forming no stress raisers at it's edges. It also makes the building process a bit easier if used appropriately. For a small print, such as a logo, I'd go the tissue way, though. First Picture (Layout, print and result): You can see a finished vert. full flying stab and a printed sheet of Kevlar or glass in front of the computer with the original layout on screen. Second picture (Bagging printed glass on balsa) You can see my vacbagging setup for a set of glassed balsa tailfeathers with cambered airfoil. The material under the part is somewhat flexible to allow the bagged part to sink in a little. Procedure: I first make the layout using my computer. This has the artwork in it plus all the marks for positioning and trimming. Leave a little space around the parts and at the edges of the print area. Then I roll out as much Kevlar or glass as needed on my cutting bench, stroke/blow away all wrinkles. I spray a sheet of usual 80g/m^2 copy paper (the size my printer takes, in my case it is A4) very thin with 3M repositionable photo mount and let dry a minute or so. I then put the paper buttered side down on the fabric at 45°, stroke it on. I trim the fabric exactly to the size of the sheet by either using a roller cutter and steel ruler (glass) or the Kevlar scissors. After preparing as many sheets as required, I go to my printer, put one in the paper feeder at a time and print on them in draft/economy mode. This ensures there is no excess ink soaking the fabric and blurring the image. Image resolution is limited to less than 30dpi or so by the distance between threads in the cloth, so there's no use in printing high resolution anyway. The first time I tried, I used a strip of tape to secure the sheet's LE when feeding into the printer, but that proved to be unnecessary, at least with my printer. It is - however - not recommended to try this with 90° cloth orientation: Threads (almost) parallel to the paper's edges will most probably get lose and tangle up the printer tractor. Cut the fabric somewhat smaller when 90° is required, so there's plain paper at the edges. After printing, it is a good idea to let the ink dry a few minutes, then I stick tape (non elastic, but sticky) on the fabric all around the edges and press on tightly. The tape overlaps at the corners, that's important. If I print more than one part on a sheet, I also put a tape in between the parts. Now I cut the parts apart (fabric still on the paper) right in the middle of the tape. I prepare my bagging rig, resin and tools, and only now I peel off the paper. Grab the paper with one hand, the tape with the other and slowly pull apart. Because of every cloth part being framed by the tape, it will not get irreversibly distorted during the process, even if this may look like it at first glance. I leave the tape on and put the fabric on the bench and blow on them: Just like magic, they will return to their original shape, use no fingers, just take a deep breath and blow on top of it. Then I wet it with epoxy and roll it dry, with the tape still on. Now I put the lower side fabric on a piece of overhead film (print looks mirrored now), put the core on top (can see exactly where, because of the printed reference marks) with the tape still on and place a piece of wetted out carbon roving around the edges of the core (thin one at TE). Now I put the top skin cut on another overhead film, put it on the core, adjust referring to the printed marks, put a sheet of prepared plastic film over everything, seal around the edges with acrylic and switch on the vac rig at max. It's getting noisy now in the shop, so I rather get into the kitchen and have a beer. After cured, I trim off excess fabric and the tape, sand the edges and so on. The result is in photo #1. Now I'm looking for a large format printer, that will feed Kevlar right off the roll :-) or at least allow printing the size of a wing panel. I could make nice wing paintjobs that way, or I could even print on the outmost layer of my Kevlar fuselages. I could take a digital photo and print it on,
Re: [RCSE] Tragi 705 X
On Fri, 8 Oct 2004, Bill Rakozy wrote: The Tragi 705 X-tail caught my eye at Visalia and I would appreciate hearing from those who fly one. (Build quality is in a class by itself!) Could you give me some TD performance feedback on the current version of the Tragi 705 X-tail (carbon). To include both the upside and any shortcomings. I have not flown one myself but I have a video from this summer showing Heino Kõrvel from Tragi flying his own brand new Tragi 705 with beautiful color scheme. The competition was like F3J, but winch launching was used. Estonian guys were flying Tragis, Latvian guys used Pikes and Elita. Heino won the competition. You need the DivX codec from http://www.divx.com/divx/download/ to view the video. Video itself: http://home.cyber.ee/arne/nurmsi2004/heino.avi Best regards, Arne
Re: [RCSE] testing the DC 9 at 11/10 of design limit
On Sat, 18 Sep 2004, Tom Watson wrote: The site should be called El Bustedlinko Concepts 'cause half of the links (including the MD80 landing) are dead... It's still useful. Get the missing filename, replace %20 with spaces, remove the filename extensions and Google. First match contains: http://www.aviationexplorer.com/MD80_VERY_Hard_Landing.mpg There are also lots of other stuff on this site. Arne 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.
RE: [RCSE] Antenna Info
On Fri, 13 Aug 2004, Simon Van Leeuwen wrote: Hi Anker, As you are refering to the transmitter antenna, you can include your body and the surrounding ground making up the GNDplane. As a result, the premise that the worst point of radiation os off the end of (directly in line) the antenna element is not true. These extra factors have the null point somewhere above the plane of the antenna element... Can you please clarify it. Are you saying that the worst position for the TX antenna is when it is sighting below the model? And best position is when it is pointed straight up? Arne 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] Battery alarm: LED or buzzer?
Hi! I crashed my plane do to insufficiently charged battery and decided to build low battery alarm. I looked around and there seem to be two kind of alarms: with LEDs and with buzzer (and some of them have both). What kind do you preffer? I found very simple and cheap schematics http://www.ncws.com/rcrock/lowbat3.htm that uses buzzer. BTW, the plane is DLG with small battery. Arne 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] Thermals near the seaside
Hi! The field that I'm using is located quite close to the sea (8 km). I have noticed that even on a very good days, the clouds appear to be much bigger and last much longer further away from sea. What is your experience? Are the thermals stronger away from sea? Arne 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.
RE: [RCSE] Flight Sim recommendations
http://www.sfspc.de/ 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] Cockpit MM manual downloadable?
Hi! I'm looking for Multiplex Cockpit MM manual in downloadable form. So far I have found addendum for Cockpit version 2.0 and manual for Royal Evo. Arne 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.
Re: [RCSE] Antenna configuration
I'm working up a minimalist pod and boom 2M and in order to further reduce the size of the pod thought I would put the receiver in the wing as the wing is rather large and there is plenty of room for the receiver in there. It's a 3-piece wing, though, and the center panel is only 20 so I was wondering if it's ok to run the antenna toward one tip then back an inch or so and then toward the other tip, repeating the process until the antenna length is used up. I do not know for sure, but I suspect that this is a bad idea. I recently did some experiments with antenna shape. I have DLG with carbon boom. I was little bit afraid that carbon tube might reduce the range and decided to put the antenna into wing. Antenna was coming out from the wing saddle and was then going to the wingtip, hidden in the slot in front of aileron. Since the wing was short about half of the antenna was in the fuselage, so the antenna was shaped like L. What happened is that I lost radio control and crashed the plane. I started to do range checks and found that the shape of the antenna affected the reception dramatically. Straight antenna was best. L shaped antenna had only half of the range. I did not test this configuration you are planning. Finally I did tests with antenna running inside tailboom and the with antenna running outside. There was no difference in range, so I put the antenna into tailboom. But best way to find out is to make a test. Lay your antenna down as you planned, connect receiver and servo, ask somebody to help you and measure the range. Compare with the range with straight antenna. Arne 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.
Re: [RCSE] You gotta REALLY wanna do this!!!
Has anyone here given thought on this thread that controls stick position at the transmiter doesn't really tell you anything at all about actual control throws at the surface of the model? Linkage, horn length, slop, flex, servo type and other variations wilklhave an effect on actual throw. If you want to do this, rig something to actually measure throw in angular units verses transmitter movement in angular units. ATV in numeric units ??? thats exactly what i proposed to do at #2: to pick up the actual input signal vs control surface deflection graph using computer. all the graphs that are drawn later, when you are creating a setup for TX (at #4) show actual control surface deflections. or percentages don't tell a lot, and variations in models and installations will present different throws for the same transmitter inputs. I think the idea is neat, but I don't think it will really make it as it's gonna be too costly and complicated to be available to the limited user base, and results won't be guaranteed. one thing i forgot to mention: the market for this kind of system is really small. if this is done commercially it will die sooner or later. i believe that open source project of some kind would be much more successful and useful for everyone. arne 1) it is possible to build a very cheap computer controlled multichannel servo signal coder/decoder using some microcontroller chip. RS-232 would be a cheapest way to connect it to PC. 2) you hook your plane to this device and measure the control throws of all control surfaces. perhaps not just min, center max but at more points, to get more exact response of the control surface to input signal. computer will drive the servo and you manually measure the deflections (i think that automatic measurement would be too expensive to implement). this is one time job. 3) a software model is created for every TX. the model captures the programming model of TX and all it's capabilities. creating a model is big work and must be done by someone who throughly knows the TX. of course: if the manufacturer is cooperating, it's much easier. (the model captures only behaviour of the TX, the user interface, programming and communication is dealt later). the abovementioned device can be used to measure the exact charcteristics of the TX: you hook this device do your receiver, move the stick to some particular position and let the calibarating program to measure the servo signal. you can pick-up exact characteristics for differential or whatever you need. 4) the model of the particular TX is realized as a plugin for a bigger programm that can be used to program your TX. the programm provides unified user interface for all TXs: with sliders, knobs, switches, sticks, whatever. you can select TX model and create various setups for it, compare setups (graphically), store them to file on PC and so on. this programm can drive the servo signal encoder described above, so you can test the setups on your plane. if you want to transfer your setup from one TX to another you can compare the output graphs of setups from different TXs and alter the parameters of the destination TX until you achieve a similar output graphs. since you have measured your plane (on step one) you can observe the real behaviour of the control surfaces. 5) the programming instructions can be added to the TX model. so if you are satisfied with your setup, you can print out detailed programming instructions for your TX. or you can re-create the model in your computer by following the programming instructions. this can be done for every computer radio. advanced options: 1) if the TX has a PC interface and if the format of the programming data is known, one can create additional (different) plugin for this TX that handles the communication and uploads/downloads the configuration to/from TX. this plugin cannot be created for all types of TXs, it's not that universal, it might even be platform-dependent. 2) add some automatic conversion function that will try to convert setup of the one TX to another (using neural network or something like that). arne 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-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.
Re: Blue screen sandbagging, was [RCSE] GUI programming for TX's
Oy, now you're talking about actually *controlling* with the computer? I mean, that would be fun, and it's definitely possible, but that's some wicked klunky. In that case, I think you'd want to start with a Palm and write a custom app to talk to a custom-built Tx module with sticks for input. All possible, interesting, difficult, and expensive. i added a mixer to my hitec focus 4am transmitter. the mixer is an analog computer. when i built it i looked at the possibility to build a PIC based digital computer instead. the problem was a DA converter. AD converter for sampling the stick positions is very simple. microcontrollers with sufficient number of analog inputs are available and cheap. at that time i found only one microcontroller that had a built in DA converter. it's certainly possible to create small addon board for simple non-computer radios that would sample the stick positions, send the data to PDA using RS-232, receive the processed data and send it to transmitter circuit. imagine: you can record your manouvres to PDA and replay them later :) only one thing bothers me little bit: reliability of the software. some kind of emergency cutoff switch for fully manual control is probably required to save your plane when PDA crashes. arne 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] priming white foam before fiberglassing?
hi! i remember that i read sometime from somewhere that it's a good idea to prime the white foam wing core before fiberglassing it. if i remember correctly it was white glue or aliphatic resin (perhaps thinned with water) that was recommended. anybody can comment is it useful or necessary? arne RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] trouble with bubbles
hi! i have some trouble with fiberglassed balsa winglets. take a look at http://home.cyber.ee/arne/winglets/winglets.html. first picture shows the bubbles that are troubling me. what should i do with them? cut open and put some CA under the skin? or just leave as they are? arne RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] Gentle Lady on slope
Hi! What kind of slope (how big and steep) is required for Gentle Lady? Or is it impossible or pointless at all? I just attempted to fly mine on the biggest local slope and was lucky enough to get it back undestroyed. The slope is steep and quite low (about 15 meter high), the wind was strong (the plane was moving very slowly). There was some lift near the edge (plane raised sharply couple of meters), but it was impossible to turn back (plane was drifting very quickly downwind when I changed the cource). Was the slope too small? Wind too strong? Or do I just need the aileron ship? Arne RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
[RCSE] why are ailerons top-hinged?
hi! simple question: why are ailerons top-hinged? i have two explanations: 1) they look better this way 2) since the pushrod is usually on the lower side of wing one can use shorter control horn (by the thickness of the aileron), to achieve same throw that helps to reduce drag somewhat. since i'm putting the pushrod on the top of the wing i would like to put the hinge to the lower surface. are there any aerodynamical consideration which make the top hinged ailerons with continous upper surface more desireable? arne RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
Re: [RCSE] How do you read a polar?
I went to the selig website to look up some airfoils and the polars are completely greek to me. How do you interpret the data? Is there any take a look at http://members.tripod.de/MartinHepperle/Airfoils/howdoi.htm RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
Re: [RCSE] why are ailerons top-hinged?
It's usually because ailerons have more upward deflection than downward, especially in a crow or spoileron setup. Having the hinge on top allows for yes, right. i didn't think about it. thank you very much. arne RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED]
