Re: [RCSE] 1.5M span rule at IHLGF
In a message dated 5/27/00 11:42:54 AM Pacific Daylight Time, [EMAIL PROTECTED] writes: > Let's see 150 cm /(2.54 cm/inch) = 59.05" so a 59" plane sneaks by. > > Yes, get out those SAWS! > > Chris SAWS? SAWS? Clearly, Chris, you're too polite. Get out those ScrollSander saws! RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] antenna wire size
Thin copper foil with adhesive is available at any good stained glass shop in widths from 1/8 inch to 3/8 inch or so. You can cut it to a narrower size on the roll with a good (Master Airscrew) balsa stripper. -- Dick Barker Seattle, WA - The Old Fart Glider Flyer - _YK replied: >Wire size is always put in relationship to its wave length 0.01:1 is a >comfortable ratio. 0.001:1 may cause a mild concern of bandwidth . Dealers and vendor, can pay attention to this potential marketing opportunity, for "thin" copper foils with adhesive. :-). RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] antenna wire size
Hi Tony, Just about any size wire will work with your hand launch glider. The length should be 39" for 72 MHz. That will get you in the ball park. Thermals, Art Antonio Martinez wrote: > I know this has been addressed in the past - but I wasn't paying attention > (sorry YK)... Does the size of antenna wire matter, or just the length. I > have been using a pushrod as the antenna in my HL, but I'd like to use CF > rods instead. This means I need a bona fide antenna. I was hoping to use > wirewrap material (very fine dia copper wire) glued onto the fuse exterior. > Any antenna engineers out there? > TIA > a > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and >"unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] antenna wire size
Wire size is always put in relationship to its wave length 0.01:1 is a comfortable ratio. 0.001:1 may cause a mild concern of bandwidth. That will generate band selectivity and can cause some channel are more effective than another across the RC band. Over all wire size variation can cause much less impact than wire length (0.25wave on groundplane, 0.5wave air borne). Once again, we are using a ground base antenna in air borne applications that is electrically incorrect. I use 0.5wave across my 2m planes, or 0.5wave in "J" tips for my HLG. If CF is inevitable, we may apply "skin effect" on antenna theory. In principle, imagine a CF boom inside an aluminum tube-antenna. Majority of RF current flow at the outside surface of metal tube, that effectively making the CF transparent. knowing that the tail boom has a high aspect ratio, a practice 2nd best to the outside tube may be considered. That is to split a single wire into two equal length and run it outside the CF in all parallel arrangement. We would expect the RF one each paralleling wire to repel one another and concentrated at the far outer portion avoiding "seeing" the CF in between them. Any metal lengths or push rod MUST carry signal current "in phase" with the antenna current. That can be met by treating them in same fashion as a member of the team of split wires, except it stay at the core. However, all lengths must be equal to comply the "in phase" requirement. Aluminum strip with adhesive is one idea that comes into my mind at this point (only if you can make reliable electrical contact at all times without soldering connection). Copper although is solderable, some may think that is too heavy. I would use copper. When ever affordable, use 4 split parallel wire can produce improved result. The split wire ending near stabilizer need not be electrically connected together, but wire tips should not flare/diverge from one another by more than 0.05 of full wire "length". Dealers and vendor, can pay attention to this potential marketing opportunity, for "thin" copper foils with adhesive. :-). Let me know if I have missed any relevant points. _YK in Seattle - Original Message - From: Antonio Martinez <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, May 27, 2000 12:41 PM Subject: [RCSE] antenna wire size > I know this has been addressed in the past - but I wasn't paying attention > (sorry YK)... Does the size of antenna wire matter, or just the length. I > have been using a pushrod as the antenna in my HL, but I'd like to use CF > rods instead. This means I need a bona fide antenna. I was hoping to use > wirewrap material (very fine dia copper wire) glued onto the fuse exterior. > Any antenna engineers out there? > TIA > a > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] antenna wire size
I know this has been addressed in the past - but I wasn't paying attention (sorry YK)... Does the size of antenna wire matter, or just the length. I have been using a pushrod as the antenna in my HL, but I'd like to use CF rods instead. This means I need a bona fide antenna. I was hoping to use wirewrap material (very fine dia copper wire) glued onto the fuse exterior. Any antenna engineers out there? TIA a RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] swapping JR Tx crystals
Let me add to that. FCC care for emissions, any emissions that falls within the FCC bible. That include Rx emissions of a pre-approved radio product. Any RF Rx product that has one or more oscillators is potentially harmful until proven safe. Once proven safe, changing Xtals in Rx beyond its factor specifications (in theory) should not cause FCC concern but may cause Rx frequency offset. A Rx with offset frequency is a concern shared by the insurance company, and thus pilots who want to swap in non-standard Xtal. -YK in Seattle - Original Message - From: Graham <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, May 27, 2000 7:23 AM Subject: Re: [RCSE] swapping JR Tx crystals > Generally speaking, transmitters traditionally, at least in recent history, > have been the only radio devices that needed to be licenced while recievers > were not. > > I would think that swapping is not FCC approved as you would in all > probability your transmitter would no longer be properly tuned to the channel > of your xtal and would be in violation of being off frequency as well > interference > on adjacent channels and possibly spurious signals out of band (ie harmonics). > > So, to swap xtals in transmitters you would need to have the transmitter > adjusted > to its new frequency which would have to be done in a radio by someone with > the proper equipment > > cheers, Graham > > > At 08:29 AM 5/27/00 -0400, you wrote: > >when i needed a new flight pack, i figured that > >getting a JR 421 radio would at least provide > >a 2nd Tx battery pack, as well as, a 2nd set of > >crystals. i've been swapping Rx crystals, but > >thought i read that the JR transmitters are not > >FCC approved to allow field swapping of their > >crystals. > > > >is this true, and if so, what would it take to > >swap the Tx crystals? > > > >Gregory Ciurpita > >Lucent Technologies, Bell Laboratories > >Room 1N436, Crawford Corner Road, Homdel NJ 07733 > >(732) 949-5771 [EMAIL PROTECTED] > > > >"Good programs work. Great programs are easy to debug!" > >RCSE-List facilities provided by Model Airplane News. Send "subscribe" > and "unsubscribe" requests to [EMAIL PROTECTED] > > > > > - - > Graham[EMAIL PROTECTED] > > Are the shadows there for me to find, or placed there by my searching mind. > When I reach and find them gone, was I right or was I wrong? > > - -- > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] packing tape as hinge tape
It has been a common knowledge for RC fans in UK and Canada that one type of tape is also good in hinge tape application. It is Waterproof and durable which is normally applied / supplied in the medical industry. I do not know the trade name in the US, but it is labeled as "Blenderm" First Aid Dressing Tape. I have tried it and I like it. _YK in Seattle - Original Message - From: Ciurpita, Greg <[EMAIL PROTECTED]> To: 'RCSE' <[EMAIL PROTECTED]> Sent: Saturday, May 27, 2000 5:25 AM Subject: [RCSE] packing tape as hinge tape > i picked up some of this clear 2" wide 3m packing > tape and used it as hinge tape on the DAW 2m 1-26 > i just slapped together. it seems strong, but i > can see how if it gets cut, it will easily tear. > > what are the qualities of a good hinge tape? > > Gregory Ciurpita > Lucent Technologies, Bell Laboratories > Room 1N436, Crawford Corner Road, Homdel NJ 07733 > (732) 949-5771 [EMAIL PROTECTED] > > "Good programs work. Great programs are easy to debug!" > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] 1.5M span rule at IHLGF
I am not going to the HLG contest, but if there is a rule, there is a rule. 60" is NOT 1.5M and it is not close. If I were hosting a HLG contest where the rules said 1.5M I would have a jig, just like they would , I assume. The fuse would rest in the center and then gets pushed thru the span measuring jig (no tilting or YAW). A 60" airplane would not go through, but even 59" might sneak by. The measurement is tip to tip regardless of poly/dihedral in the flying mode. I imagine if you have a 90 degrees of dihedral one panel could be less than 59". AND, if you chose, you could have a bipe, but I would not accept a plane from those imaginative people which launches at 59" but the wing expands/opens to something greater (For those of you who recall Rolf Decker's F3B ship). Let's see 150 cm /(2.54 cm/inch) = 59.05" so a 59" plane sneaks by. Yes, get out those SAWS! Chris -Original Message- From: Timothy E. Cone <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]> Date: Saturday, May 27, 2000 9:17 AM Subject: [RCSE] 1.5M span rule at IHLGF >Hello People, > >I want to start a betting pool to bet on how many people have to use Mark >Navarre's Zona saw to get their HLG's to fit through the 1.5M jig. > >I think I remember 8 guys having to lop the tips off of their wings to get >the models to pass tech inspection last year. > >Lets see, 1.5 meters is close to 60 inches right? Yea, a 60 inch span >should be ok. > > >Timothy E. Cone >[EMAIL PROTECTED] >http://www.NightOps.com > >RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] 1.5M span rule at IHLGF
Hello People, I want to start a betting pool to bet on how many people have to use Mark Navarre's Zona saw to get their HLG's to fit through the 1.5M jig. I think I remember 8 guys having to lop the tips off of their wings to get the models to pass tech inspection last year. Lets see, 1.5 meters is close to 60 inches right? Yea, a 60 inch span should be ok. Timothy E. Cone [EMAIL PROTECTED] http://www.NightOps.com RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] Poles for Streamers
Hi Gang, I have had several questions regarding the poles I offered for sale on Friday so I will try to answer a few of them here. 1.) The poles are collapsible down to a length of about 46 inches. 2.) They are 4 section poles with each section 36 inches long. 3.) They have a plastic twist lock locking mechanism to hold them in either the collapsed or extended position. 4.) The base section is a 1" OD tube the final section is a 1/2" OD tube. 5.) I am not sure how much shipping will be for each location but I do not charge any packaging or handling fees so shipping charges will be whatever ups charges me. Probably less than $5.00 in most cases. 6.) And finally, I have nearly a hundred of these poles so there are plenty to go around for everyone. I you are interested let me know, I can take VISA, M/C, and Discover and can start shipping poles on Tuesday. I would suggest you get with your buddies and order multiples to save on shipping costs per pole. I think I can get up to 5 or 6 poles in the shipping box. See Ya, Pat McCleave Wichita, KS Ps. I can custom make longer poles up to about 30'. The longer poles will have a longer collapsed length because I am limited to no more than 4 sections per pole. I am working on an attachment for grabbing gliders for retrieving them from trees. Email me for prices on custom poles. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Interesting photo!
Brian Chan wrote: > The only way the picture is real is he just tossed the plane up > inverted and took the shot. > I agree, or your looking at a new Polygrip user! -- Rich Border http://www.netlabs.net/hp/soarrich RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] swapping JR Tx crystals
Generally speaking, transmitters traditionally, at least in recent history, have been the only radio devices that needed to be licenced while recievers were not. I would think that swapping is not FCC approved as you would in all probability your transmitter would no longer be properly tuned to the channel of your xtal and would be in violation of being off frequency as well interference on adjacent channels and possibly spurious signals out of band (ie harmonics). So, to swap xtals in transmitters you would need to have the transmitter adjusted to its new frequency which would have to be done in a radio by someone with the proper equipment cheers, Graham At 08:29 AM 5/27/00 -0400, you wrote: >when i needed a new flight pack, i figured that >getting a JR 421 radio would at least provide >a 2nd Tx battery pack, as well as, a 2nd set of >crystals. i've been swapping Rx crystals, but >thought i read that the JR transmitters are not >FCC approved to allow field swapping of their >crystals. > >is this true, and if so, what would it take to >swap the Tx crystals? > >Gregory Ciurpita >Lucent Technologies, Bell Laboratories >Room 1N436, Crawford Corner Road, Homdel NJ 07733 >(732) 949-5771 [EMAIL PROTECTED] > >"Good programs work. Great programs are easy to debug!" >RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] > > -- Graham[EMAIL PROTECTED] Are the shadows there for me to find, or placed there by my searching mind. When I reach and find them gone, was I right or was I wrong? --- RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] swapping JR Tx crystals
when i needed a new flight pack, i figured that getting a JR 421 radio would at least provide a 2nd Tx battery pack, as well as, a 2nd set of crystals. i've been swapping Rx crystals, but thought i read that the JR transmitters are not FCC approved to allow field swapping of their crystals. is this true, and if so, what would it take to swap the Tx crystals? Gregory Ciurpita Lucent Technologies, Bell Laboratories Room 1N436, Crawford Corner Road, Homdel NJ 07733 (732) 949-5771 [EMAIL PROTECTED] "Good programs work. Great programs are easy to debug!" RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] packing tape as hinge tape
i picked up some of this clear 2" wide 3m packing tape and used it as hinge tape on the DAW 2m 1-26 i just slapped together. it seems strong, but i can see how if it gets cut, it will easily tear. what are the qualities of a good hinge tape? Gregory Ciurpita Lucent Technologies, Bell Laboratories Room 1N436, Crawford Corner Road, Homdel NJ 07733 (732) 949-5771 [EMAIL PROTECTED] "Good programs work. Great programs are easy to debug!" RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Re: [RCSE] Where is Hitec? Good Question!
One would think that Hitec's web master would have left the original site alone while creating and testing a new site prior to publishing the pages on the web. Probably the difference between paying a company $50,000 for a complete web site and having the computer geek from the back office doing it as a side project for the same $8/hour he gets for counting servos. Jody Z RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
