Excellent!

How'd you determine and calibrate for frequency?
If you're in the USA or OZ it should be 42inches (Hitec list the relevant antenna lengths on their site)
If you're battery pack has rubbed through, I'd be tempted to get a replacement. Not worth flying any plane, let alone a gasser, with less than ideal batteries.

there is a guy here he dose avionics for quantas and is licenced for certification he found it with his gismos it looks like nasa in his shop and the battery only has a sratch on the outer case it rubed through the foam and no penatration .
but i still need to test full range test i will report on the weekend .

OK, you're in Oz like me. BTW it's QANTAS without a U

Good luck with yours. Mine is still a few weeks away from it's maiden.

queensland and northan territry air service = qantas
sorry about spelling tired

Well done,

The TX module being off frequency suggests and supports the OEM's claim and or requirement for the need to retune and or at least check signal after crytsal change outs, as in your case...

How did you ascertain the RX antennas were shorter than required and or desired by the OEM? Its unlikely they were shorter than required IMO.

The battery and gear metal abrasion could have been a BIG problem.

The crytsal had never been removed from the day a buy and the anttena all are done at tune length to create the maxium gain it was about 4inch shorter than standard why i do not know i did not cut it and i agrree the battery is most likley the main cause but i count my self lucky i found somthing i am still going to get a jr 9xv2 to use on my big plane and i thank everyone for the help even when i was hot under the collar .

Sorry for the confusion on the crystal(s) I mixed you up with another guy from OZ land.

The standard length for antenna wire length for Hitec RX's is below.

27MHz - 22 inches
72MHz - 42 inches
75MHz - 22 inches

I don't recall what frequencies ya'll play with down there.

36 megs

Hi, no problem. I wasn't trying to be the spelling police but I didn't want non-Australians to get the wrong idea on how to spell QANTAS.

and 42inches for the antenna wire just like 72Mhz gear. I realise the length is related to the wavelength but don't know enough techo stuff to explain it.

Well my old man sent the engine in to hobby services about 2 weeks ago and they never even looked at it but they sent a brand new engine, now we installed it and tried it again and still had the same problems, so we called hobby services again and they said to send the engine back in and they'll throw a new (new as in prototype) ignition system in it so when we get the engine back i'll let ya know what happens

Well I'm having problems with my PW Extra and a fuji 50 with magneto ignition. I'm using Futaba transmitter and FMA Direct co-pilot. Both of the suppliers have just told me to move the antenna location from the bottom of the fuselage to the top. I've also have a y-connection for the elevators and have been told to use a filter on that. Will try both of these this weekend to see if that solves the issues

I would never fly with HITEC especially with gas. I had a brand new out of the box OPTIC 6 with a QPCM and fm receiver. Lost 2 planes the same day. Sent in the radio and hitec repaired it. I asked them to help me out on the planes. They said they could do nothing even though it came from the factory bad.. This radio was out of box new and used for these 2 planes only. I lost a 2500.00 cap gas and an Ohio models V2 katana. I had a very experienced pilot help on everything and everything was correct except the bad radio from the factory. I WOULD NOT FLY YOUR PLANE WITH THAT RADIO!!. We had a frequency checker and the radio was transmitting on 2 freqs. I hate to sound so sour but I can't believe HITEC would not do anything for me since the system was brand new. I could understand if I owned it for a while but this system was brand new. Well I will stop. Good luck on your project. Hope everything works out.

I had an interesting weekend trying to figure my airplane out. It has two 4.8 volt 1300mah ni-cads that showed 5.0 volts under load. I failed the range test getting out around 125 feet with the system going into fail safe. I though maybe one of the batteries was bad so tried one at a time and the range went down to 50-100 feet. I them disconnected both batteries and tried a friends who’s battery registered 5.25 volts and it passed the range test of over 150 feet with flying colors. I would think that anything above 4.8 volts should work fine so a little perplexed at the moment.

figured out prob. with that fuji 50 ei. set it to ch ign. they hooked me up it was the factory ign. causing the prob. range running is now 150 feet ...

Hi ,

I'm french and excuse me for my bad english !!!!!
I have a Patty wagstaff Great planes with Fuji 50 EIS and i have a same problems.
I have a ignition interference radio problem but it's not constantly ....
My radio equipement :
2 Battery receiver
Tx FC28 Robbe / Futaba
Servos S9402 with all filters
Frequency 72MHZ

All my plane has not metal to metal and the installation engine is same of paper buiding in plane or engine box.

I don't have solutions but i search by 2 month's all the week-end and it's not enjoy from me.......

I think that ignition module is not a very good quality may be.....but plane is very good ...

Do you have a solutions? nobody?

Sincerely.

Kevin

It's the electronic ignition that's creating the interference. I have first hand experience with this problem. I have seen this in both C&H electronic ignition and worse with the Fuji ignition. I was adjusting a brand new Fuji engine for a guy at my club and I noticed that the radio got glitches even when the transmitter was close by. I then asked the guy to range check his radio with the engine running and he couldn't even get 10 feet. Upon investigation, I noticed that the ground wire was hooked up to the engine at the engine mount. This is really bad grounding because the current has to travel from the sparkplug all the way through the engine and to the ground wire. If you ground it this way, the engine becomes the radiator. What you really want is the shortest distance to ground by means of connecting the ground wire directly to the base of the sparkplug. Study the brison engine and you'll see what I'm talking about. Even so, I doubt that you will completely rid of the problem. The main problem is that the electronic ignition is not properly filtered inside in the circuitry or they used a bad coil. My friend just recenly bought a C&H electronics ignition module and he was having the same problem. We tried to improve the grounding but without success. It did improve the range a bit but still not air worthy. He finally sent the ignition back to C&H for a replacement.
My advice is look for another ignition brand. The Fuji ignition is a lemon.

I'm a newbie to gassers and I have a thread on interference and Tx and Rx on this forum. I wanted some help and Silversurfer told me to read some other threads about engine interference. So I found this one and have read alot and comprehended alot on this thread. But I am still a little confused! What is the best package for an Aviation Models 30 % Yak 54 with the Brison Revolution 52cc in it. I would like to know what Radio and misc. equipment I will need for the best results and some pictures of how it should be set up. I know this is asking alot, but this is my first giant scale plane and a big investment. I don't want it to crash and burn. I am also ordering the book on gas engine set ups from Dons Hobby Shop. Please help me here on this thread or mine.

Thanks Alot,

Gibbs

sorry about this but we figured out our problem and they hooked us up with a new ignition system and it flys great and thanks for the help from everyone