Wild Hare 88" Edge 540 Build

[pipercub123]

	Quote: Originally Posted by dunk
	I have the same set up plane,motor and using A123's I did how ever use a regulator and had to re-run the wires and zip tie to the bottom of the fuse to eliminate the interference that I was getting. I could only get about 40 feet away and the servos would go wacky. If you have the Rexcel ingnition I think I would regulate the voltage down to 6.0 vlts. hope this helps

I'm just speculating that perhaps the ignition isn't enough of a load and that it could be receiving too much of a voltage that could exceed the shielded wire's ability to shield a higher spark current. I am tempted to get my voltmeter out to check this. Than again you'd think the shielding would be ample enough anyway, especially if there is a regulator in the ignition's output which I have no idea if that's the case.

This has been the first few runs since the DA50 has been back from the factory. I had sent it in because I had been having trouble with occasional hard starting after refueling and getting unexpected flame outs. Now the engine starts great, stays running, and I get several one flip starts. They replaced all the seals, but nothing was done with the ignition. Before that the engine had little time on it.

I'm not sure what the Rexcel ignition is. It is whatever comes with a newer DA50.

[hollywoodjax]

Rcexcel ignitions do not come with the da's. They come on the other engines like: dl/dle,area51,crrc,3mm,ect. Da and 3w make their own ignitions. If you are using a voltage reg. on the a123 for the ignition then it should be fine. A lot of times when the ignition starts to fail you will have the throttle servo will act up.. If the canister and header rub then they have been known to cause interference, but you said that it was not touching. Try and run a ground wire from the ignition to one of the motor mounts. It may work, I have heard of people doing this before. Dunno if it will help but just a thought. Do you get any glitches without the motor running? Have you tried another reciever? Hard to tell without being able to see it and help figure it out.

[pipercub123]

	Quote: Originally Posted by hollywoodjax
	Rcexcel ignitions do not come with the da's. They come on the other engines like: dl/dle,area51,crrc,3mm,ect. Da and 3w make their own ignitions. If you are using a voltage reg. on the a123 for the ignition then it should be fine. A lot of times when the ignition starts to fail you will have the throttle servo will act up.. If the canister and header rub then they have been known to cause interference, but you said that it was not touching. Try and run a ground wire from the ignition to one of the motor mounts. It may work, I have heard of people doing this before. Dunno if it will help but just a thought. Do you get any glitches without the motor running? Have you tried another reciever? Hard to tell without being able to see it and help figure it out.

No voltage reg. Will try a 4.8v pack to see if there's a differance and if so a reg will be on order. Will try the ground idea too. No glitches with engine off. Haven't tried another receiver. Thanks for suggestions.

[hollywoodjax]

I am not sure what da suggests for the voltage but I know that if u are using the rcexcel or some of the others they recommend you to use a voltage reg. More volts does not give you any hotter of a spark, just gonna make the ignition go out faster.... I run all my ignitions on either a 4.8 or a 7.4 li-ion with a reg. Now even if was going to use a123 packs I would still use a reg. for it. Just my opinion!!!! Hey if you do have to send it in I don't know if i'd tell them that it was unregulated... They might not cover it under warranty, that is if it still under warranty....

[hollywoodjax]

Always here to help if able!!!!

[Tired Old Man]

Better to run 4.8v on RC Exl ignitions. They last longer that way.

[hollywoodjax]

All of the ignition reg that i use are fixed at 5.1 volts less than a fully charged 4.8!!!

[pipercub123]

	Quote: Originally Posted by hollywoodjax
	All of the ignition reg that i use are fixed at 5.1 volts less than a fully charged 4.8!!!

Speaking of that, I just charged my 4.8v to take it out to test it today and it read 6.0v fully charged. Right now I have a 6.0v pack charging just for maintenance and it's almost done at 7.7V! I know DA says it's okay for a 6.0v so you'd think the A123's would be okay seem so they're supposed to be running at 6.6v.

Oh well, we'll see today. The only differance is an extra oz of weight between the packs and the obvious slow charge of the nimh which I hate so a reg will be bought if this is the answer. Yes I already got spoiled by the A123s.

Was wondering where you got your reg? I saw one from TBM that sounds similar to your's. Some of the Fromeco regs are around $60 and that's a bit out of my budget. If I can't find a good cheap reg, may just stick to what I have as 2000mah should be enough flying time for my hands to get tired.

Wrapped some more teflon tape for a tighter fit on the canister. Yeah, still rotating a little but no leaks. My header is nice and tight without much tape, but the canister inlet has a diamond plate style friction section on it that I think is doing the opposite of what was intended with the slippery silicone. If the tape won't do it, time to break out the screws.

My cowl has taken a beating and now it is so oily I'm having trouble getting CA glue to stick with accelerator. May clean it again with alcohol and use epoxy. I did cut the mount ring so I wouldn't have to rotate the can and used some screws to hold it as the lower blind nuts are really hard to reach. Everything is okay there now, but if the cowl won't stay glued I may have to order up another one. Than I'll just move the canister back ahead of the gear like you did.

Anyone know how much a cowl should run from WH? Until mine is fixed I'm flying with no cowl. I know, what a way to treat a good lookin plane. I do like the airbrake effect on landing. Almost like flaperons.

[pipercub123]

Same thing with the 4.8V pack. I've tried unplugging all servos from the receiver except the throttle and same result. Must be time to send my ignition in.

[Tired Old Man]

4.8 to 6v is acceptable on DA ignitions. The glitch you are experiencing is not likely coming from the ignition itself. DA makes very good ignitions and are well shielded with a resistor in the cap. Look for the problem to be caused by some other electrical or metal components in your plane. If your flying 2.4 it could well be the radio itself.

The maximum recommended difference between an engine off and engine running range check is 10-15%. Anyone electing to fly with a 50% difference should start saving their money. They'll need a new plane soon.

[pipercub123]

	Quote: Originally Posted by Tired Old Man
	4.8 to 6v is acceptable on DA ignitions. The glitch you are experiencing is not likely coming from the ignition itself. DA makes very good ignitions and are well shielded with a resistor in the cap. Look for the problem to be caused by some other electrical or metal components in your plane. If your flying 2.4 it could well be the radio itself. The maximum recommended difference between an engine off and engine running range check is 10-15%. Anyone electing to fly with a 50% difference should start saving their money. They'll need a new plane soon.

I forgot to mention that I tried grounding the ignition to an engine stand off and no luck. I'm flying a JR 8103 FM with a JR Scan Select RX. This is the first time I've ever used A123s with my system. I have used 6.0V packs with the same RX and no problems.

I'm thinking of testing a spare RX I have, a standard HD switch, and a 6.0v pack just incase. I may also bypass my ignition switch as well for testing.

I am using a metal pushrod for a choke linkage as it was the easiest to operate by hand. I've used the same setup before with no problems and it doesn't seem to vibrate.

Would 2.4 Ghz be less prone to this interference or likely result in lockout?

Thanks.

[wildhare]

	Quote: Originally Posted by pipercub123
	Would 2.4 Ghz be less prone to this interference or likely result in lockout? Thanks Tom!

Any of the name brand 2.4 radios will offer much better noise immunity than 72mhz. 2.4ghz is such a high frequency that it's almost impossible to generate a signal in that range by accident.

Of course a malfunctioning ignition can overwhelm almost anything by sheer force, but if the ignition is working properly, power is good and the installation is done properly I've found 2.4 to be bulletproof.

I have now been flying 2.4 for 3 years. I started with a DX7 and have used every brand of radio on the market. I have yet to get even a glitch when flying.

My personal favorite now is the Hitec Aurora 9, but they all work.

TF

[pipercub123]

	Quote: Originally Posted by wildhare
	Any of the name brand 2.4 radios will offer much better noise immunity than 72mhz. 2.4ghz is such a high frequency that it's almost impossible to generate a signal in that range by accident. Of course a malfunctioning ignition can overwhelm almost anything by sheer force, but if the ignition is working properly, power is good and the installation is done properly I've found 2.4 to be bulletproof. TF

I guess I do need to upgrade sooner or later. Makes me curious if 2.4 would be strong enough to overcome the interference. Talk about a band aid fix.

[wildhare]

	Quote: Originally Posted by pipercub123
	I guess I do need to upgrade sooner or later. Makes me curious if 2.4 would be strong enough to overcome the interference. Talk about a band aid fix.

I do recommend that you find the source of the interference first. Using a PPM receiver is a very good way to find problems because it will show up every little but of noise that gets through.

But a good 2.4 radio will make it seem as though you never had a problem.

TF

[pipercub123]

I pulled the ignition and was able to see a small spot about an 1/8" where the strands were still in place but broken, enough for me to seperate them with a bit of pressure. Had to use a bright LED light to see it. Last time I checked at the field I must have overlooked it as the damage was very small.

I'm hoping that's the problem. It surprised me to see how delicate the shielding is once it starts to undo itself.

Trying to come up with a fix to get me through another week of flying, I did consider running some bare stranded wiring in a tight wrap over the bad section and into the good. However, it is an aircraft and I'd feel much better with DA doing a proper repair. So off it goes.

One thing I am going to do is to get some better wire looming once it comes back. I'm very impressed with the DL engines coming with the looming on the ignitions.