|
|
|
CAN AN AR 9100 POWER YOUR IGNITION?
Is anyone taking power through their AR 9100 for the ignition?
I have a Hanger 9 Carden Yak with a DA 50 and I am looking for ways to cut wieght. I was considering running an extention from a channel and to the ignition on my DA 50 and going without a seperate ignition battery. My two batteries running to the AR 9100 are regulated to 6 volts. Would this create rf noise to the recievers? Although an AR 9100 has remote recievers it is a bus and not a reciever so why cant you do this? Also any reports from anyone using Fromeco batteries on an AR 9100 without regulators going to JR 8611A Servos? Are the servos holding up to this unregulated power? I have done it for a short time but people told me to stop because the servos would wear down. Im hoping to find someone who has been doing this long enough to say its okay. Thanks in advance for any experience or information anyone has on these types of set ups. Darren |
|
|
|
|
Re: CAN AN AR 9100 POWER YOUR IGNITION?
A buddy of mine is running this receiver and 2 batteries. One of the batteries has 2 leads, one to the ignition and one to the receiver. It is working fine but the ignition is not run through the receiver. If the ignition shorts the engine is going to die and he WILL land. It should not cause a problem as the other pack should continue to feed the receiver.
Dan |
|
|
|
Re: CAN AN AR 9100 POWER YOUR IGNITION?
I would not power the ignition from the receiver, the receiver was not designed for that as for the Second question, I had an AR9100 in my 43% Edge with a mix of servos 8611a's and 8711, power was 2 5200 fromecos unregulated, after about 50 flights the 8611a seized so that should answer your Second question.
|
|
|
|
Re: CAN AN AR 9100 POWER YOUR IGNITION?
Hey whats your weight on the YAK ? Have you considered a Tuned pipe. I have one on my Extreme Flight Extra 300, it weighs 18 3/4 LBS and my DA is pulling a hair over 34 LBS of thrust with a Mezjlik 23x8.
>> I took a look at the Yak Manual, it seems that with a bit of elbow grease and a few beers you could fit a tuned pipe through the CAN mount. Then make a small cut out in the base of the fuse for the Exhaust stinger exit. IMO this is better than putting your whole aircraft at risk by cutting out electronics and batts. |
|
||
|
Re: CAN AN AR 9100 POWER YOUR IGNITION?
Quote:
If I find a need for power later I will look at a tuned pipe. I had greeves a 40 percenter and the power increase was huge. Same will apply im sure. Darren |
|
|
|
Texas
Joined Jul 2006
1,487 Posts
|
Re: CAN AN AR 9100 POWER YOUR IGNITION?
I am currently flying an AR9100 and powering my ignition from the receiver battery, that part works fine and has worked fine for over a year... however
What you are suggesting is a little different and may not work as well. What I am doing is taking power from my A123 unregulated pack directly, it has two output leads. One goes to the receiver, the other to the ignition. The difference here is this, the AR9100 has internal diodes that protect one battery from the other. If one battery were to short you'd still have the other one for power to the receiver. There may also be some filtering going on. If you want to connect into the receiver's power bus you are on the other side of the diodes, so a short in the ignition or extension would likely render the receiver inoperable, at least for a while. While this is a real longshot (I've never seen it happen or even heard of it) it is a different setup. I'd try it, after extensive range checking using a flight log to detect any problems. TF |
|
|
|
|
Alberta, Canada
Joined Oct 2006
123 Posts
|
Re: CAN AN AR 9100 POWER YOUR IGNITION?
I run the same as Tom. Same battery second lead for ignition. I will admit I've been tempted more than once to try what you're suggesting. Haven't done it though. At least with the logger you can tell exactly what is going on. I'm not going to sweat an ignition dead short, or get redundant on a 50 class bird.
Mike |
|
|
|
Re: CAN AN AR 9100 POWER YOUR IGNITION?
Well my two bobs worth is there is no way in a month of Sundays I would do that or even take the risk. The reason is all these ignitions are capacitive discharge and that means they do fire voltage spikes back into the battery pack. The A123 with dual leads likely acts as a capacitor and that way you don't get 6000 voltage spikes per minute feeding back into your servos.
But going directly from the Tx to an ignition module is seriously testing the limits of your radio system and unless you can write this model off to experience I would not even try it. On the weight saving issue I bet there are a dozen ways to reduce the payload by looking at servo setups, fuel tanks etc etc without going to that extreme. Is your ignition capable of 7.4 volts because a 1200 MaH LiPo likely weighs little more than the wire extension your going to use to get to your ignition. Another factor that seems to have gone out the window with 2.4 Ghz is the twelve inch rule. That is where you tried like heck to keep your ignition circuitry etc as far as possible from the Rx in the OLD 72MhZ days. Does anyone still remember 72 Mhz or am I an old fuddy now. You see the servos are still the same regardless of 2.4 or 72Mhz or 50Mhz or 35Mhz or 36Mhz. The issue always was the ignition noise played havoc with the signal wire in your servo extensions, not always the Rx and that has not changed. I still keep my high voltage stuff way up front and rest of it back in middle. 2.4 Ghz is not the panacea for everything including ignition noise. |
|
||
|
Re: CAN AN AR 9100 POWER YOUR IGNITION?
Quote:
Cool man I am running the ES composites CF tuned pipe with a solid MTW 25mm Drop header. The whole set up is 11 ounces or so, very light and the power boost is nuts. Before the pipe on a pitts muffler a 23X8 prop would spin 5900 RPM , with the pipe it is spinning 7000 RPM , it a lot of power. The whole pipe set up for ES sets you back 225 - 250 bucks if I remember correctly. That cheaper than a new airframe or engine. >> I just checked ES website, looks like prices went up, the pipe is now 230 bucks, it was less when I bought it lame. |
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Similar Threads | |||||
Category | Thread | Thread Starter | Forum | Replies | Last Post |
power expander and ignition | Wheels | Onboard Electronics | 6 | 08-30-2008 05:01 PM | |
So a 9000 rx with a smartfly power expander? or 9100 | Show871 | Radios | 9 | 07-30-2008 03:01 AM | |
New 2.4GHZ RECEIVER NO NEED FOR POWER BOXES | ULTIMATE1 | What's Hot | 66 | 03-12-2008 02:30 AM | |
Li-ion on ignition - why not ? | i3dm | Gas Engines | 33 | 04-20-2006 09:52 PM | |
Can vibration cause regulator to fry ignition? | damien | Gas Engines | 18 | 02-17-2006 08:31 AM |