phakur

My Feedback: (13)

I happen to have an extra 6v NIMH battery and do not have a 4.8 V battery pack (means I have to buy one). I have a DLE 30 CC engine I am installing on a piper pawnee.

Is it OK to use that 6 V battery for the ignition on this gas engine or do I need to invest in another battery pack?

I am using a separate 6V battery for the receiver/servos.

Thanks for responding
Larry

BadAzzMaxx

The ignitions will accept up to 6 volts, anything over that could possibly fry it.

At full charge your battery will be over 7 volts.

Up to you if you want to try it. ?????

Milton

jedijody

My Feedback: (1)

Don't do it....get the 4 cell.

Glyder

I have a dle20 ,30 and 55.....all three ignitions are using 6v nimh and i havent had any problems at all. You will be fine.

repinfl

My Feedback: (40)

WOW! Just who should one believe??????

Brian Smith

My Feedback: (117)

Mine run fine on a 4.8 4 cell. The paper work warns you against going over 6 volts and that is just what your doing with a 5 cell pack. I would listen to the guy (Jody) who has worked with this set up more than anyone else. or just risk it at your own expense. Brian

Brian Smith

My Feedback: (117)

Can you solder? Take one cell off. I have done it on several occassions. Brian

clivemc

4,8V is ample AND SAFE, do some searching the net, its been discussed plenty of times before.

BarracudaHockey

My Feedback: (11)

Considering the advice against is coming from Milton and Jody thats a pretty easy answer.

BarracudaHockey

My Feedback: (11)

What Pawnee kit do you have?

phakur

My Feedback: (13)

OK Question for Milton and Jody-and Response to ANDY

I installed the ignition system and the battery in the plane. I have NOT fired the engine up but have switched power on and off to the ignition system testing out my optical shut off. I assume that powered up the ignition system with that 6V battery pack. I did not rotate the shaft when doing that.

Would that have fried the ignition??

ANDY: I have the Texas RC Piper Pawneereal close to maidenperhaps two more weeks as I only get to work on it every other weekend.

Larry

Whistling Death

As cheap as NiMH batteries are why even chance it? A 4.8 weights less also.

Joespeeder

Hey Guys,

Would a CC BEC handle the load of a RCExel ignition?

Joe

jedijody

My Feedback: (1)

No, your ignition would survive that without problem.

ahicks

My Feedback: (2)

Why is it nobody has brought up the idea of using a 1N4007 diode to drop the fully charged 6v NiMh voltage to a level known to be friendly to the ignition module? I thought this was a pretty popular idea? You only need one, a pack of them are available for less than 5.00 at Radio shack, and they're pretty friendly to install if you know how to solder....

BarracudaHockey

My Feedback: (11)

And if you dont know how to solder then wrongwayrc.com sells a drop down for a few dollars.

That aside, its easier just to run a 4 cell pack.

Larry, cool...I'm building the H9 giant Pawnee right now.

exeter_acres

My Feedback: (2)

wow.. 16 posts and there hasn't been the obligatory.. Your airplane will blow up and you will kill puppy dogs if you don't run A123's??

something has gone wrong....

to the OP..listen to post 2 and 3.

Antique

My Feedback: (4)

ow, just like the oil debate...The instructions said 6 volts...The acknowledged master of ALL thing iginiion is Bill Carpenter, who has made and tested more ignitions than anyone else on the planet, says more than 6 volts will eventually kill the ignition...Who the @#$%^ are all you experts to dispute his experience ???
Yes, the ignition will work FOR A WHILE on more than 6 volts...Go ahead, but don't cry about it when the ignition quits, IT WILL....[>:]

Whistling Death

And when it quits, it might not be a pretty.

RCFlyerDan

My Feedback: (54)

On a quality engines like DA, you can use 6V, but I have had several(3) students try it on the Chinese engines and have fried the ignitions.

phakur

My Feedback: (13)

OK well I for one am convinced-The 6V pack is coming out to be used in the new Spacewalker I have been eying and a 4.8V pack is going in.

Thanks everyone for the help and insight to someone pretty new to the gas side of things.


And AndyThats a heck of a plane-more than I think I can handle. Good luck.

BarracudaHockey

My Feedback: (11)

I figured that he would know when the plane wouldn't fly. I mean, how could it possibly even get off the ground w/o A123's?? I wish we had the things when I was trying to fly in the 70s and 80s

BarracudaHockey

My Feedback: (11)

IMHO there's no upside to using a 5 cell pack, only downsides (weight, and possiblity of burning an ignition up).

I dont fly DA but I'm going to guess they dont make their own purpose built ignitions.

jedijody

My Feedback: (1)

DA doesn't make them but they are purpose built specifically for DA engines.

OliverJacob

My Feedback: (12)

The ignition module may or may not be able to handle the 5 cell battery. Bottom line - it is designed to work with a 4 cell battery.
And there is no benefit to gain from overpowering the unit. So if you spend hundreds of $ on your plane and engine, why not spend a few bucks on the proper battery.
A while ago I have used an optical kill switch and it gave me interferences, almost lost my plane. After I removed it, everything works just fine and I kill the engine with the throttle, like you do with a glow engine.
I will install a choke servo on my plane, it is hard to reach by when the cowl is installed and I can use this to kill the engine as well. No more optical switches.