Is it OK to use a 6 volt nimh battery for ignition?
#26
RE: Is it OK to use a 6 volt nimh battery for ignition?
ORIGINAL: OliverJacob
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.
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.
#27
My Feedback: (48)
RE: Is it OK to use a 6 volt nimh battery for ignition?
I recently installed a A123 battery pack to power the ignition on my DLE 20. When installed directly (6.6vdc), the engine would run, but sounded ragged, like it was out of tune or had a fouled plug. Added a regulator, which stepped the voltage down to 5.95vdc, ran better, but still not right. Reinstalled the 4 cell NmHd I just took out and everything was back to normal.
I still want to use the A123, but it looks like I'll have to get the volts down to less than 5 for the ignition to be happy, at least on this particular module.
I understand RcExcel has updated units designed for use with up to 7.4 vdc now.
I still want to use the A123, but it looks like I'll have to get the volts down to less than 5 for the ignition to be happy, at least on this particular module.
I understand RcExcel has updated units designed for use with up to 7.4 vdc now.
#28
My Feedback: (54)
RE: Is it OK to use a 6 volt nimh battery for ignition?
ORIGINAL: BarracudaHockey
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.
ORIGINAL: RCFlyerDan
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.
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.
I dont fly DA but I'm going to guess they dont make their own purpose built ignitions.
#29
My Feedback: (2)
RE: Is it OK to use a 6 volt nimh battery for ignition?
ORIGINAL: RCFlyerDan
Yes, there is an Up side to using a 6V over a 4.8.....if you are flying all day, and the 4.8 drops below the 4.8, the engine may quit in the air at an inopportune time, like in a hover.......if a 6V drops below 6V, the engine still runs!
ORIGINAL: BarracudaHockey
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.
ORIGINAL: RCFlyerDan
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.
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.
I dont fly DA but I'm going to guess they dont make their own purpose built ignitions.
Acting for all the world like there's a fuel problem or something else weird that causes erratic running. This gets progressively worse until the engine will only idle or refuse to restart - but it won't just quit in a hover....
#30
My Feedback: (54)
RE: Is it OK to use a 6 volt nimh battery for ignition?
ORIGINAL: ahicks
I've NEVER seen an engine quit due to low voltage. They DO loose power, and start acting up at higher power settings.
Acting for all the world like there's a fuel problem or something else weird that causes erratic running. This gets progressively worse until the engine will only idle or refuse to restart - but it won't just quit in a hover....
ORIGINAL: RCFlyerDan
Yes, there is an Up side to using a 6V over a 4.8.....if you are flying all day, and the 4.8 drops below the 4.8, the engine may quit in the air at an inopportune time, like in a hover.......if a 6V drops below 6V, the engine still runs!
ORIGINAL: BarracudaHockey
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.
ORIGINAL: RCFlyerDan
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.
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.
I dont fly DA but I'm going to guess they dont make their own purpose built ignitions.
Acting for all the world like there's a fuel problem or something else weird that causes erratic running. This gets progressively worse until the engine will only idle or refuse to restart - but it won't just quit in a hover....
#33
Join Date: Jun 2004
Location: Harrisburg,
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RE: Is it OK to use a 6 volt nimh battery for ignition?
That would be just to easy! But really I load test all 3 battey packs befor each flight even i just rechared them. Also I look over the flight serface linkage and servo horns.
Better safe than sorry.
Better safe than sorry.
#34
My Feedback: (11)
RE: Is it OK to use a 6 volt nimh battery for ignition?
ORIGINAL: RCFlyerDan
Yes, there is an Up side to using a 6V over a 4.8.....if you are flying all day, and the 4.8 drops below the 4.8, the engine may quit in the air at an inopportune time, like in a hover.......if a 6V drops below 6V, the engine still runs!
Yes, there is an Up side to using a 6V over a 4.8.....if you are flying all day, and the 4.8 drops below the 4.8, the engine may quit in the air at an inopportune time, like in a hover.......if a 6V drops below 6V, the engine still runs!