What Receiver Battery reqd. for 30c , 11 lb. Extra 300?
 

This is my first gas plane.... I'm used to large glow planes....
What receiver batteries do you recommend?
I was going to use a 2000mAhr 6V NiMH battery pack, until somebody told me they use a 10,400mAhr LiFe battery!!!
Damn.... isn't that overkill?
I will have 5 HiTec HS-5685MH servos. rated for 7.4V 180oz in torque with 6V (plus a smaller throttle servo)

Does ANYBODY still use the NiMH 6V packs??

Are LiPo batts as good as the new LiFe batteries (I don't know ANYTHING about LiFe)

I guess I've got a lot to learn about these larger, gas planes....

HELP!!!

Don

I’ve used a four cell 2400mah Nickel Cadmium receiver battery pack for the past 20 years for my 50cc powered planes with no problem. Batteries with Lithium in them tend to get on fire in Boeing planes, model planes and houses. Dan.http://www.rcuniverse.com/forum/atta...mentid=2115588

Yes a 10Kmah battery is way too much for a 30cc plane.I run (2) 4500 mah LiFe packs for the receiver and a 2500 LiFe for the ignition on a 100cc plane !
On some of my smaller plane I use LiFe packs , LiPo packs and NiMh/NiCd packs. When the Nixx packs time is up I switch over to LiFe packs.
LiFe packs have a lower voltage than LiPo and most modern receivers and servos can handle the voltage without a regulator. A LiPo pack has a higher voltage and regulators need to be used ....unless you are using the new high voltage servos.
I have a 30cc Yak and I run an 1800mah LiFe pack on the receiver and a 1200mah LiFe on the ignition and I can easily fly 4 flights.


It really depends what make engine and ignition you have as some have very power-hungry ignitions. If it's a magneto engine then you obviously don't need a battery.

Exactly.

What motor are you planning on running?

A single A123 2500 with a TechAero IBEC powering the ignition is what I use on anything that size

I may use a 1.60 O.S. glow motor, or a DLE 30cc gasser.

Well if you go glow you won't have to worry about an ignition eh? :)

The DLE 30 just go with what I said. The Tech Aero IBEC eliminates the need for an ignition battery and gives you an optical kill switch so you can turn off the motor from your transmitter, something you want in any case.

A 2000mah pack will fly the plane. Use the type of pack that suits your receiver,servos, and charger as we already described.
For the DLE ignition just add another pack 1200mah or higher and make sure to install a mechanical switch between the ignition and the ignition battery. There are other ways to do it and other electronic pieces you can add but this way is the simplest.

I had been using separate RX and ignition batteries for years. I finally set up an airplane with a Tech Aero IBEC and found it much easier to install and maintain over separate batteries. The ability to shout down the engine via TX and be able to set up the engine kill with fail safe is IMO priceless.