skunkwurk

My Feedback: (18)

Hello,

Does anyone know if 3c Lipo (11.1v) is supported by Kingtech G4 model turbines?

Dansy

My Feedback: (53)

3S Life still....the only draw back......

skunkwurk

My Feedback: (18)

Bummer - but thank you for confirming, Dansy.

Zeeb

My Feedback: (41)

i talked to Dirk about the limitation. It's actually 10.0 volts and the limiting component is the igniter. Freshly charged LiFe's should be drained down to the 10.0 limit before you start the Turbine.

skunkwurk

My Feedback: (18)

Thanks, Zeeb.

Dansy

My Feedback: (53)

The 10v has always been the least since G1, the motor won’t start if the voltage is above, self preserving

Jason_H

I've just checked the G4 manual to see if it mentions anything about the 10.0V limit - it doesn't. I'm sure a fully charged 3S Life battery would max around 12.5V ? Do we have any source for that guidance please?

Regards, Jason

Dansy

My Feedback: (53)

‘You will never see 12.5 from a 3SLife.....at least I never have all you have to do is cooling for a few second then it will start

Jason_H

Those LIFE batteries voltages are black magic to me, but I know what you mean! Not like a simple LIPO, you know when you are at 25% easily with those

makis

My Feedback: (2)

Yes, actually it doesn't. It only mentions 10.0V limit in G1 & G2 manuals. But since Kingtech recommends 3S LiFe for G4 as well, it means that all G series share the same igniters. That's my understanding.
As for the batteries, a fully charged 3S LiFe will be 10.8V and a fully charged 3S LiPo will be 12.6V. That's a serious voltage difference.......

Zeeb

My Feedback: (41)

Yeah, Dirk......

gunradd

My Feedback: (9)

At times you can get the overvoltage message on a fully charged LIFE battery. So after a charge I like to hold the throttle up a little longer during the start. This will run the starter motor manually before the start lowering the voltage for a good start.

3 cell LIFE is the only recommended battery for these engines G2 and up. Some people will use a 2 cell LIPO but that does not last as many flights and not recommended since the biggest wear on a turbine happens during start up you want the max voltage the system requires. I also would never stick a lipo in my plane anyway unless its an EDF but that's just me. I have to many scale planes that the battery's are not accessible without allot of work so they must be charged in the plane.