hb

is my thunderpower lipo 2100 3s pack too heavy for my eflite ultimate. I bought the upgrade 370 brushless with a 25amp speed controller plus the lipo 2100 I am using the stock gear box and prop
will my ultimate pull out of a hover with the 2100 pack.


help appreciated. New at electrics

Jason W M

My Feedback: (6)

While the Ultimate would indeed fly, hover and pull out vertically on the 3S 2100 pack, it is a bit too much weight and could impact the handling of the Ultimate significantly.

The best choice of battery is the Thunder Power 1320-3S pack. Still tons of power with the Park 370 motor, and easily handles the 13-15 amp max draw. My flight times were typically 15-20 minutes using the Park 370 4100 motor (dont use the Park 370 5400 motor with the 3S packs), stock gearbox (6.6:1 ratio), 12x6 prop and Castle Creations ESC.

If youre also using the Castle Creations ESC, be sure to program the Low Voltage Cut Off to 9v when using a 3S pack. The manual for the ESC says to use 7.2v which is incorrect - flying this low will damage the pack. The 9v setting is available, but you must program it into the ESC. Id would also suggest programming the ESC for a Soft Cut Off and turn the Brake Off completely (same setting used for helis) to help save the gearbox. All other settings can remain default on the ESC.

Good luck!

Foamaholic

My Feedback: (1)

I tried them in my 3DX and it flew ok, just felt more sluggish, but could still pull out of a hover.
I prefer the Etec 1200 for the less weight.
I thinkk the 1200 weighs 3 oz. and the 2100 weighs 5 oz.

hb

lvrcflyer why shouldn't i use the 3s pack with the 370 brushless will it be too much

thanks for the programing tips you saved my alot of trouble

Peter Khor

My Feedback: (4)

TP2100 3s, Eflite 400 brushless motor (not the 370) in a 3DX and Ultimate, lots of ooomph.

woodduck-RCU

I agree with Peter about the eFlite brushless 400 and the 3 cell 2100 lipo.
Absolutely vertical!!! Mine actually has elevator flutter going vertical.
The 1320 is a more realistic pack.
Woodduck

Jason W M

My Feedback: (6)

Actually, the 1320 pack I recomended is also 3S.

The reason I suggest the 3S 1320 pack over the 3S 2100 pack is due to weight. Too high of a wing loading may impact the slow flight capabilities of the model. While tons of power is great, youll have near the same power to weight ratio with the 1320 pack, at a lower wing loading.

You can most definitel fly with the 2100 pack, but the 1320 pack will allow you to really slow the model down for various 3D manuevers. In fact, for no wind to light wind days, I even like to fly the 3S 860 packs in the Ultimate - the extremely low wing loading with these packs allows for some very snappy "in your face" performance!

hb

Thanks for all of the info guys i have the bipe put together and ready to go. Thanks for all the tips lvrcflyer and yes i have the castle creations phoenix 25 great help on the programming tips. i'll let you all know how it goes.

thanks for all of te tips.