nick_cool

I was metering a couple of Polyquest 2200XF packs (45C discharge / 5C charge), and here are the results. I used two platforms, a 1,2m Yak 54 and a 1 m Pitts Challenger, no of them challenge the packs to the limit, but both are real and common applications.

Please note that I took the readings after 10 flights, and in the middle of the discharge, not in land during the first minute when the pack gives noticeable more voltage. Figures taken in land before take off at full charge are “too good” i.e. not much realistic.

The packs are 40mm x 35mm x 116mm and weight around 270g

First test: Yak 54 (1,2m@1,2Kg)

This plane has more than 180 flights done, so I know it well. With the new lipos is seems to recover the vitality lost by my old lipos. The power is enough to climb vertically at 80% of the throttle.

Motor: SK35-36 (110g, 910 rpm / V)
ESC: 60A, U-BEC
Lipo Pack: Polyquest PQ-2200XF (2200mA; 45C, 274g)
Propeller: 12x6 APC-E
RPM: 8.800 rpm
Voltage under load: 14,2 V
Current peak: 32 A
Input Power: 450 W

Bellow is the current Vs. voltage curves, as well as the RPM vs Power curves. The packs passed from 25°C to 35°C in a hard 7 minutes flight.

Second test: Pitts Challenger (1m@1,2Kg)

I still have some respect for this model (it is so beautiful!), so it was tested in sport flight only.

Motor: Scorpion 3014-22 (122g, 892 rpm / V)
ESC: 40A, U-BEC
Lipo Pack: Polyquest PQ-2200XF (2200mA; 45C, 274g)
Propeller: 11x5,5 APC-E
RPM: 10.400 rpm
Voltage under load: 14 V
Current peak: 33 A
Input Power: 456 W

I can notice that this pack under consumption gives average 0,2V per cell more than the old ones (here is where the 45C efficiency can be seen), so now the motor is almost in the power limit. I also pushed them at 48Amps (22C) and they keep their output over 14V.

Note that nevertheless both motors are very similar; the Scorpion seems to be hotter than the SK and more efficient too, i.e. both give the same power but the prop used in the SK is 1” bigger.

I charged them always at 2C (4,4A), it took 30 minutes and its balance was never lost. So, 2 packs are enough to flight virtually continuously, resting only 10 or 15 minutes between flights. The charge was always started 10 minutes after flight, because the arrived almost cold. Notice that at least a 70W charger is needed to do so.

Good landings!

crazyflyboy30

I like your testing I do a lot of testing myself now I testing a TPOWER 2250 3s 30c/5c it is awesome if the 30c is good I need to get a 45c/6c to test out .