Nov
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A test to see if two motors will run on one large ESC 2.2 Kgs of static thrust @ 35 Amps both motors in parallel
dtb850, efficiency, power test, Torque Effect, twin Comments Off on A test to see if two motors will run on one large ESC 2.2 Kgs of static thrust @ 35 Amps both motors in parallel
A test to see if two motors will run on one ESC 2.2 Kgs of static thrust at 35 Amps both motors in parallel. Speed control was good
Results 2.2 Kgs of static thrust @ 35 Amps both motors in parallel 387 Watts total on a Turnigy 2200mAh 3C
Efficiency @ 387 Watts Thrust/Power = 5.75 Grams/Watt
A single 850 delivered 1.4 Kgs for 22.4 Amps 235 Watts swinging a 11 X 4.7 on a 3C Thrust/Power = 6 Grams/Watt
You would expect better efficiency as the static losses double in a twin installation.
That said at 1.4 Kgs the efficiency is 6.7 Grams/Watt for the twin @ 17.9 A vs 6 Grams/Watt for the single motor, almost 12% better @ 22.4 A
and again at 1Kg the twin is 7.66 Grams/Watt @ 10.2 A vs 7.07 Grams/Watt for the single 8.3% better @ 11.6A
Twin D4023-850's driving 10 X 4.7 Slow fliers on a single Hobbyking SS Series 90-100A ESC all up weight motors, props, ESC including rig 322 Grams
The Setup
Hobbyking SS Series 90-100A ESC
Weight: 85g
Size: 70x50x13mm
Cells: 2-7S Li Po
Max Current: 90A [over 70A use 6S only]
Burst : 100A
No BEC
Timing: 1/7/15/30 programmable
PWM: 8/16K
Two D4023-850 Out Runner Motor
Rpm/V: 850kv
Max Watts: 380W
Max Amps: 35A
Max Volt: 7.4~14.8v (2~4S)
Idle Current: 1.5A
Resistance: 0.039 ohms
Weight: 107.1g
