Rotaro Mjolnir 2308 2500kv

Tested KV: 2580kv
Weight: 38g
Stator: 24mm x 8mm

Test Environment:

XRotor 40A ESC
Timing: Med-high
Dither: 7
PWM: Damped Light

Venom 60A Power Supply
2Farad Caps x2 in Series

Custom Datalogger

TI TivaC Launchpad
Allegro ACS758-200B
Voltage Divider
EagleTree eRPM Sensor
Custom Thrust Stand w/ HX711
4 ms logging rate

Atmospheric Data (Typical)

Barometric pressure: 29-30 in
Ambient Temperature: 70-74 deg F
Humidity: 50-60%
100% Thrust (g) Current (A) Voltage High RPM Pass Efficiency
Prop Tested: Max(g) Avg Max(g)* Max (A) Avg Max(A)* Avg Min(V)* Max(V) Max Min Avg Max* Watts G/W
APC Electric 5x3E995 988 174.17 35.74 15.31 16.05 36166 34702 35209 547 1.8
HQ 5x4GF1318 1309 185.98 35.49 15.32 16.05 37105 34702 35263 544 2.4
HQ v1s 5x4x31436 1414 184.58 36.40 15.32 16.07 36166 34702 35207 558 2.5
GemFan 5x4.5HBN1449 1441 187.27 38.19 15.27 16.07 35714 34285 34764 583 2.5
Lumenier 5x4.51498 1487 208.33 40.29 15.20 16.04 35128 33745 34162 612 2.4
HQ v1s 5x4x4PC1498 1490 199.09 41.14 15.22 16.07 34985 33482 34106 626 2.4
HQ 5x4x3GF1590 1571 191.13 43.41 15.17 16.07 34562 33222 33605 659 2.4
75% Thrust (g) Amps Volts RPMs Watts G/W
APC Electric 5x3E63617.6615.68286762772.3
HQ 5x4GF83518.5915.63283772912.9
HQ v1s 5x4x392320.1015.65281223152.9
GemFan 5x4.5HBN93420.8715.63278873262.9
Lumenier 5x4.594721.0715.60277583292.9
HQ v1s 5x4x4PC100423.1815.59273183612.8
HQ 5x4x3GF101522.9815.60274263592.8
50% Thrust (g) Amps Volts RPMs Watts G/W
APC Electric 5x3E3467.5715.88210471202.9
HQ 5x4GF4378.7215.85206291383.2
HQ v1s 5x4x34979.6215.87204361533.3
Lumenier 5x4.55009.3615.84203621483.4
GemFan 5x4.5HBN5049.8115.86203271563.2
HQ v1s 5x4x4PC54510.7915.85199761713.2
HQ 5x4x3GF54810.5315.85200531673.3
25% Thrust (g) Amps Volts RPMs Watts G/W
APC Electric 5x3E1132.1616.0011994353.3
HQ 5x4GF1442.9015.9811818463.1
HQ v1s 5x4x31623.0316.0011748493.3
Lumenier 5x4.51622.6915.9811784433.8
GemFan 5x4.5HBN1703.1116.0011726503.4
HQ v1s 5x4x4PC1813.2616.0011677523.5
HQ 5x4x3GF1873.2316.0011667523.6
IDLE Thrust (g) Amps Volts RPMs Watts G/W
APC Electric 5x3E250.6016.026177102.6
HQ 5x4GF381.0816.026118172.2
Lumenier 5x4.5390.7216.026077123.4
HQ v1s 5x4x3401.0616.046099172.3
GemFan 5x4.5HBN441.1116.036113182.5
HQ v1s 5x4x4PC451.0716.046081172.6
HQ 5x4x3GF511.0916.046087172.9