Emax LS2207 2550kv

Tested KV: 2490kv
Weight: 32.9g
Stator: 22mm x 7mm

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
HQ 5x4GF1350 1346 174.68 36.15 15.40 16.11 34423 32467 33047 557 2.4
Lumenier 5x4.51447 1438 175.57 39.59 15.36 16.13 33613 31746 32198 608 2.4
DAL Cyclone 5x4x31455 1440 165.68 40.11 15.38 16.13 33613 31628 32082 617 2.3
HQ v1s 5x4x31472 1453 165.31 38.19 15.40 16.14 34149 32102 32571 588 2.5
GemFan 5x4.5HBN1469 1458 172.15 39.28 15.37 16.13 33613 31746 32295 604 2.4
HQ v1s 5x4x4PC1496 1482 166.07 41.12 15.33 16.14 32467 31055 31513 630 2.4
MyWing 5x4.5x31540 1528 176.58 44.92 15.27 16.14 32102 30181 30682 686 2.2
HQ v1s 5x4.3x3PC1551 1530 152.89 42.98 15.30 16.13 32223 30721 31158 658 2.3
HQ 5x4x3GF1563 1543 175.57 43.23 15.30 16.14 32102 30721 31179 661 2.3
DAL Cyclone 5x4.5x31570 1555 182.15 45.16 15.28 16.14 32223 30181 30774 690 2.3
DAL 5x4.5x3HBN1606 1585 182.04 47.63 15.23 16.15 31055 29254 29918 725 2.2
HQ v1s 5x4.8x31629 1617 173.41 47.64 15.24 16.14 31055 29354 29952 726 2.2
Lumenier Buttercutter 5x5x31637 1618 166.57 48.50 15.22 16.15 31055 29055 29746 738 2.2
DAL Cyclone 5x4.6x31640 1623 196.47 50.14 15.19 16.15 30181 28763 29337 762 2.1
HQ 5x4x41681 1667 163.28 50.87 15.17 16.14 29970 28666 29117 772 2.2
75% Thrust (g) Amps Volts RPMs Watts G/W
HQ 5x4GF85819.3315.72267733042.8
Lumenier 5x4.593421.5015.73262563382.8
DAL Cyclone 5x4x394521.8915.73260293442.7
GemFan 5x4.5HBN94621.5215.73261573382.8
HQ v1s 5x4x394621.0815.75262433322.8
HQ v1s 5x4x4PC99023.1315.69256523632.7
HQ 5x4x3GF100423.3515.70256633672.7
HQ v1s 5x4.3x3PC101223.7915.69254863732.7
DAL Cyclone 5x4.5x3102924.5015.69253943852.7
MyWing 5x4.5x3106125.8315.65249264042.6
Lumenier Buttercutter 5x5x3108225.6015.67249964012.7
DAL 5x4.5x3HBN108426.3315.65248054122.6
HQ v1s 5x4.8x3109626.1515.66248164092.7
DAL Cyclone 5x4.6x3110827.0715.65245324242.6
HQ 5x4x4113328.0015.62243904372.6
50% Thrust (g) Amps Volts RPMs Watts G/W
HQ 5x4GF4458.8015.93193441403.2
DAL Cyclone 5x4x34899.5915.96190911533.2
Lumenier 5x4.54949.5715.96190461533.2
GemFan 5x4.5HBN4999.5915.96190831533.3
HQ v1s 5x4x35009.5015.97191261523.3
HQ v1s 5x4x4PC52810.3415.94187011653.2
HQ v1s 5x4.3x3PC53510.4715.94186031673.2
HQ 5x4x3GF54010.3315.95187121653.3
DAL Cyclone 5x4.5x354510.6615.95186661703.2
Lumenier Buttercutter 5x5x357210.8815.95185051733.3
HQ v1s 5x4.8x357411.2015.94181631793.2
DAL 5x4.5x3HBN57711.3115.94181631803.2
DAL Cyclone 5x4.6x358311.4215.95182191823.2
MyWing 5x4.5x358711.6415.92180981853.2
HQ 5x4x460511.9715.93179691913.2
25% Thrust (g) Amps Volts RPMs Watts G/W
HQ 5x4GF1492.9916.0511165483.1
DAL Cyclone 5x4x31563.1916.0811164513.0
HQ v1s 5x4x31613.1716.0911153513.2
Lumenier 5x4.51643.1916.0811139513.2
GemFan 5x4.5HBN1713.2716.0811100533.2
HQ v1s 5x4x4PC1793.4116.0710984553.3
HQ v1s 5x4.3x3PC1813.4316.0811011553.3
DAL Cyclone 5x4.5x31833.4316.0811016553.3
HQ 5x4x3GF1893.4816.0811025563.4
Lumenier Buttercutter 5x5x31913.4316.0811024553.5
HQ v1s 5x4.8x31993.5916.0810887583.4
DAL Cyclone 5x4.6x32003.5816.0910896583.5
DAL 5x4.5x3HBN2013.6016.0810866583.5
MyWing 5x4.5x32133.8116.0710764613.5
HQ 5x4x42233.8216.0810728613.6
IDLE Thrust (g) Amps Volts RPMs Watts G/W
DAL Cyclone 5x4x3391.4216.115877231.7
HQ 5x4GF401.3416.085825221.9
HQ v1s 5x4x3401.3916.125869221.8
Lumenier 5x4.5421.4016.115857231.9
GemFan 5x4.5HBN451.4216.115854232.0
HQ v1s 5x4x4PC461.5016.105821241.9
HQ v1s 5x4.3x3PC461.3916.115800222.0
DAL Cyclone 5x4.5x3481.4716.125833242.0
Lumenier Buttercutter 5x5x3481.4216.125829232.1
DAL Cyclone 5x4.6x3511.4816.125793242.2
HQ v1s 5x4.8x3511.4816.125785242.2
HQ 5x4x3GF521.4616.115809232.2
DAL 5x4.5x3HBN531.4816.115804242.2
MyWing 5x4.5x3571.5416.115756252.3
HQ 5x4x4611.5316.125753252.5