Flash Hobby King 2207.5

Flash Hobby King 2207.5
Image: racedayquads.com
Stator2207.5
KV options1900, 2500
Weight36.0 g
Shaft5mm
Max cells2-4S
Configuration12N14P
Mount16x16mm (M3)
Max thrust1479 g
Price (approx.)19.49 USD

At 36 g it is 2.9 g heavier than average across the 40 2207-class motors in our database (avg 33.1 g).

Thrust data (Flash Hobby bench test)

KVPropBatteryThrottleCurrentRPMThrustEfficiency
1900 GF 5040 2R 6S 50 6.22 A — 515 g 3.46 g/W
1900 GF 5040 2R 6S 60 10.47 A — 726 g 2.9 g/W
1900 GF 5040 2R 6S 70 15.49 A — 947 g 2.57 g/W
1900 GF 5040 2R 6S 80 22.05 A — 1211 g 2.32 g/W
1900 GF 5040 2R 6S 90 28.4 A — 1411 g 2.11 g/W
1900 GF 5040 2R 6S 100 28.4 A — 1406 g 2.1 g/W
1900 GF 5047 3R 6S 50 7.7 A — 577 g 3.17 g/W
1900 GF 5047 3R 6S 60 12.97 A — 817 g 2.68 g/W
1900 GF 5047 3R 6S 70 18.6 A — 1012 g 2.32 g/W
1900 GF 5047 3R 6S 80 26.1 A — 1267 g 2.1 g/W
1900 GF 5047 3R 6S 90 35.83 A — 1479 g 1.78 g/W
1900 GF 5047 3R 6S 100 35.43 A — 1462 g 1.78 g/W

Manufacturer bench figures (Flash Hobby bench, 1900 KV winding only, two 5in props at 23.1-23.9 V (6S), 50-100% throttle in 10% steps; no RPM published); real-world thrust varies with ESC, battery sag and prop condition.

Thrust-to-weight with this motor

RPM & prop speed on this motor

Props in this motor's class

PropSizeBladesWeight
Gemfan Long Range 5126-2 Durable 1.5mm T-Mount 5.1x2.7 2 2.6 g
HQProp DP 5.1x2.5x3 5.1x2.5 3 3.1 g
HQProp Juicy J37 4.9x3.7 3 3.4 g
HQProp Juicy J40 5.1x4.0 3 3.4 g
Gemfan 4935 Sbang 3-Blade 4.9x3.5 3 3.45 g

Where this data comes from

Bench rows are Flash Hobby's own test table, headed "K2207.5 1900KV" on both of its runs, published as the same description image on both of this page's retail listings - so the 2500 KV listing reprints the 1900 KV sheet, and this page's 2500 KV winding has no rows. Every row is its own printed volts x its own printed amps to 0.05 W. Two figures are recorded rather than repaired: the GF5040 2R run prints the same 28.4 A at 90% and 100% and a full-throttle thrust (1406 g) below its own 90% row (1411 g), and the GF5047 3R run does the same (35.43 A and 1462 g against 35.83 A and 1479 g); in both the printed efficiency follows the printed power, so this is what the sheet says. Neither listing's "Max Pull" lands on the table - 1619 g on the 1900 KV listing and 1513 g on the 2500 KV one, against a table maximum of 1479 g - so the blocks are describing a run this sheet does not publish. The page's max_cells is the 2500 KV listing's 2-4S while the 1900 KV listing states 3-6S, which is what this ~23.5 V sheet runs: the field is per-motor and the two windings differ. Operating temperature: 54.5 degC on the GF5040 2R run, 67.4 degC on the GF5047 3R run.

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