Flash Hobby King 2207.5

Stator	2207.5
KV options	1900, 2500
Weight	36.0 g
Shaft	5mm
Max cells	3-6S (1900KV) / 2-4S (2500KV)
Configuration	12N14P
Mount	16x16mm (M3)
Max thrust	1479 g
Price (approx.)	19.49 USD

At 36 g it is 2.8 g heavier than average across the 39 2207-class motors in our database (avg 33.2 g).

Thrust data (Flash Hobby bench test)

KV	Prop	Battery	Throttle	Current	RPM	Thrust	Efficiency
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.

King 2207.5 vs other 2207 motors on 6S

The same thrust costs different power on different motors. Each line is one maker's own bench series (6S, its own prop), drawn as grams of thrust per watt against thrust, so a higher line makes that thrust for less battery current. Throttle percent is left out on purpose: it means something different on every maker's rig.

Motor	KV	Prop	Peak thrust	At 1450 g
Flash Hobby King 2207.5	1900	GF 5047 3R	1479 g at 831 W	807 W (1.8 g/W)
EMAX E3 Series 2207	1900	EMAX AVAN 5026-3	1800 g at 1023 W	733 W (1.98 g/W)
EMAX ECO II Series 2207	1900	DALPROP Cyclone 5046	2020 g at 1023 W	678 W (2.14 g/W)
RDQ Badass 2 2207.5	1900	GF6040 2R	2058 g at 1037 W	563 W (2.57 g/W)
T-Motor F60 Pro IV V2 2207.5	1950	T-Motor T5150 Tri-Blade	1838 g at 950 W	659 W (2.2 g/W)
T-Motor Pacer V3.2 2207	1950	T-Motor T5143S-3	1815 g at 1114 W	773 W (1.87 g/W)

Power at 1450 g is read off each maker's curve, straight-line between its two nearest bench points; 1450 g is the highest thrust every motor here reached. Different props and rigs move these curves as much as the motor does, so compare rows on a similar prop. Peak thrust of every 2207 motor: 2207 motors compared. How to read a bench table: reading motor bench tables.

Thrust-to-weight with this motor

Four Flash Hobby King 2207.5 motors at 1479 g max thrust each give 5916 g: 2:1, the minimum to fly, up to 2958 g all-up; 4:1 (freestyle) up to 1479 g; 8:1 (racing) up to 739.5 g.

RPM & prop speed on this motor

Props in this motor's class

Prop	Size	Blades	Weight
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.