T-Motor F1408-II 1408

T-Motor F1408-II 1408
Image: racedayquads.com
Stator1408
KV options2800, 3950
Weight14.95 g
Shaft1.5mm
Max cells3-6S
Configuration9N12P
Dimensions17.9x20.2 mm
Mount12x12mm
Winding resistance141 (2800KV) / 88 (3950KV) mOhm
Max thrust734.72 g
Price (approx.)18.89 USD

Thrust data (T-Motor bench test)

KVPropBatteryThrottleCurrentRPMThrustEfficiency
2800 Gemfan GF3028-3 4S 50 2.13 A 19940 122.98 g 3.43 g/W
2800 Gemfan GF3028-3 4S 55 2.59 A 21657 146.82 g 3.37 g/W
2800 Gemfan GF3028-3 4S 60 3.09 A 23394 171.9 g 3.31 g/W
2800 Gemfan GF3028-3 4S 65 3.62 A 24943 195.85 g 3.22 g/W
2800 Gemfan GF3028-3 4S 70 4.13 A 26435 219.75 g 3.17 g/W
2800 Gemfan GF3028-3 4S 75 4.68 A 27893 244.27 g 3.1 g/W
2800 Gemfan GF3028-3 4S 80 5.31 A 29306 271.05 g 3.04 g/W
2800 Gemfan GF3028-3 4S 85 5.99 A 30655 298.03 g 2.96 g/W
2800 Gemfan GF3028-3 4S 90 6.74 A 32100 324.42 g 2.87 g/W
2800 Gemfan GF3028-3 4S 95 7.64 A 33467 355.99 g 2.78 g/W
2800 Gemfan GF3028-3 4S 100 8.63 A 34930 390.47 g 2.7 g/W
2800 Gemfan GF3028-3 5S 50 3.03 A 24022 181.3 g 2.85 g/W
2800 Gemfan GF3028-3 5S 55 3.72 A 26015 215.39 g 2.76 g/W
2800 Gemfan GF3028-3 5S 60 4.34 A 27830 243.15 g 2.67 g/W
2800 Gemfan GF3028-3 5S 65 4.93 A 29718 271.3 g 2.62 g/W
2800 Gemfan GF3028-3 5S 70 5.72 A 31615 311.37 g 2.59 g/W
2800 Gemfan GF3028-3 5S 75 6.81 A 33472 355.27 g 2.49 g/W
2800 Gemfan GF3028-3 5S 80 7.39 A 34733 390.62 g 2.52 g/W
2800 Gemfan GF3028-3 5S 85 8.24 A 36630 423.2 g 2.45 g/W
2800 Gemfan GF3028-3 5S 90 9.34 A 38321 468.34 g 2.39 g/W
2800 Gemfan GF3028-3 5S 95 10.51 A 40045 508.17 g 2.31 g/W
2800 Gemfan GF3028-3 5S 100 11.9 A 41634 557.14 g 2.24 g/W
2800 Gemfan GF3028-3 6S 50 3.68 A 26539 228.49 g 2.46 g/W
2800 Gemfan GF3028-3 6S 55 4.45 A 28559 265.84 g 2.37 g/W
2800 Gemfan GF3028-3 6S 60 5.24 A 30868 308.83 g 2.34 g/W
2800 Gemfan GF3028-3 6S 65 6.17 A 33124 356.29 g 2.29 g/W
2800 Gemfan GF3028-3 6S 70 7.22 A 35356 408.28 g 2.25 g/W
2800 Gemfan GF3028-3 6S 75 8.2 A 37334 459.62 g 2.23 g/W
2800 Gemfan GF3028-3 6S 80 9.24 A 39489 505.54 g 2.17 g/W
2800 Gemfan GF3028-3 6S 85 10.6 A 41704 562.16 g 2.11 g/W
2800 Gemfan GF3028-3 6S 90 12.12 A 43819 620.87 g 2.04 g/W
2800 Gemfan GF3028-3 6S 95 13.74 A 45600 678.78 g 1.97 g/W
2800 Gemfan GF3028-3 6S 100 15.37 A 47442 726.41 g 1.88 g/W
2800 HQProp HQ3520-3 4S 50 2.94 A 18867 177.27 g 3.58 g/W
2800 HQProp HQ3520-3 4S 55 3.57 A 20324 208.13 g 3.47 g/W
2800 HQProp HQ3520-3 4S 60 4.29 A 21796 241.57 g 3.35 g/W
2800 HQProp HQ3520-3 4S 65 5.05 A 23130 276.19 g 3.26 g/W
2800 HQProp HQ3520-3 4S 70 5.92 A 24519 309.31 g 3.11 g/W
2800 HQProp HQ3520-3 4S 75 6.69 A 25627 340.41 g 3.03 g/W
2800 HQProp HQ3520-3 4S 80 7.51 A 26720 369.35 g 2.93 g/W
2800 HQProp HQ3520-3 4S 85 8.55 A 27903 407.32 g 2.84 g/W
2800 HQProp HQ3520-3 4S 90 9.77 A 29249 448.13 g 2.74 g/W
2800 HQProp HQ3520-3 4S 95 11.04 A 30352 488.01 g 2.64 g/W
2800 HQProp HQ3520-3 4S 100 12.45 A 31361 530.92 g 2.55 g/W
2800 Gemfan GF4024-2 4S 50 3.45 A 18326 224.04 g 3.86 g/W
2800 Gemfan GF4024-2 4S 55 4.2 A 19774 258.98 g 3.67 g/W
2800 Gemfan GF4024-2 4S 60 4.96 A 20907 294.33 g 3.53 g/W
2800 Gemfan GF4024-2 4S 65 5.88 A 22179 334.04 g 3.38 g/W
2800 Gemfan GF4024-2 4S 70 6.82 A 23413 370.61 g 3.24 g/W
2800 Gemfan GF4024-2 4S 75 7.92 A 24536 410.58 g 3.09 g/W
2800 Gemfan GF4024-2 4S 80 8.9 A 25533 447.28 g 3.0 g/W
2800 Gemfan GF4024-2 4S 85 10.03 A 26566 486.78 g 2.9 g/W
2800 Gemfan GF4024-2 4S 90 11.36 A 27633 531.27 g 2.8 g/W
2800 Gemfan GF4024-2 4S 95 12.83 A 28571 576.75 g 2.69 g/W
2800 Gemfan GF4024-2 4S 100 14.38 A 29548 618.08 g 2.58 g/W
2800 Gemfan GF4023-3 4S 50 3.99 A 17429 240.37 g 3.58 g/W
2800 Gemfan GF4023-3 4S 55 4.91 A 18719 281.02 g 3.41 g/W
2800 Gemfan GF4023-3 4S 60 5.8 A 19861 316.38 g 3.25 g/W
2800 Gemfan GF4023-3 4S 65 6.8 A 20917 354.29 g 3.1 g/W
2800 Gemfan GF4023-3 4S 70 7.93 A 22006 396.44 g 2.98 g/W
2800 Gemfan GF4023-3 4S 75 9.18 A 23062 436.94 g 2.84 g/W
2800 Gemfan GF4023-3 4S 80 10.59 A 24090 477.69 g 2.7 g/W
2800 Gemfan GF4023-3 4S 85 11.82 A 24824 514.94 g 2.61 g/W
2800 Gemfan GF4023-3 4S 90 13.07 A 25680 550.73 g 2.52 g/W
2800 Gemfan GF4023-3 4S 95 14.61 A 26495 587.5 g 2.41 g/W
2800 Gemfan GF4023-3 4S 100 16.26 A 27159 625.53 g 2.31 g/W
3950 Gemfan D90-3 3S 50 5.81 A 15621 234.44 g 3.21 g/W
3950 Gemfan D90-3 3S 55 7.07 A 16794 269.39 g 3.03 g/W
3950 Gemfan D90-3 3S 60 8.39 A 17876 302.61 g 2.87 g/W
3950 Gemfan D90-3 3S 65 9.89 A 18870 339.7 g 2.74 g/W
3950 Gemfan D90-3 3S 70 11.3 A 19705 370.41 g 2.62 g/W
3950 Gemfan D90-3 3S 75 12.8 A 20576 402.81 g 2.52 g/W
3950 Gemfan D90-3 3S 80 14.39 A 21550 433.65 g 2.41 g/W
3950 Gemfan D90-3 3S 85 16.19 A 22348 466.41 g 2.31 g/W
3950 Gemfan D90-3 3S 90 17.92 A 23049 498.47 g 2.24 g/W
3950 Gemfan D90-3 3S 95 19.73 A 23802 525.44 g 2.14 g/W
3950 Gemfan D90-3 3S 100 21.8 A 24557 555.07 g 2.05 g/W
3950 HQProp HQ3520-3 3S 50 3.75 A 18412 163.82 g 3.47 g/W
3950 HQProp HQ3520-3 3S 55 4.59 A 19967 195.76 g 3.39 g/W
3950 HQProp HQ3520-3 3S 60 5.43 A 21282 224.86 g 3.29 g/W
3950 HQProp HQ3520-3 3S 65 6.32 A 22562 254.44 g 3.2 g/W
3950 HQProp HQ3520-3 3S 70 7.35 A 23778 286.47 g 3.11 g/W
3950 HQProp HQ3520-3 3S 75 8.37 A 24903 317.4 g 3.02 g/W
3950 HQProp HQ3520-3 3S 80 9.39 A 25920 348.33 g 2.96 g/W
3950 HQProp HQ3520-3 3S 85 10.59 A 27022 380.78 g 2.87 g/W
3950 HQProp HQ3520-3 3S 90 11.94 A 28178 414.34 g 2.78 g/W
3950 HQProp HQ3520-3 3S 95 13.39 A 29278 447.12 g 2.68 g/W
3950 HQProp HQ3520-3 3S 100 15.1 A 30333 485.65 g 2.58 g/W
3950 Gemfan GF4024-2 3S 50 4.57 A 17807 208.33 g 3.62 g/W
3950 Gemfan GF4024-2 3S 55 5.62 A 19243 247.07 g 3.49 g/W
3950 Gemfan GF4024-2 3S 60 6.56 A 20410 279.8 g 3.39 g/W
3950 Gemfan GF4024-2 3S 65 7.56 A 21556 311.22 g 3.28 g/W
3950 Gemfan GF4024-2 3S 70 8.77 A 22673 348.18 g 3.17 g/W
3950 Gemfan GF4024-2 3S 75 10.16 A 23794 389.88 g 3.06 g/W
3950 Gemfan GF4024-2 3S 80 11.3 A 24876 415.74 g 2.94 g/W
3950 Gemfan GF4024-2 3S 85 12.59 A 25742 448.93 g 2.85 g/W
3950 Gemfan GF4024-2 3S 90 14.34 A 26839 495.82 g 2.77 g/W
3950 Gemfan GF4024-2 3S 95 16.21 A 27704 540.57 g 2.68 g/W
3950 Gemfan GF4024-2 3S 100 18.1 A 28675 581.02 g 2.58 g/W
3950 Gemfan GF4023-3 3S 50 5.27 A 17002 230.59 g 3.48 g/W
3950 Gemfan GF4023-3 3S 55 6.32 A 18190 264.53 g 3.33 g/W
3950 Gemfan GF4023-3 3S 60 7.55 A 19333 302.78 g 3.19 g/W
3950 Gemfan GF4023-3 3S 65 8.73 A 20346 334.75 g 3.06 g/W
3950 Gemfan GF4023-3 3S 70 10.16 A 21385 374.49 g 2.94 g/W
3950 Gemfan GF4023-3 3S 75 11.63 A 22316 409.7 g 2.82 g/W
3950 Gemfan GF4023-3 3S 80 13.31 A 23313 450.53 g 2.71 g/W
3950 Gemfan GF4023-3 3S 85 15.02 A 24155 486.86 g 2.6 g/W
3950 Gemfan GF4023-3 3S 90 16.71 A 24912 521.73 g 2.51 g/W
3950 Gemfan GF4023-3 3S 95 18.61 A 25742 554.88 g 2.4 g/W
3950 Gemfan GF4023-3 3S 100 20.76 A 26503 592.73 g 2.3 g/W
3950 Gemfan GF3028-3 4S 50 4.35 A 25096 195.41 g 2.68 g/W
3950 Gemfan GF3028-3 4S 55 5.11 A 26864 225.45 g 2.63 g/W
3950 Gemfan GF3028-3 4S 60 5.98 A 28844 261.67 g 2.61 g/W
3950 Gemfan GF3028-3 4S 65 6.94 A 30857 297.6 g 2.56 g/W
3950 Gemfan GF3028-3 4S 70 7.95 A 32701 334.91 g 2.52 g/W
3950 Gemfan GF3028-3 4S 75 9.05 A 34346 374.08 g 2.47 g/W
3950 Gemfan GF3028-3 4S 80 10.03 A 35940 407.01 g 2.43 g/W
3950 Gemfan GF3028-3 4S 85 11.11 A 37521 442.03 g 2.38 g/W
3950 Gemfan GF3028-3 4S 90 12.49 A 39124 482.38 g 2.31 g/W
3950 Gemfan GF3028-3 4S 95 14.1 A 40671 528.33 g 2.25 g/W
3950 Gemfan GF3028-3 4S 100 15.84 A 42314 571.67 g 2.17 g/W
3950 HQProp HQ3520-3 4S 50 5.79 A 23251 274.53 g 2.83 g/W
3950 HQProp HQ3520-3 4S 55 7.11 A 24945 320.31 g 2.69 g/W
3950 HQProp HQ3520-3 4S 60 8.38 A 26284 360.43 g 2.57 g/W
3950 HQProp HQ3520-3 4S 65 9.57 A 27884 399.25 g 2.5 g/W
3950 HQProp HQ3520-3 4S 70 10.88 A 29064 442.97 g 2.44 g/W
3950 HQProp HQ3520-3 4S 75 12.39 A 30426 488.57 g 2.37 g/W
3950 HQProp HQ3520-3 4S 80 14.09 A 31687 538.8 g 2.3 g/W
3950 HQProp HQ3520-3 4S 85 15.9 A 32921 585.61 g 2.21 g/W
3950 HQProp HQ3520-3 4S 90 17.8 A 34186 629.15 g 2.13 g/W
3950 HQProp HQ3520-3 4S 95 19.93 A 35270 680.29 g 2.06 g/W
3950 HQProp HQ3520-3 4S 100 22.42 A 36236 734.72 g 1.98 g/W

Manufacturer bench figures (T-Motor bench, twelve runs across two KV: at 2800 KV Gemfan GF3028-3 on 4S, 5S and 6S (~16.8 / 21.0 / 25.2 V) and HQProp HQ3520-3, Gemfan GF4024-2 and Gemfan GF4023-3 on 4S; at 3950 KV Gemfan D90-3, HQProp HQ3520-3, Gemfan GF4024-2 and Gemfan GF4023-3 on 3S (~12.6 V) and Gemfan GF3028-3 and HQProp HQ3520-3 on 4S; 11 throttle points (50-100% in 5% steps) on each run); 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 4022F 2-Blade 4.0x2.2 2 0.37 g
Gemfan Hurricane 3018 Durable 1.5mm 3.0x1.8 2 0.75 g
Gemfan Hurricane 3018 Durable 2mm 3.0x1.8 2 0.75 g
HQProp T3x1.5 Durable 3.0x1.5 2 0.78 g
HQProp T3.5x2.2x2 3.5x2.2 2 1.1 g

Where this data comes from

Bench rows, the 2800 KV winding and the winding resistances are from T-Motor's own F1408-II page on its store t-hobby.com (Product Drawing, Specifications and Test Report images, read 2026-10-17 through the local browser because the site sits behind a Cloudflare check). The RaceDayQuads listing carries the same report but its last image is cut off by the uploader after the first data row, which is why this page was rowless; that row (50%, 122.98 g, 16.83 V) is the 2800 KV Gemfan GF3028-3 4S run's first. Identity with the listing: 9N12P, a Ø17.9x20.2 mm body, 88 mΩ and 14.95 g including cable for the 3950 KV - the block's KV3950 column to the digit (12.75 g without cable). kv_options goes from 1 to 2: the same block carries KV2800 (141 mΩ, rated 4-6S, 0.62 A idle at 10 V, 14.9 g / 12.7 g) on the same body and lead, and the report benches both, so max_cells reads 3-6S across the two windings: T-Motor rates the 3950 KV 3-4S and the 2800 KV 4-6S, and the table benches each only inside its own range. Max thrust is the 3950 KV HQProp HQ3520-3 4S 100% row, 734.72 g, the figure T-Motor's own banner rounds to 734 g. All 132 rows reproduce the printed power as voltage x current and the printed efficiency as thrust / power. The block's 60-second figures are report rows: 3950 KV 371 W / 22.4 A is the HQ3520-3 4S 100% row (371.05 W, 22.42 A) and 2800 KV 385 W / 15.3 A the GF3028-3 6S 100% row (385.63 W, 15.37 A) - though the 2800 KV GF4023-3 4S run peaks higher in current (16.26 A at 271.05 W), so its "Peak Current" is the maximum-power run's current, not the highest current benched. Source facts recorded rather than repaired. The sheet's motor temperatures, which its note defines as surface temperature at 100% throttle after 1 minute (ambient 19 °C), are 62 / 71 / 80 °C on the 2800 KV GF3028-3 at 4S / 5S / 6S, 69 on HQ3520-3, 74 on the 4024 two-blade and 75 on GF4023-3; on the 3950 KV, 72 on Gemfan D90-3, 60 on HQ3520-3 3S, 65 on GF4024-2, 67 on GF4023-3, 74 on GF3028-3 4S and 81 on HQ3520-3 4S. Prop names are the sheet's except two: it writes the ducted prop "GFD90-3" (Gemfan D90-3 here) and the 2800 KV two-blade "GF4042-2", taken as a transposition of the GF4024-2 that the 3950 KV half of the same sheet benches. The block prints a 2 mm shaft for both windings; the drawing dimensions it Ø1.5, as RaceDayQuads lists it, so the shaft stays 1.5mm. The drawing puts the four M2 mounting holes on a Ø12 circle (bottom: 4-M2 on Ø5); the 12x12mm this page shows is RaceDayQuads' figure and is left as the retailer prints it, the same reading as T-Motor's F50 drawing

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