Tools // Component Selector // iFlight
iFlight 2809 KV1250
hobby fpv brushless motor. Specs read from manufacturer page ↗.
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Specifications
| Brand | iFlight |
|---|---|
| Model | 2809 |
| Variant | KV1250 |
| KV | 1,250 |
| Stator | 2809 |
| Weight | 61 g |
| Max thrust | 2,951 g |
| Max current | 25.6 A |
| Max power | 610 W |
| Peak power | 1,018 W |
| Winding resistance | 0.127 Ω |
| Poles | 12 |
| Shaft diameter | 5.0 mm |
| Hover efficiency | 5.01 g/W |
| Peak-throttle efficiency | 2.90 g/W |
| Grade | hobby |
| Application | fpv |
| Data confidence | reported |
| Thrust basis | measured |
| Efficiency basis | measured |
| Measured test points | 6 |
Measured thrust curve
Where to buy
| Vendor | Price | As listed | Stock | Lead days | |
|---|---|---|---|---|---|
| DrUAV CN | A$31.98 | USD 89.00 4-pack | backorder | 48 | buy ↗ |
| DrUAV CN | A$37.36 | USD 26.00 | backorder | 48 | buy ↗ |
| DrUAV CN | A$64.31 | USD 179.00 4-pack | backorder | 48 | buy ↗ |
| DrUAV CN | A$66.97 | USD 186.41 4-pack | backorder | 48 | buy ↗ |
| Pyrodrone US | A$67.53 | USD 46.99 | in stock | 14 | buy ↗ |
| DrUAV CN | A$71.49 | USD 199.00 4-pack | backorder | 48 | buy ↗ |
| DrUAV CN | A$73.29 | USD 51.00 | backorder | 48 | buy ↗ |
| DrUAV CN | A$81.39 | USD 56.64 | backorder | 48 | buy ↗ |
| DrUAV CN | A$81.91 | USD 57.00 | backorder | 48 | buy ↗ |
Multi-pack listings are shown at their per-unit price so they stay comparable.
Thrust test points
| Propeller | Cells | Thrust g | g/W | Basis |
|---|---|---|---|---|
| unspecified | — | 2,951 | 2.90 | measured |
| unspecified | — | 2,535 | 2.99 | measured |
| unspecified | — | 2,116 | 3.24 | measured |
| unspecified | — | 1,958 | 3.55 | measured |
| unspecified | — | 1,651 | 4.04 | measured |
| unspecified | — | 1,483 | 5.01 | measured |
Compatible accessories
Parts this catalogue holds that fit this component, and the evidence behind each pairing. Fit is inferred from published specifications, not from having tried it. Confirm mounting and clearance before you buy.
rule of thumb The size conventionally run on a stator this big. Not a measurement -- check clearance and current draw before flying it.
| Accessory | Type | From |
|---|---|---|
| Gemfan 7x4 3-blade propeller | propeller | A$1.79 |
| Gemfan 7x5 propeller | propeller | A$3.70 |
| APC Propellers 7x5 propeller | propeller | A$4.47 |
| Phaserfpv 7x4 3-blade propeller | propeller | A$4.95 |
| HQProp 7x4 propeller | propeller | A$4.95 |
| APC Propellers 7x3 propeller | propeller | A$4.98 |
| DALprop 7x4 2-blade propeller | propeller | A$5.73 |
| HQProp 7x4.5 2-blade propeller | propeller | A$5.73 |
| Gemfan 7.1x4 3-blade propeller | propeller | A$5.95 |
| Gemfan 7x3.5 2-blade propeller | propeller | A$5.95 |
| Gemfan 7x4.2 2-blade propeller | propeller | A$5.95 |
| APC Propellers 7x3.8 propeller | propeller | A$5.98 |
CAD model
No CAD model linked yet.
How the metrics are calculated
TWR is max thrust divided by motor weight, motor only, static, excluding propeller and ESC. EFTWR scales that by hover efficiency and RPM headroom, so it equals TWR for a motor at 8 g/W and 10,000 RPM. Full methodology and the whole catalogue →