Tools // Component Selector // EMAX
EMAX 2807 ECO II KV1700
hobby fpv brushless motor. Specs read from manufacturer page ↗.
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Specifications
| Brand | EMAX |
|---|---|
| Model | 2807 |
| Variant | ECO II KV1700 |
| KV | 1,700 |
| Stator | 2807 |
| Weight | 48 g |
| Max thrust | 2,100 g |
| Test propeller | HQ 7x4x3 |
| Test cells | 4S |
| Max current | 52.0 A |
| Max power | 870 W |
| Peak power | 861 W |
| No-load current | 2.10 A |
| Winding resistance | 0.041 Ω |
| Poles | 14 |
| Shaft diameter | 4.0 mm |
| Body diameter | 33.9 mm |
| Body height | 34.0 mm |
| Max RPM | 13,800 |
| Hover efficiency | 3.24 g/W |
| Peak-throttle efficiency | 2.44 g/W |
| Grade | hobby |
| Application | fpv |
| Data confidence | verified |
| Thrust basis | measured |
| Efficiency basis | measured |
| Measured test points | 1 |
Where to buy
| Vendor | Price | As listed | Stock | Lead days | |
|---|---|---|---|---|---|
| DrUAV CN | A$17.25 | USD 48.03 4-pack | backorder | 48 | buy ↗ |
| Pyrodrone US | A$28.01 | USD 19.49 | backorder | 44 | buy ↗ |
| DrUAV CN | A$29.27 | USD 81.49 4-pack | backorder | 48 | buy ↗ |
| Phaser FPV AU | A$29.95 | AUD 29.95 | in stock | 3 | buy ↗ |
| DrUAV CN | A$33.12 | USD 92.19 4-pack | backorder | 48 | buy ↗ |
| Phaser FPV AU | A$33.95 | AUD 33.95 | backorder | 33 | buy ↗ |
| Pyrodrone US | A$34.47 | USD 23.99 | in stock | 14 | buy ↗ |
| DrUAV CN | A$37.10 | USD 103.26 4-pack | backorder | 48 | buy ↗ |
| DrUAV CN | A$37.37 | USD 104.02 4-pack | backorder | 48 | buy ↗ |
| DrUAV CN | A$40.35 | USD 56.16 2-pack | backorder | 48 | buy ↗ |
| DrUAV CN | A$42.62 | USD 29.66 | backorder | 48 | buy ↗ |
| DrUAV CN | A$47.80 | USD 33.26 | backorder | 48 | buy ↗ |
| DrUAV CN | A$142.27 | USD 99.00 | 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 |
|---|---|---|---|---|
| HQ 7x4x3 | 4 | 2,100 | 5.58 | 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.
measured This propeller size appears in this motor’s own thrust-test table.
| Accessory | Type | From |
|---|---|---|
| Gemfan 7x4 3-blade propeller | propeller | A$1.79 |
| Phaserfpv 7x4 3-blade propeller | propeller | A$4.95 |
| HQProp 7x4 propeller | propeller | A$4.95 |
| DALprop 7x4 2-blade propeller | propeller | A$5.73 |
| APC Propellers 7x4 propeller | propeller | A$5.98 |
| HQProp 7x4 3-blade propeller | propeller | A$6.95 |
| Master Airscrew 7x4 propeller | propeller | A$6.98 |
| Master Airscrew 7x4 3-blade propeller | propeller | A$18.00 |
| Rotorriot 7x4 3-blade propeller | propeller | A$5.73 |
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 7x5 propeller | propeller | A$3.70 |
| APC Propellers 7x5 propeller | propeller | A$4.47 |
| APC Propellers 7x3 propeller | propeller | A$4.98 |
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 →