7-inch FPV long-range motor
EMAX E3 2808
A 7-inch motor for long range and cinematic rigs: 2808 stator, single-strand windings, 53.6 g without leads, and up to 2,640 g of pull per motor on EMAX’s 6S bench (1500KV).
- 7-inch long range and cinematic
- 6S
- 6 to 7-inch props
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2808 motor drawn from EMAX’s published sizes, not its exact design. No-load speed is KV × 22.2 V, a nominal pack for this version. EMAX’s bench tables for it step by thrust rather than throttle, so they are in the bench data below, not on this readout.
- Max thrust
- 2,340 g
- EMAX Avia 7035 prop, 25.2 V
- Weight
- 53.6 g
- without leads; 1500KV 53.8 g
- Peak current
- 33.8 A
- full throttle
- Max power
- 852 W
- full throttle
from $23.99a motor at EMAX USA
A set of four: $95.96
Price seen Oct 19, 2026. Plain links: we earn nothing from them.
What you get for $23.99
2.6 kg of pull on 6S
On EMAX’s 25.2 V bench the 1500KV pulled 2,640 g at full throttle on an EMAX Avia 7040, drawing 52.3 A.
5.51 g/W at 300 g
Making 300 g of thrust on 6S, the 1300KV ran at 5.51 g/W on an EMAX Avia 7035.
Single-strand windings
EMAX winds the E3 series with single strands, which it says lowers electrical resistance and helps the motor shed heat.
Source: EMAX USA product page
For larger rigs
EMAX pitches the E3 2807 and 2808 at larger rigs, high-load cinematic flying and Pro Spec racing; the 2808 has a 5 mm shaft through its bearings and 7075 aluminium construction.
Source: EMAX USA product page, EMAX spec sheet and thrust tables
What to pair it with
Our reading of EMAX’s numbers, so your build matches what the motor was tested with.
- ESC
- EMAX rates the peak current at 56 A (1300KV) and 65 A (1500KV) on 6S. On its bench the 1500KV drew 52.3 A at full throttle on an Avia 7040. A 60 A ESC covers the 1300KV; for the 1500KV, choose one rated for at least 65 A. (EMAX spec sheet and thrust tables)
- Props
- EMAX lists 6 to 7-inch props and tested its own three-blade Avias on 6S: 2,340 g at full throttle for the 1300KV on a 7035 and 2,640 g for the 1500KV on a 7040. (EMAX spec sheet and thrust tables)
- Battery
- 6S: EMAX rates both KVs for 3S–6S and tested them at 25.2 V. (EMAX spec sheet and thrust tables)
- Frame
- Four M3 holes on a 19 mm circle (19 × 19 mm). (EMAX spec sheet and thrust tables)
Where to buy
- EMAX USAthe maker’s US store; same price for both KVs$23.99seen Oct 19, 2026Visit
- EMAXthe maker’s global store, as the ECOIII 2808$36.94seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 1,300 rpm/V (also 1500KV) | EMAX USA product page, EMAX product page |
| Stator | 28 × 8 mm (2808) | EMAX USA product page, EMAX spec sheet and thrust tables |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | EMAX spec sheet and thrust tables |
| Battery | 3S–6S LiPo | EMAX spec sheet and thrust tables |
| Weight | 53.6 g (without leads; 1500KV 53.8 g) | EMAX spec sheet and thrust tables |
| Dimensions | φ34.8 × 37 mm (with shaft); 30.4 mm from the bottom of the bell to the shaft tip | EMAX spec sheet and thrust tables |
| Shaft | Hardened steel, M5 thread, protrudes 15 mm; 5 mm through the bearings | EMAX spec sheet and thrust tables, EMAX USA product page |
| Mounting | 4 × M3 holes on a 19 mm circle (19 × 19 mm) | EMAX spec sheet and thrust tables |
| Bell | 7075 aluminium | EMAX USA product page |
| Magnets | N52SH arc magnets | EMAX USA product page |
| Bearings | G1 bearings (EMAX’s E3 infographic; it gives no size) | EMAX USA product page |
| Winding | Single-strand | EMAX USA product page |
| Internal resistance | 56 mΩ (1500KV 47 mΩ) | EMAX spec sheet and thrust tables |
| Idle current | 1.5 A (at 10 V; 1500KV 1.8 A) | EMAX spec sheet and thrust tables |
| Peak current | 56 A (on 6S; 1500KV 65 A) | EMAX spec sheet and thrust tables |
| Max power | 1,410 W (on 6S; 1500KV 1640 W) | EMAX spec sheet and thrust tables |
| Leads | 18 AWG, 250 mm | EMAX spec sheet and thrust tables |
Bench data
Redrawn from EMAX’s test reports. Thrust is static pull on a bench, more than you get in flight. Power is volts × amps; efficiency is thrust divided by power.
1300KV on 6S, 25.2 V1 prop
| Prop | Step | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| EMAX Avia 7035 (3-blade) | 2.16 | 300 | 54.43 | 5.51 | |
| 4.13 | 515 | 104.08 | 4.95 | ||
| 6.74 | 740 | 169.85 | 4.36 | ||
| 10.2 | 1,030 | 257.04 | 4.01 | ||
| 14.8 | 1,350 | 372.96 | 3.62 | ||
| 19.9 | 1,670 | 501.48 | 3.33 | ||
| 26.3 | 2,010 | 662.76 | 3.03 | ||
| Max | 33.8 | 2,340 | 851.76 | 2.75 |
1500KV on 6S, 25.2 V1 prop
| Prop | Step | Current (A) | Thrust (g) | Power (W) | Efficiency (g/W) |
|---|---|---|---|---|---|
| EMAX Avia 7040 (3-blade) | 2.7 | 330 | 68.04 | 4.85 | |
| 5.63 | 580 | 141.88 | 4.09 | ||
| 8.9 | 860 | 224.28 | 3.83 | ||
| 14.1 | 1,220 | 355.32 | 3.43 | ||
| 20.7 | 1,610 | 521.64 | 3.09 | ||
| 29.3 | 2,020 | 738.36 | 2.74 | ||
| 39.8 | 2,330 | 1002.96 | 2.32 | ||
| Max | 52.3 | 2,640 | 1317.96 | 2 |
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Shaft. Hardened steel, M5 thread, protrudes 15 mm; 5 mm through the bearings. (EMAX spec sheet and thrust tables, EMAX USA product page)
- Bell. 7075 aluminium. (EMAX USA product page)
- Magnets. N52SH arc magnets. (EMAX USA product page)
- Stator. The coils are wound on a stack of thin steel laminations: 28 × 8 mm (2808). (EMAX USA product page, EMAX spec sheet and thrust tables)
- Winding. Single-strand. (EMAX USA product page)
- Bearings. G1 bearings (EMAX’s E3 infographic; it gives no size). (EMAX USA product page)
- Base. 4 × M3 holes on a 19 mm circle (19 × 19 mm). (EMAX spec sheet and thrust tables)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1300KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.
| Battery | Volts | No-load rpm (KV × V) | Electrical frequency | ESC steps per second |
|---|---|---|---|---|
| 4S nominal | 14.8 | 19,240 | 2,245 Hz | 13,468 |
| 4S full | 16.8 | 21,840 | 2,548 Hz | 15,288 |
| 6S nominal | 22.2 | 28,860 | 3,367 Hz | 20,202 |
| 6S full | 25.2 | 32,760 | 3,822 Hz | 22,932 |
A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.
About the 3D model
A generic outrunner drawn from EMAX’s published sizes: the 28 × 8 mm stator, 34.8 mm bell, 22 mm height, 5 mm shaft, 19 mm mounting circle and 12 teeth and 14 magnets. Anything EMAX doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.
Sources
- EMAX USA: E3 Series 2808 Brushless Motor (product page, with its spec table and EMAX’s E3 infographics). Retrieved Oct 19, 2026.
- EMAX: ECOIII series 2808 1300KV 1500KV (product page on EMAX’s global store). Retrieved Oct 19, 2026.
- EMAX: ECOIII-2808 spec sheet and thrust tables (dimension drawing, spec table for each KV, and bench tables at 25.2 V on EMAX’s Avia 7035 and 7040 three-blades; one image on EMAX’s product page). The bench tables step by thrust, then “Max” at full throttle; EMAX’s rpm column is left out because it has no figure at full throttle.. Retrieved Oct 19, 2026.
