280KV
12S / 15-inch props
Idle current0.8A @ 10V
Resistance68mΩ
Published peak56.7A / 2677.4W
Bench: 7.115kg at 47.22V, 15×10 two-blade.
Emax USA
EMAX ECOII 3530 Brushless Motor
$48.99 USD
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ECO II SERIES / FIXED-WING POWER
Brushless Motor Platform
EMAX ECO II 3530
The EMAX ECO II 3530 is a tall, high-torque brushless outrunner for fixed-wing aircraft using 12- to 15-inch propellers. Four windings—280KV, 445KV, 520KV and 650KV—span 5S through 12S systems around a 12N14P architecture, M6 propeller shaft, 25 × 25mm four-M3 motor mount and supplied X-shaped firewall mount.
Four KV options. One 3530 platform.280KV: 12S / 15-inch prop445KV: 6S / 14–15-inch props520KV: 6S / 13–14-inch props650KV: 5S–6S / 12–14-inch props
Motor weight300gIncluding 95mm leads
Motor sizeØ42.5mm82mm overall length
Motor mount25 × 25mmExactly four M3 holes
Framework12N14PFixed-wing outrunner
Four fixed-wing power profiles. Official EMAX bench sheets recorded up to 7.115kg of thrust, with windings covering 5S through 12S systems.
01 / KV Selection
Match winding, voltage and propeller load.
Published electrical guidance and maximum-throttle highlights come from the official ECO II 3530 sheets.
445KV
6S / 14–15-inch props
Idle current1.3A @ 10V
Resistance32mΩ
Published peak57.2A / 1403.7W
Bench: 5.300kg at 24.54V, HQ15×10 two-blade.
520KV
6S / 13–14-inch props
Idle current1.5A @ 10V
Resistance22mΩ
Published peak56.8A / 1394W
Bench: 5.510kg at 24.53V, GF14×7 two-blade.
650KV
5S–6S / 12–14-inch props
Idle current2.1A @ 10V
Resistance16mΩ
Published peak82.5A / 2004.7W
Bench: 6.250kg at 24.29V, HQ13×6.5 two-blade.
02 / Performance Envelope
Maximum recorded thrust by winding.
03 / Construction
Tall outrunner architecture for sustained propeller load.
01 / SHAFT
Steel M6 Shaft
An 18mm-long CW-threaded M6 propeller interface uses a 6mm bearing shaft.
02 / ROTOR
Anodized Rotor Bell
The tall rigid outer bell surrounds a full-height 14-pole magnet ring.
03 / STATOR
12-Slot Wound Stator
Dense multi-strand copper windings form the fixed 12-slot stator.
04 / BEARING
Precision Bearing
Concentric bearing support promotes smooth rotation under sustained load.
05 / MOTOR MOUNT
Four-Hole Rear Base
The motor base uses exactly four M3 threaded holes on a 25 × 25mm pattern.
06 / CONNECTIONS
4mm Banana Plugs
Three 95mm enamelled leads terminate in male 4.0mm banana connectors.
04 / Mechanical Data
3530 geometry and installation details.
| Motor model | EMAX ECO II 3530 |
|---|---|
| Framework | 12N14P |
| Motor diameter | Ø42.5mm |
| Overall length | 82mm |
| Body length | 55mm |
| Weight | 300g with wire |
| Bearing shaft | Ø6mm |
| Propeller shaft | M6 CW thread, 18mm threaded length |
| Motor mounting | 25 × 25mm, four M3 holes |
| Supplied X mount | 50/60mm mounting circles, four Ø4.1mm holes |
| Motor leads | 95mm enamelled wire with 4.0mm male plugs |
Fixed-wing installation, complete hardware kit.
The compact four-M3 rear base attaches to the included X-shaped firewall mount.
The separate mount provides four outer airframe holes while the motor retains its precise 25 × 25mm interface.
Installation: Confirm firewall strength, propeller clearance, fastener engagement, ESC headroom and cooling.
05 / Electrical Specifications
KV-specific published limits.
| KV | Cells | Propeller | Idle current | Resistance | Peak current | Max power |
|---|---|---|---|---|---|---|
| 280KV | 12S | 15" | 0.8A @ 10V | 68mΩ | 56.7A | 2677.4W |
| 445KV | 6S | 14–15" | 1.3A @ 10V | 32mΩ | 57.2A | 1403.7W |
| 520KV | 6S | 13–14" | 1.5A @ 10V | 22mΩ | 56.8A | 1394W |
| 650KV | 5S–6S | 12–14" | 2.1A @ 10V | 16mΩ | 82.5A | 2004.7W |
06 / Bench Data
Maximum-throttle load-test highlights.
280KV test highlight12S / 15×10 two-blade
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 47.22V | 15×10, 2-blade | 56.70A | 7,115g | 2677.4W | 2.70g/W | 9,690 |
445KV test highlightsThree propellers
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 24.71V | GF14×7, 2-blade | 37.40A | 4,330g | 925.3W | 4.68g/W | 9,025 |
| 24.68V | HQ15×7, 2-blade | 41.70A | 4,850g | 1029.7W | 4.71g/W | 8,866 |
| 24.54V | HQ15×10, 2-blade | 57.20A | 5,300g | 1403.7W | 3.78g/W | 8,289 |
520KV test highlightsTwo propellers
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 24.59V | GF13×6.5, 2-blade | 49.20A | 4,830g | 1208.9W | 4.00g/W | 10,376 |
| 24.53V | GF14×7, 2-blade | 56.80A | 5,510g | 1394.0W | 3.95g/W | 10,112 |
650KV test highlightsThree propellers
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 20.47V | GF14×7, 2-blade | 70.70A | 5,550g | 1447.6W | 3.83g/W | 10,099 |
| 24.46V | HQ12×6, 2-blade | 62.10A | 5,060g | 1519.9W | 3.33g/W | 12,701 |
| 24.29V | HQ13×6.5, 2-blade | 82.50A | 6,250g | 2004.7W | 3.12g/W | 11,910 |
07 / In The Box
Motor, firewall mount and connection hardware.
1×EMAX ECO II 3530 motor
1×X-shaped motor mount
5×M3 × 6mm screws
1×Steel M6 nylock nut
1×Serrated propeller washer
3×4.0mm female connectors
Product information
All parts are shipped fast from SYRACUSE, NEW YORK & some DROP SHIP ORDERS from San Diego, California. If there's an issue with something, please let us know and we will do our best make it right! SaltCtyRacingFPV, LLC dba "weBLEEDfpv.com" offers a (30) day return policy on all new unopened equipment, starting from the date the product(s) was delivered to the customer. Anything beyond (30) days of delivery will not be eligible for return. If the product(s) received have been opened, used or damaged, no return options will be offered. If the item is in brand new condition but requires to be repackaged, a (15%) restocking fee will be applied. The shipping cost for any unwanted product will not be refunded by SaltCtyRacingFPV "weBLEEDfpv.com" (It is recommended to choose a return shipping method with tracking).
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Please email at SaltCtyRacingFPV@gmail.com to contact us and initiate a return. Please contact us first before sending anything back.
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Flight Controller / VTX Warranty Policy
At weBLEEDfpv, we are committed to providing high-quality products. However, due to the technical nature of flight controllers and VTX's the precision required for installation, our warranty policy for flight controllers is as follows:
1. No Warranty Post-Soldering:
Once any soldering has been performed on the flight controller / VTX's, we are no longer responsible for replacements, repairs, or refunds. The process of soldering can introduce various factors that may lead to damage, and we are unable to control or verify the conditions in which the soldering was conducted.
2. Pre-Soldering Inspection:
Before you begin soldering, we recommend carefully inspecting the flight controller / VTX's for any potential issues. If any defects or issues are found prior to soldering, please contact us immediately for a replacement.
3. User Responsibility:
Soldering requires skill and experience, and improper techniques may result in damage to the flight controller, including but not limited to overheating or lifting solder pads. Please ensure you are confident in your soldering abilities before proceeding, as we cannot be held liable for any damages caused during installation.
4. Final Sale:
All flight controller sales are final once the product has been modified or soldered. We are unable to offer returns or exchanges on used or modified products.
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⚠️ FPV DIGITAL SYSTEM NOTICE
HDZero, Walksnail, VTX systems, and ultra-micro FPV electronics generate heat quickly while powered and require proper handling during setup and troubleshooting.
Bench setup without airflow/cooling can result in excessive heat buildup.
Once powered, configured, firmware updated, soldered, flown, or modified, products are considered used.
Manufacturer warranty may apply for BNF drones and electronic systems.
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Lithium Ion Battery No Acceptance Policy
For our lithium ion battery products, all sales are final. This means:
- No Returns or Exchanges: Once your purchase is completed, we do not accept returns, exchanges, or cancellations.
- Customer Responsibility: Please review all product specifications and details carefully before making your purchase.
- Safety and Compliance: Due to safety standards and regulatory guidelines, we cannot process any post-sale modifications.
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Thank you for your understanding.
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