360KV
6S–8S / 13–15-inch props
Idle current1.2A @ 10V
Resistance53mΩ
Published peak63.5A / 2992W
Bench: 7.962kg at 47.09V, GF1308 three-blade.
Emax USA
EMAX ECOII 4315 Brushless Motor
$38.99 USD
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ECO II SERIES / LARGE MULTIROTOR POWER
Brushless Motor Platform
EMAX ECO II 4315
The EMAX ECO II 4315 is a high-efficiency large brushless outrunner for 13- to 15-inch long-range FPV, heavy-lift multirotors and cinematic aircraft. Four windings—360KV, 380KV, 450KV and 520KV—cover published 6S through 8S applications around a 12N14P architecture, M6 propeller shaft and four-hole 30 × 30mm airframe mount.
Four KV options. One 4315 platform.360KV / 380KV / 450KV: 6S–8S520KV: 6SPublished propeller range: 13–15 inches
Motor weight245gIncluding 400mm leads
Motor sizeØ50.6mm63.7mm overall length
Mount30 × 30mmExactly four M4 holes
Framework12N14PLarge outrunner architecture
Four practical power profiles. Official EMAX bench sheets recorded up to 7.962kg of thrust across 360KV, 380KV, 450KV and 520KV windings.
01 / KV Selection
Match winding, voltage and propeller load.
Published application guidance and maximum-throttle highlights come from the official ECO II 4315 sheets.
380KV
6S–8S / 13–15-inch props
Idle current1.3A @ 10V
Resistance51mΩ
Published peak72.9A / 2352W
Bench: 7.579kg at 32.27V, HQ1507 three-blade.
450KV
6S–8S / 13-inch props
Idle current1.6A @ 10V
Resistance43mΩ
Published peak75.4A / 2428W
Bench: 6.919kg at 32.24V, HQ1308 three-blade.
520KV
6S / 13-inch props
Idle current1.9A @ 10V
Resistance37mΩ
Published peak74.6A / 1792W
Bench: 5.420kg at 24.02V, HQ1310 three-blade.
02 / Performance Envelope
Maximum recorded thrust by winding.
03 / Construction
Large-outrunner hardware with precision support.
01 / SHAFT
Steel M6 Shaft
A CW-threaded M6 propeller interface and 6mm bearing section support the rotating assembly.
02 / ROTOR
Anodized Rotor Bell
The rigid outer bell surrounds a full-height 14-pole permanent-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 / MOUNT
Four-Hole Mount
The 30 × 30mm base has exactly four M4 airframe mounting holes.
06 / LEADS
400mm 16 AWG Leads
Long silicone motor leads provide routing flexibility in large aircraft.
04 / Mechanical Data
4315 geometry and installation details.
| Motor model | EMAX ECO II 4315 |
|---|---|
| Framework | 12N14P |
| Motor diameter | Ø50.6mm |
| Overall length | 63.7mm |
| Weight | 245g with wire |
| Bearing shaft | Ø6mm |
| Propeller shaft | M6 CW thread |
| Mounting pattern | 30 × 30mm, four M4 holes |
| Motor leads | 400mm 16 AWG silicone wire |
| Propeller range | 13–15 inches, KV-dependent |
One platform, four power profiles.
The shared 4315 package lets builders select a winding without changing the four-hole airframe interface.
The official drawing specifies 50.6mm diameter, 63.7mm overall length and a 30 × 30mm four-M4 mounting pattern.
Installation: Confirm frame clearance, screw engagement, propeller retention, ESC headroom and cooling.
05 / Electrical Specifications
KV-specific published limits.
| KV | Cells | Propeller | Idle current | Resistance | Peak current | Max power |
|---|---|---|---|---|---|---|
| 360KV | 6S–8S | 13–15" | 1.2A @ 10V | 53mΩ | 63.5A | 2992W |
| 380KV | 6S–8S | 13–15" | 1.3A @ 10V | 51mΩ | 72.9A | 2352W |
| 450KV | 6S–8S | 13" | 1.6A @ 10V | 43mΩ | 75.4A | 2428W |
| 520KV | 6S | 13" | 1.9A @ 10V | 37mΩ | 74.6A | 1792W |
06 / Bench Data
Maximum-throttle load-test highlights.
360KV test highlightsThree propellers
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 47.09V | GF1308, 3-blade | 63.53A | 7,962g | 2991.63W | 2.66g/W | 13,305 |
| 32.53V | HQ1310, 3-blade | 54.20A | 5,665g | 1763.13W | 3.21g/W | 8,777 |
| 32.41V | HQ1507, 3-blade | 61.20A | 7,032g | 1983.49W | 3.55g/W | 8,537 |
380KV test highlightsThree propellers
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 32.37V | HQ1310, 3-blade | 65.20A | 6,198g | 2110.52W | 2.94g/W | 9,176 |
| 32.46V | GF1309, 3-blade | 58.80A | 6,390g | 1908.65W | 3.35g/W | 9,392 |
| 32.27V | HQ1507, 3-blade | 72.90A | 7,579g | 2352.48W | 3.22g/W | 8,829 |
450KV test highlightsTwo propellers
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 32.24V | HQ1308, 3-blade | 68.80A | 6,919g | 2218.11W | 3.12g/W | 10,598 |
| 32.20V | HQ1309, 3-blade | 75.40A | 6,720g | 2427.88W | 2.77g/W | 10,393 |
520KV test highlightsThree propellers
| Voltage | Propeller | Current | Thrust | Power | Efficiency | RPM |
|---|---|---|---|---|---|---|
| 24.31V | HQ1308, 3-blade | 58.94A | 5,268g | 1432.83W | 3.68g/W | 9,371 |
| 24.19V | HQ1309, 3-blade | 62.70A | 5,079g | 1516.71W | 3.35g/W | 9,151 |
| 24.02V | HQ1310, 3-blade | 74.61A | 5,420g | 1792.13W | 3.02g/W | 8,629 |
07 / In The Box
Motor and mounting hardware included.
1×EMAX ECO II 4315 brushless motor
4×M4 × 12mm mounting screws
1×Steel M6 nylock nut
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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