Overview
The VCI SPARK 4218 is a brushless outrunner motor for RC propulsion systems. It is available in two KV options (350KV or 540KV) to match different voltage and propeller setups.
Key Features
- Selectable KV options: 350KV or 540KV
- 4218 stator format with arc magnets
- 4x M4 mounting hole pattern
- 14AWG motor leads
Specifications
| Series / Model | SPARK 4218 |
| KV options | 350KV; 540KV |
| KV (detailed specs below) | 350KV |
| Rated voltage | 12S (48V) |
| Rated configuration | 12S14P |
| Phase resistance | 40 mΊ |
| No-load current (10V) | 1.1 A |
| Magnets | N52SH arc |
| Stator size | Ã42 x 18 mm |
| Motor body size | Ã54.4 x L50.3 mm |
| Overall length | 68.9 mm |
| Outer diameter | Ã54.4 mm |
| Shaft | Ã4 / M6 |
| Shaft length | 6.5 / 20 mm |
| Mounting holes | 4x M4 |
| Mounting pattern | Ã30 mm |
| Motor leads | 14AWG, 750 mm |
| Weight (with wires) | 270.8 g |
Load Test Data (4218-350KV)
Test voltage: 48 V.
| Prop | Throttle | Current (A) | Thrust (g) | Efficiency (g/W) | Power (W) | Speed (RPM) | Temp (°C) |
|---|---|---|---|---|---|---|---|
| GF 1308-3 | 100% | 57.33 | 7943 | 2.89 | 2751.84 | 12913 | 76 |
| GF 1310-3 | 100% | 73.54 | 8297 | 2.35 | 3529.92 | 12066 | 127 |
| JXF 15*5.5-2 | 100% | 64.59 | 9798 | 3.16 | 3100.32 | 12289 | 93 |
Applications
- Multirotor drone propulsion
- Custom UAV/robotics thrust systems using an outrunner motor format
For selection help between 350KV and 540KV or build compatibility questions, contact [email protected] or visit https://rcdrone.top/.
Details


48 V load-test results for the 4218-350KV option, including thrust, current draw, efficiency, RPM, and temperature across prop setups.
