The FlySpark FLS-35CC Gasoline Engine is a lightweight, high-power propulsion unit designed for professional UAVs, fixed-wing aircraft, and hybrid drone systems. Delivering an impressive 3.6 horsepower at 7100 RPM, this engine ensures excellent reliability, power efficiency, and altitude adaptability for demanding flight missions.
Built from precision-engineered materials and optimized for smooth ignition, stable performance, and minimal vibration, the FLS-35CC provides powerful thrust while maintaining fuel efficiency. It is ideal for long-endurance aerial mapping, spraying, and fixed-wing VTOL platforms where consistent output and lightweight design are critical.
The engine supports NGK/EME CM6 spark plugs and operates efficiently across 1550–7500 RPM, with a static pull of up to 9.0 kgf at low altitude. With only 960g total engine weight (plus 45g exhaust), it offers one of the highest power-to-weight ratios in its class.
✅ Key Highlights
High Output Performance: 3.6 HP at 7100 RPM ensures stable thrust for heavy-lift and endurance UAV platforms.
Lightweight Design: Total weight under 1 kg (excluding exhaust) improves overall flight efficiency.
Broad RPM Range: Smooth operation from idle 1550 RPM up to 7500 RPM usable range.
Altitude Adaptability: Maintains 8.1–9.0 kgf static pull across varying altitudes up to 2000m.
Reliable Ignition System: Compatible with EME or NGK CM6 spark plugs for consistent combustion.
Optimal Propeller Compatibility: Supports two-blade propellers from 18×10” to 19×8–10”, delivering excellent balance between thrust and efficiency.
Durable & Versatile: Built for long-duration fixed-wing and UAV operations, with easy maintenance and smooth power delivery.
Technical Specifications
| Item | Specification |
|---|---|
| Displacement | 35 cc |
| Weight | 960 g (engine) + 45 g (exhaust) |
| Compression Ratio | 7.6 : 1 |
| Power Output | 3.6 HP @ 7100 RPM |
| Idle Speed | 1550 RPM |
| Usable Speed Range | 1550–7500 RPM |
| Static Pull (Low Altitude) | 9.0 kgf (50–200m) |
| Static Pull (High Altitude) | 8.1 kgf (1800–2000m) |
| Spark Plug Type | EME / NGK CM6 |
| Recommended Propeller | Two-blade 18×10″ or 19×8–10″ |
| Maximum Propeller Speed | 6500–7300 RPM |
⚙️ Recommended Applications
Fixed-wing UAVs and hybrid VTOL drones
Agricultural spraying systems
Long-endurance mapping aircraft
Industrial inspection UAVs
Custom powertrain drone builds
Propeller Selection:
We recommend using a two-blade propeller with specifications such as 18*10″ or 19*8~10″ (diameter x pitch, in inches), and a maximum speed of approximately 6500-7300 RPM.
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