Product Overview
WGT550EFI is a 550cc four‑cylinder 2‑stroke water‑cooled drone gasoline engine, purpose‑built for medium‑to‑large civil UAV with heavy‑payload and long‑duration flight demands. It comes from factory with electronic fuel injection (EFI) for precise fuel metering and reliable performance across different altitudes and temperatures. Users may choose to convert it to carburetor configuration as an alternative. The Ni‑SiC coated cylinder ensures durability under frequent high‑power cycles. High horsepower and strong torque make it suitable for large‑scale mapping, inspection and civil cargo‑carrying drone projects. Custom‑tailored development is available to match customer‑specific mechanical and system requirements.
Main Technical Specifications
| Item | Specifications | ||
|---|---|---|---|
| Displacement | 550cc (137.5cc*4) | ||
| RPM Operating Range | 800‑7000 rpm | ||
| Stroke | 52 mm | Bore | 58 mm |
| Max Output | 50HP (37kW) @7500rpm | ||
| Max Torque | 46 N·M @5700rpm | ||
| Fuel Consumption | 480g/kW·h | ||
| Cylinder Block | Aluminum alloy casting, inner wall electroplated Ni‑SiC | ||
| Engine Weight | 19 kg | ||
| Required Fuel | 95# Gas + Fully synthetic 2T lubricating oil | ||
| Fuel‑Oil Mix Ratio | Gasoline : Lubricating oil = 35 : 1 |
Performance Characteristic
This four‑cylinder water‑cooled drone gasoline engine achieves peak torque at 5700 rpm, providing robust thrust for heavy‑payload UAV take‑off and climbing. Water‑cooled thermal management stabilizes cylinder temperature during extended high‑power running and avoids overheating‑caused power drop. The standard EFI version delivers good high‑altitude adaptability; the optional carburetor modification fits cost‑sensitive application cases. Wear‑resistant cylinder hardware maintains consistent power output over numerous flight cycles for commercial UAV operations.
Application Scenarios
This high‑power water‑cooled 2‑stroke gasoline engine suits multiple large‑scale civil‑oriented UAV projects:
Medium‑large heavy‑payload commercial UAV platforms
Large‑area aerial mapping, long‑distance inspection and monitoring drones
Civil light cargo‑carrying UAV power systems
Large‑size civil drone system integration
Custom light aviation power projects
Customized development service is available. We can adjust parameters, mounting interfaces and auxiliary structures according to customer‑specific integration requirements.
FAQ
What are the main differences between EFI standard version and modified carburetor version of WGT550EFI?
A: The stock EFI version features precise fuel injection, better high‑altitude performance and more stable cold start. The modified carburetor version has simpler structure and lower maintenance cost, yet its adaptability to variable altitude and temperature is relatively weaker.
What supporting components are necessary for normal operation of this water‑cooled four‑cylinder UAV engine?
A: It requires a complete water‑cooling kit including radiator, water pump, connecting pipelines and temperature monitoring parts. Proper thermal‑system matching must be completed in the UAV design phase to guarantee reliable long‑time operation.
