GF38 37.97cc 4‑Stroke Gasoline UAV Engine

Core Product Advantages

The GF38 is a compact four‑stroke gasoline power‑unit, low‑vibration fixed‑wing RC airplane motor and reliable civilian‑grade UAV engine, designed for medium‑size hobby aircraft, aerial‑photography unmanned planes and lightweight inspection‑drones. Its key advantages are listed below:

Optimized Four‑Stroke Structure
Four‑stroke piston‑type construction brings smoother running, less vibration and quieter operation compared to 2‑stroke motors, which is perfect for aerial shooting missions that demand stable platform performance.
Stable and Powerful Thrust Performance
With 37.97‑cc displacement, this gasoline engine delivers peak power of 3.58 HP at 8300 rpm, providing sufficient thrust for take‑off, climb‑out and high‑speed cruise of medium‑sized fixed‑wing aircraft.
Wide Usable Speed Range
Its stable working RPM covers 1600‑8000 rpm. The broad rotational‑speed bandwidth adapts to low‑speed cruising patrol, medium‑speed hovering and high‑speed flight under multiple aerial‑operation scenarios.
Compact‑Size Light‑Weight Design
The main engine body weighs only 1310g and the separate ignition module weighs 100g. The moderate‑weight structure leaves extra payload capacity for airborne cameras and sensing devices.
Multiple Two‑Blade Propeller Compatibility
Three common propeller sizes are supported:18×8‑10, 19×8‑10 and 20×8. Users are able to swap propellers to adjust thrust, flight speed and flight endurance for different tasks.
Mature Ignition System and Standard Fuel‑Oil Matching
The independent ignition module accepts wide‑voltage DC 6V‑14.4V 1000mAh power supply for dependable spark ignition in complicated outdoor environments. It uses a 35:1 mixing‑ratio of 92‑octane gasoline and full‑synthetic two‑stroke lubricant for convenient routine maintenance.

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Product Overview

1. Product Positioning for Light‑to‑Medium‑Sized Civil Fixed‑Wing Unmanned Aircraft

GF38 is an air‑cooled four‑stroke piston‑style gasoline engine for UAV. Distinct from our two‑stroke GT‑series power plants, this four‑stroke engine prioritizes low‑vibration, low‑noise and steady running performance. It is well‑suited for RC hobby aircraft, aerial‑photography drones and lightweight short‑range inspection unmanned aerial vehicles.

The reduced‑vibration running condition effectively cuts motion blur and helps airborne camera equipment capture crisp photographs.

2. Rotational‑Speed Characteristic and Thrust Adjustment

The practical working‑speed range runs 1600 rpm‑8000 rpm. When the motor reaches 8300 rpm, it outputs the maximum 3.58‑horsepower power.

Three kinds of two‑blade propellers are optional. Pilots are allowed to match different propeller specifications to realize low‑speed long‑time patrol or fast‑speed cruise flight.

3. Ignition Configuration and Fuel‑Mix Specification

The detachable ignition component weighs 100g and supports DC 6V‑14.4V wide‑range power supply. Its 1000‑mAh power source maintains stable spark output through the whole flight.

Ordinary 92# unleaded gasoline must be blended with full‑synthetic two‑stroke dedicated lubricating oil under the mixing‑proportion 35:1. Mixed fuel reduces wear on internal moving components and prolongs engine service life for long‑hour continuous‑running task 发动机 (12).webp s.

Technical Parameter Item	Verified Standard Parameter Value
Product Model	GF38
Total Displacement	37.97 cc
Usable RPM Operating Range	1600‑8000 rpm
Maximum Output Power	3.58 HP @8300 rpm
Main Engine Net Weight	1310 g
Ignition Module Weight	100 g
Ignition Working Power Supply	DC 6V‑14.4V, 1000mAh power source
Suitable Propeller Spec (Two‑Blade)	18×8‑10, 19×8‑10, 20×8
Required Fuel Type	92# unleaded gasoline + full‑synthetic 2‑stroke lubricant
Gasoline‑to‑Lubricant Mix Ratio	35:1
Engine Type	Air‑Cooled 4‑Stroke Piston UAV Gasoline Engine
Suitable Civil‑Use Scenarios	Medium‑size fixed‑wing RC airplane, hobby‑grade drone, aerial‑photography unmanned aircraft, lightweight short‑range inspection UAV

Packing & Shipping

Shock‑Resistant Foam and Reinforced Hard‑Case Packaging
Each GF38 drone engine is wrapped by thick shock‑absorbing foam around cylinder head, carburetor and ignition assemblies. The engine is secured inside a heavy‑duty hard storage case, shielding precision spare‑parts from collision, moisture and dust in long‑distance international transportation. Exposed metal fittings are covered by transparent protective film.
Full‑Set Standard‑Configured Accessories
Standard delivery includes propeller fasteners, mounting gaskets, fuel‑mix measuring cup, routine‑maintenance toolkit and detailed English‑language operation manual. Custom mufflers and spare ignition parts are available upon request.
Global Multimodal Logistics and Customs‑Clearance‑Ready Documents
We cooperate with international freight providers to provide sea‑shipping, air‑express and door‑to‑door land‑based delivery for overseas RC‑aircraft enthusiasts, small‑drone manufacturers and civilian aerial‑survey operators. Every shipment is equipped with commercial invoice, packing checklist and factory performance test certificate to accelerate overseas customs declaration.

Frequently Asked Questions (FAQ)

Q1: What types of unmanned aircraft is the GF38 four‑stroke gasoline engine suitable for?

A1: This low‑vibration four‑stroke powerplant fits medium‑sized fixed‑wing RC aircraft, hobby‑grade drones and lightweight aerial‑photography UAVs. Its smooth‑running property is very suitable for airborne camera shooting work.

Q2: What fuel‑oil mixing‑ratio should I adopt and how do I select the proper propeller?

A2: You must mix 92‑octane unleaded gasoline and full‑synthetic two‑stroke lubricating oil strictly at 35:1. Three sizes of two‑blade propellers are optional to adjust flight thrust and speed. You can check the official operation manual for fuel‑blending guidance and propeller‑matching suggestions.