3W-112i B4 Four-Cylinder Gasoline Engine

A: The 3W-112i B4 is a 114cc four-cylinder gasoline RC aircraft engine designed for large-scale model aircraft, scale aircraft, sport aircraft, aerobatic aircraft and professional aeromodelling applications.

A: The listed import price is US$7,055 for the 3W-112i B4 Standard Tractor Package. Final pricing may vary if pusher configuration, installation support, propeller matching, workshop support or UAV prototype integration assistance is added.

A: The official displacement is 114.0cc.

A: The engine is officially listed with 12.2HP / 8.97kW output.

A: The official RPM range is 1,000–7,000 RPM.

A: The listed bore diameter is 36.00mm and the listed stroke is 28.00mm.

A: The official weight including ignition is 3.870kg.

A: The official oil/gasoline ratio is 1:50–1:80 with minimum 92-octane fuel reference.

A: The official ignition voltage range is 6.0–8.4V DC.

A: The 3W-112i B4 uses microprocessor-controlled ignition with a programmed ignition curve matched to the engine for good running behavior across the RPM range.

A: Yes, official references list tractor and pusher SKU options. The required configuration should be confirmed before ordering.

A: The four-cylinder layout and smooth-running crankshaft architecture help reduce vibration, protect the model and electronics, and reduce harsh operating noise.

A: It is suitable for large-scale RC aircraft, scale models, sport aircraft and aerobatic aircraft that are designed for a 114cc-class four-cylinder gasoline engine.

A: It is best suited for experienced RC pilots or beginners working under expert supervision. Four-cylinder gasoline engines require careful installation, fuel handling, ignition setup, tuning and propeller safety.

A: Yes, it may be used in petrol-powered fixed-wing UAV prototype projects if the airframe, vibration isolation, fuel system, cooling, propeller, ignition and safety procedures are professionally engineered.

A: Propeller selection should be matched to the airframe, engine version, RPM target, altitude and flight style. Use manufacturer guidance or professional propeller matching support before operation.

A: A propeller should be treated as required separately unless specifically included in the final quotation. Confirm final package contents before order.

A: Typical required items include suitable propeller, fuel tank, fuel tubing, fuel filter, ignition battery, switch harness, throttle linkage, engine mount, cooling layout, starter equipment, field tools and correct gasoline/oil mix.

A: Maintenance should include checking propeller bolts, engine mounting bolts, exhaust hardware, spark plugs, ignition wiring, fuel lines, fuel filter, throttle linkage, carburetor tuning and general engine cleanliness.

A: Operators should follow propeller safety, fuel safety, fire safety, controlled starting procedure, secure mounting, safe tuning practice and field operation rules. Never stand in front of or in line with the propeller while the engine is running.

A: A four-cylinder RC gasoline engine can offer smoother operation, reduced vibration, improved running refinement and better protection for sensitive electronics in demanding large aircraft builds.

A: Warranty support generally covers manufacturing defects under approved use and normal operating conditions. Damage from incorrect fuel mix, poor tuning, overheating, propeller strike, crash impact, vibration damage, dirt ingestion, water exposure or unauthorized modification may not be covered.