The UMS 5-Cylinder 180cc Petrol Radial Engine is a compact yet powerful 4-stroke radial engine designed for scale aircraft builders who want authentic appearance, smooth performance, and long-term reliability. Precision CNC-machined and supplied ready to run, this engine delivers classic radial sound and dependable power for serious scale and RC aircraft projects.

Product Description

The UMS 5-Cylinder 180cc Radial Engine offers an ideal balance of realistic scale appearance and modern engineering performance. Its classic 5-cylinder radial configuration provides smooth, well-balanced operation while accurately replicating the look and sound of full-scale aircraft engines.

With a 180cc displacement, this engine is perfectly suited for medium-scale warbirds, vintage aircraft, and detailed scale models. Supplied ready to run, it includes an exhaust collector ring, electronic ignition system, spark plugs, and a robust engine mount, allowing for straightforward installation and quick setup.

Built using precision CNC-machined aluminium and bar stock, the engine maintains tight manufacturing tolerances for consistent performance. Aircraft-grade aluminium alloy cylinder heads and crankcases ensure strength and durability while keeping weight to a minimum. A heavy-duty double-bearing crankshaft provides smooth operation and enhances longevity under sustained loads.

Internally, billet aluminium pistons with hardened steel rings reduce friction and improve combustion efficiency, while hard-chromed and lapped cylinder bores deliver excellent wear resistance. Hardened steel camshafts ensure accurate valve timing and reliable long-term performance.

Designed to operate on 87–110 octane petrol with a 32:1 fuel-to-oil mixture, the UMS 5-180cc radial engine is versatile, practical, and engineered for real-world flying conditions. It is an excellent choice for builders seeking authentic radial sound, refined construction, and dependable 4-stroke power.

Key Features

• 5-cylinder 4-stroke radial engine with authentic scale appearance

• 180cc displacement delivering smooth, reliable power

• Ready-to-run package including ignition, plugs, exhaust collector ring & engine mount

• Precision CNC-machined aluminium and bar stock construction

• Aircraft-grade alloy cylinder heads and crankcases

• Heavy-duty double-bearing crankshaft for smooth, stable operation

• Billet aluminium pistons with hardened steel piston rings

• Hard-chromed and lapped cylinder bores for durability and longevity

• Hardened steel camshafts for precise valve timing

• Integrated choke and throttle bellcranks for easy installation

• Compatible with 87–110 octane petrol (32:1 fuel mix)

Perfect For

• Scale RC warbirds and vintage aircraft

• Medium-scale aircraft projects

• Builders seeking realistic radial sound and appearance

• Smooth, dependable 4-stroke petrol power

• Advanced hobbyists and professional aircraft modellers

Specifications

Engine Type: 4-Stroke
Cylinders: 5 (ABC Type)
Displacement: 180cc
Bore: 35.7mm
Stroke: 37mm
Approx. Thrust: 21kgf @ 30×10 prop
RPM Range: 1,000 – 5,500
Weight (with silencer & ignition): Approx. 5.5kg
Engine Diameter: 277mm
Engine Length: 198mm
Recommended Propellers:

• 2-Blade 28×10

• 2-Blade 28×12

• 2-Blade 30×10
  

Muffler Type: Collector Ring
Spark Plug: CM6
Carburettor: Walbro
Fuel Type: Petrol (87–110 octane, 32:1 mix)

Why Buy from Probuild Aircraft

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