The UMS 5-Cylinder 210cc Petrol Radial Engine is a beautifully engineered 4-stroke powerplant designed for scale aircraft builders who demand authentic appearance, smooth operation, and proven reliability. With its classic 5-cylinder radial layout and precision CNC construction, it delivers realistic sound and dependable performance for serious scale and RC aviation projects.

Product Description

The UMS 5-Cylinder 210cc Radial Engine combines traditional radial engine aesthetics with modern manufacturing precision. Its authentic 5-cylinder configuration provides smooth, balanced running while closely replicating the look and sound of full-scale aviation engines.

With a 210cc displacement, this engine is ideally suited to medium and large-scale warbirds, vintage aircraft, and detailed scale builds. Supplied ready to run, it includes an exhaust collector ring, electronic ignition, spark plugs, and a sturdy engine mount—allowing for quick and straightforward installation.

The engine is built using precision CNC-machined aluminium and bar stock, ensuring consistent tolerances and long-term reliability. Aircraft-grade alloy cylinder heads and crankcases provide excellent strength while keeping weight under control. Internally, a heavy-duty double-bearing crankshaft ensures smooth operation and durability even under sustained load.

Billet aluminium pistons fitted with hardened steel rings improve efficiency and compression, while hard-chromed and lapped cylinder bores enhance wear resistance and longevity. Hardened steel camshafts ensure accurate valve timing and dependable long-term performance.

Designed to run on 87–110 octane petrol with a 32:1 fuel-to-oil mixture, the UMS 5-210cc radial engine is practical, versatile, and engineered for real-world flying conditions. It is an excellent choice for builders seeking scale realism, refined engineering, and dependable 4-stroke performance.

Key Features

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

• 210cc 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

• Hardened steel camshafts for precise valve timing

• Integrated choke and throttle bell cranks for easy installation

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

Perfect For

• Scale RC warbirds and vintage aircraft

• Medium to large-scale aircraft projects

• Builders seeking realistic radial sound and appearance

• Smooth, dependable 4-stroke power applications

• Advanced hobbyists and professional aircraft modellers

Specifications

Engine Type: 4-Stroke
Cylinders: 5 (ABC Type)
Displacement: 210cc
Bore: 37mm
Stroke: 39.2mm
Approx. Thrust: 23.5kgf @ 30×12 prop
RPM Range: 1,000 – 5,500
Weight (with silencer & ignition): Approx. 5.8kg
Engine Diameter: 285mm
Engine Length: 205mm
Recommended Propellers:

• 2-Blade 30×10

• 2-Blade 30×12

• 2-Blade 32×10
  

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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