The UMS 7-Cylinder 360cc Petrol Radial Engine is a high-performance, 4-stroke powerplant designed for serious scale aircraft builders. Delivering breath-taking realism and smooth, powerful performance, this ready-to-run radial engine combines authentic appearance with modern engineering, making it the perfect centrepiece for large-scale RC and replica aircraft projects.

Product Description

The UMS 7-Cylinder 360cc Radial Engine is engineered to provide both true-to-scale visual authenticity and reliable, high-output performance. Its classic 7-cylinder radial configuration closely replicates full-scale aviation engines while delivering smooth, balanced operation across a wide RPM range.

With a substantial 360cc displacement, this engine produces impressive torque and thrust, ideal for large warbirds, scale aerobatic aircraft, and museum-quality replica builds. Supplied ready to run, it includes an exhaust collector ring, electronic ignition, spark plugs, and engine mount, allowing for straightforward installation and setup.

Precision CNC machining from aluminium and bar stock ensures exceptional build quality. Aircraft-grade aluminium alloy cylinder heads and crankcases provide outstanding strength without unnecessary weight. Internally, a double-bearing crankshaft, billet aluminium pistons with hardened steel rings, and hard-chromed cylinder bores ensure long-term durability, smooth running, and excellent compression.

User-friendly throttle and choke bellcranks simplify installation and day-to-day operation, while compatibility with 87–110 octane petrol and a 32:1 fuel mixture makes this engine both practical and versatile.

Designed for builders who demand authentic sound, scale realism, and uncompromising performance, the UMS 7-360cc radial engine is a true statement powerplant.

Key Features

• 7-cylinder 4-stroke radial engine for unmatched scale realism

• 360cc displacement delivering high torque and smooth power

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

• Precision CNC-machined aluminium and bar stock construction

• Aircraft-grade alloy cylinder heads and crankcases

• 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 camshaft for reliable valve timing

• Integrated choke and throttle bellcranks for easy setup

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

Perfect For

• Large-scale RC warbirds and vintage aircraft

• Museum-quality and competition-level scale builds

• Builders seeking authentic radial engine appearance and sound

• High-torque applications requiring smooth, reliable 4-stroke power

• Advanced hobbyists and professional aircraft modellers

Specifications

Engine Type: 4-Stroke
Cylinders: 7 (ABC Type)
Displacement: 360cc
Bore: 40.0mm
Stroke: 42.0mm
Approx. Thrust: 38kgf @ 39×12 prop
RPM Range: 900 – 5,000
Weight (with silencer & ignition): Approx. 9.3kg
Engine Diameter: 340mm
Engine Length: 242mm
Recommended Propeller: 2-Blade 39×12
Muffler Type: Collector Ring
Spark Plug: CM-6 RCExl
Carburettor: Walbro
Fuel Type: Petrol (87–110 octane, 32:1 mix)

Why Buy from Probuild Aircraft

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