R-5 Aircraft Engine

The UGEARS R-5 Aircraft Engine is a working model of the Kinner five-cylinder radial engine, certified in 1935 and used in trainer aircraft through the 1930s and World War II. Plug in a USB-C cable, flip the switch, and the pistons, valves and propeller run in sequence, so you can see exactly how a radial engine works. The kit combines wood, metal and electronic components in one build.

Key features

• Five pistons moving in the correct 1-3-5-2-4 firing order
• Synchronized valvetrain with metal pushrods and compression springs
• Gear-driven valve timing and a visible crankshaft
• Milled propeller with a safety release that disengages if it meets resistance
• On/off switch in the base and control board built into the stand

Specifications

• Power: electric motor via USB-C
• Materials: wood, metal and electronic components
• Assembly: no glue or special tools needed
• Instructions: step by step, in 11 languages

More engines and machines are in our build kits for adults.