R-5 Aircraft Engine 470Pcs - Mechanical 3D Wooden Puzzle

R-5 Aircraft Engine - USB-C Powered Radial Aviation Model

Feel the heartbeat of early flight with the Ugears R-5 Aircraft Engine. Inspired by 1930s five-cylinder Kinner radial aircraft engines, this 470-piece advanced wooden puzzle demonstrates internal combustion mechanics. Powered via USB-C, the model animates five synchronized pistons, realistic valvetrains, and a spinning propeller on an elegant exhibition stand.

Authentic Mechanical Synchronization

• True Firing Sequence: Operates in the exact radial engine firing order: 1-3-5-2-4.
• Pushrods & Springs: Features functional metal pushrods, compression springs, and cam-driven valve timing.
• Safety Propeller: Milled propeller includes a built-in slip clutch that disengages upon contact.