There are engine assemblers, and then there are engine builders. It's one thing to merely bolt a bunch of parts together. It’s quite another thing to carefully assemble machined components to precise ...

Powered by conventional piston engines, helicopters like the Bell H-13 Sioux pulled wounded off the battlefield faster than ever. Later, the helicopter would receive a significant upgrade in the ...

This design was originally patented in 1932 by Swiss engineer Arnold Zoller for use in opposed-piston engines and is commonly used in radial engines. Potential Applications: Mid-Engine & Hybrid ...