Viega North America has announced its new globe, wafer check and butterfly valves for its MegaPress and ProPress systems.

This means it is a reciprocating rotary engine. Yeah, weird stuff. The camshaft is also centrally located in the crankcase and still runs at 50-percent crankshaft speed but only actuates one valve ...

Many of you have seen the process of making this rotary valve engine with different intake and exhaust system and how I tried to start it. After so many attempts to start this engine, I was ready ...

Hydraulic actuators are characterized by fast dynamics, high power density, high stiffness, large output force/torque, and in recent years are becoming increasingly attractive in the field of robotics ...

David Hamblen, 'Rotary Valves are American.' Music Journal, XX (March, 1962), 58. Anthony Baines, European and American Musical Instruments (New York: Viking Press, 1966), 147. Thomas Longworth, ...