Technikatörténeti szemle 13. (1982)

TANULMÁNYOK - Szabadváry Ferenc: Leonardo da Vinci: Efficiency Problems of Technological Inventions

Picture 9. Control of circular motion by means of a pendulum, by LeoPicture 10. Automatic roasting spit by Leonardo. The „hot-air turbine" makes the spit rotate with a speed controlled by the flow of hot air. The «4» if**- ^fofr/W hotter the fire, the higher the speed of rotation. ' —^ff «

4 !» • - . - f» (Codex Atlanticus, from Réti—

Dibner)