2 pulleys on a base giving a step up ratio of 3.75.
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GRAVESANDE – Ring and ball, mounted on separate handle ball.
An apparatus for demonstrating thermal expansion, comprising a captive brass ball secured to a mounted brass ring by a chin, Ring mounted on rod with a wooden handle. The ball passes through the ring when cold but will not pass through after being heated.
It consists of a powerful fixed cylinder engine with a slide valve driven from a crankshaft eccentric.
The engine is provided with a double take-off pulley and is mounted on a metal base.
The engine model comprises a section cut metal cylinder covered with transparent acrylic plate to observe the working parts -piston, valves, link motion and reversing methods.
The movement of wheel is very light to demonstrate the working even by blowing through mouth. Mounted on a moulded metal base.
This is a demonstration model with oscillating cylinder, safty valve and whistle and throttle valve, fuel heated.
The model is mounted on a metal base.
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