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We applied two different methods of speed control to the Sol-a-Matic

Variable Valve Timing

In this method of speed control, the sequencing of the valves is adjusted to vary the flow / power to the engine. This is similar to more modern automotive engines.

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Variable Flow Regulation

In this method of speed control, flow is adjusted using a servo-actuated valve, which mimics the traditional governor flow control method of steam engines.

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