Reed Valve V Rotary Disc Intake and why small 2 stroke engines favor the later.

Описание к видео Reed Valve V Rotary Disc Intake and why small 2 stroke engines favor the later.

The reasons why small 2 stroke engines favor Rotary disc over Reed valve intake systems.

The main reason for this being the large capacity engine has more gas inertia to overcome back flow in transfer port during low speed operation.

At higher speeds the Rotary discs has better gas flows due to the fact a Reed valve has a pressure differential each side of it.
that is also somewhat overcome by the large capacity 2 stroke engine.

For these reason you will only find rotary disc valve intake system on smaller capacity 2 stroke engine and reed valve on all large capacity 2 strokes form about 125 cc per cylinder upwards.

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