Single Valve System (SVS)

The single valve system (SVS) is the most commonly used valve system on LEGO HVLP reciprocating engines. It consists, as the name implies, of a single crank operated slide valve. The valve opens and closes a single part that, with the help of an "L" shaped panel part on top of the valve, is used to direct airflow both in and out of the engine. This type of engine has been used for notable power pulls as well as to achieve relatively high revolutions.