Back محرك ستيلزر Arabic Stelzerův motor Czech Stelzer-Motor German Motor Stelzer Spanish Motore Stelzer Italian سٹیلزر انجن PNB Stelzerjev motor Slovenian
The Stelzer engine is a two-stroke opposing-piston free-piston engine design proposed by Frank Stelzer. It uses conjoined pistons in a push-pull arrangement which allows for fewer moving parts and simplified manufacturing. An engine of the same design appeared on the cover of the February 1969 issue of Mechanix Illustrated magazine.