In the early 1900s, the sliding sleeve valve engine had some advantages over tappet valve engines of the time. For example, sliding sleeve valve designs allowed larger intake and exhaust ports, a ...

The follow-on 350 horsepower 7-cylinder R-794 was a dedicated sleeve-valve design and incorporated a supercharger. The U.S. Navy ordered five R-794s in August 1934 and tested them, but the type never ...

The Navy later sponsored a number of unconventional engine designs; however, few entered production. In the case of the 1939 XR-1740-2 development, the outcome was apparently typical of single-sleeve ...