The Forgotten HYPER Aircraft Engines of WWII

In the early 30s, in the prelude to WWII, the US Army and the US navy needed production engines that could meet or exceed the 1 hp per cubic inch benchmark. At the time, that power output had only been achieved by several purpose-built racing engines, but no reproducible production engine had yet fulfilled this need. As a result, the US government financed several “high-performance” or hyper-engine projects, and in today’s video, we’ll be taking a look at some of these incredible, forgotten pieces of engineering… Like these videos? Support the channel on Patreon! Follow me on Instagram to get a taste of the airline pilot life: 00:00 - Start 00:27 - XI-2220 04:32 - Lycoming 7755 06:50 - Wright - R-2160 08:22 - Pratt & Whitney Sleeve Valves 09:40 - Conclusions