There have been many engine valve designs since the dawn of the internal combustion engine. What made poppet valves stick? (See what we did?) There were many other designs and some, like the sleeve valve in the Bristol Centaurus WWII radial aircraft engine, that worked very well. Classic Kevin Cameron stuff here as he and Mark Hoyer discuss the relative merits of engine valve types. <br /><br />Looking to buy? Get prequalified<br />https://octane.co/flex/1?a=171 <br /><br />Become a Channel Partner: https://octanemedia.co/home/become-an-advertiser/<br />Listen on Spotify: https://open.spotify.com/show/6CLI74xvMBFLDOC1tQaCOQ<br />Read more from Cycle World: https://www.cycleworld.com/<br />Buy Cycle World Merch: https://teespring.com/stores/cycleworld
