A Sleeve Valve Almost Took Over A Poppet Valve Unit

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This video is fair use under U.S. copyright law because it is transformative in nature, uses no more of the original than necessary and has no negative effect on the market for the original work.
- Credits -
“Bristol Perseus engine from Blackburn Botha on Llwytmor” by The 79 Netherley
• Bristol Perseus engine...
“Willys Knight Sleeve Valve Engine Cutaway” by cavesun2
• Willys Knight Sleeve V...
“1924 Willys Knight Sleeve Valve Engine, Head Removed, Showing Sleeve Operation.” by Busman
• 1924 Willys Knight Sle...
“Bristol Hercules Sleeve Valve” by Patrick Smart
• Bristol Hercules Sleev...
“Knight Sleeve Valve Engine” by oisiaa
• Knight Sleeve Valve En...
“Sabre VII Engine” by Bullet Rajah
• Sabre VII Engine
“Napier Sabre sleeve valve operation” by Hawker Typhoon RB396
• Video
“Bristol Hercules Radial Aircraft Engine Demonstration” by Johan Christersson
• Bristol Hercules Radia...
“924 Bristol Centaurus Test” by kevok2
• 924 Bristol Centaurus ...

[@HomebrewSubaru]

That radial engine stuck in the rocks... great way to start the week with some history. Sleeve valves, who would have thought?

[@Iggy900ss]

Even Ferrari experimented with sleeve valves, for a Formula 1 engine, between 1989 and 1992. It gave good results, revving up to 11000 rpm, but unfortunayely the project was abandoned because they could not spend more money on that. By the way, Visioracer, your videos are always very interesting, good job !

[@chesspiece81]

Visio I have been watching your videos since 2015 or 2016. The fact that you not only document and upload everything related to combustion engines of all types and document what makes them unique when introduced and what still makes them unique/significant currently is what makes your channel so good and why I've been following your channel and content for so long. Thank you for the content and time and energy you put into creating it. I really really appreciate it.

[@hoost3056]

The sleeve valve engine design is one of my favorites. If that design coupled with modern materials and processes were further developed, we would have seen some truly powerful and clean running reciprocating engines. By the way, you missed Voisin as another manufacturer that used sleeve valve engines.

[@asktherightquestions3599]

Dude I love the amount of info you gather for engines and cars. Keep it up bud

[@localsheriff]

Though being a car guy I love in-depth study of alternative engines from out-of-car usage like you do here! I feel respect for what history's inventors had to go through of test and failures before the combustion engine became how we know it today. Will we see a clip covering a variety of steam engines in the future...? The glove has been thrown...

[@upsidedowndog1256]

Thanks for showing aircraft engines.

[@yur1831]

Wow, never knew something like that existed. Great job dude😉!

[@Iowa599]

I elect this subject for a revisit. Your English has improved dramatically!

[@johndavey72]

Thanks for that. Very well explained. I nearly understood what happens inside a sleeve valve . It' s the engineering these pioneers thought of that makes me wonder how did they know this would work . Amazing!!

[@beaterbikechannel2538]

Fascinating stuff. I love your vids Visio.

[@ushimisako]

Thank you for digging around and gathering all this information. I´ve never heard about this technology ! Great video , keep it up !

[@Durbanite2010]

Good video as always. Bristol also had the Taurus sleeve-valve engine (smaller and less powerful than Hercules).

[@freerkderuiter8822]

Too bad you didn't mention Avions Voisin. Voisin used sleeve valve engines for it's cars and before that it's planes. The Avions Voisin sleeve valve engine used the Knight principle but with some improvements especially to the lubrication. It was possible for a sleeve valve to fall into the crankcase if it became detached from the connecting rod. Voisin also had a solution to that problem.

[@DontKnowHowToTypeIn2]

that looks so incredibly overengineered.

[@mandernachluca3774]

Good video as always.

[@jaredgreen5840]

I'm always learning something new from your channel ☺👍

[@Surestick88]

I've always wondered how a sleeve-valve would do in something like a single-cylinder dirt bike engine.

[@lisalouisekeen4191]

Well I certainly learnt something new. Thank you.

[@richardtibbetts5020]

Never heard of those until now..thanks!