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I saw a slide valve engine on this sight recently and traced the builder to the site below, a very elegant design as are all the other designs at this site.http://www.metallmodellbau.de/Sleeve_Valve_Engine.php
When I looked at that animation a few days ago I wondered whether the small centre cylinder is just a way of achieving the sleeve linkage geometry or is it the injector pump?AS
Napier Sabre barely saw reliable service,
did the others make it off the test stand? They were too late. Bristol was flying them in the early 1930's through the 1950's when jets replaced those in service.
Quote from: Graham Meek on December 02, 2014, 08:46:00 AMI saw a slide valve engine on this sight recently and traced the builder to the site below, a very elegant design as are all the other designs at this site.http://www.metallmodellbau.de/Sleeve_Valve_Engine.phpThat's a useful link - thanks!He used "ETG100" for the sleeve - I've never heard of it, but googling suggests it's a swiss special-purpose steel. Googling equivilents suggests SAE4137 (which is a stainless, isn't it?). WHat would people suggest as an alternative that is reasonably easy to machine, doesn't need heat treatment and can be bought in small quantities in the UK (or any two out of three of those!).
The Wiki page for the Sabre isn't so kind and books I've read said much the same.
First job is to play with blower-induction.
At model scale positive displacement is the only effective method. Fans need extremely high RPM at this size to generate the pressure you're expecting.
I didn't know that there were over 3000 Typhoon's built.
How did you measure those crankcase pressures?