Napier Sabre
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Napier Sabre
I am extremely interested to the distribution system (inlet&outlet valves) adopted on the powerful Napier Sabre series engines. (particularly to 1120A) Any info will be useful. Thanks in advance.
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Revolution..
Varjag, I am looking for drawings about the valve system of the 24 cylinders H shaped Napier Sabre: its own valve system was completely revolutionary in both senses. Revolutionary because never seen before and revolutionary because it was made of rotating pipes instead of alternative "fungus-shaped" valves. Have you any drawing about?
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Hi Gabriel,
Napier Sabre was sleeve valve engine (contrary to typical poppet-valve designs, like R-R Merlin). Sir Harry Ricardo was pioneer behind the development of viable sleeve valve engine. The principle was quite common in British service, most notable were Sabre, Bristol Hercules and Centaurus. Below there is 2 pics of sleeve arrangements of Bristol Hercules sleeve-valve radial, sorry don't have pictures of Sabres sleeves, but maybe those help,
napier sabre 1
napier sabre 2
hercules sleeve 1
hercules sleeve 2
Links for additional information;
http://www.cpmac.com/~cmcgarry/napier/napier.html
http://www-g.eng.cam.ac.uk/125/achievements/ricardo/
(picture credits: http://www-g.eng.cam.ac.uk/125/achievements/ricardo/ and http://www.enginehistory.org )
Mark V
Napier Sabre was sleeve valve engine (contrary to typical poppet-valve designs, like R-R Merlin). Sir Harry Ricardo was pioneer behind the development of viable sleeve valve engine. The principle was quite common in British service, most notable were Sabre, Bristol Hercules and Centaurus. Below there is 2 pics of sleeve arrangements of Bristol Hercules sleeve-valve radial, sorry don't have pictures of Sabres sleeves, but maybe those help,
napier sabre 1
napier sabre 2
hercules sleeve 1
hercules sleeve 2
Links for additional information;
http://www.cpmac.com/~cmcgarry/napier/napier.html
http://www-g.eng.cam.ac.uk/125/achievements/ricardo/
(picture credits: http://www-g.eng.cam.ac.uk/125/achievements/ricardo/ and http://www.enginehistory.org )
Mark V
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What a surprise! I knew Sir Ricardo by mean of his own over-head pre-heating combustion chamber developed on common duty FIAT diesels and I never suppose he was also the father of the sleeve valves cylinder-side mounted 4 strokes aero-engines...a genius less known than Sir Wallis but not less effective against the Reich. A disciplined mind is always the best weapon. Thanks a lot.