And what country can preserve its liberties if their rulers are not warned from time to time that their people preserve the spirit of resistance? Let them take arms. The remedy is to set them right as to facts, pardon and pacify them. What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
Quite a history on these engines. I read that they were originally for aircraft (Lancaster, deHavilland Mosquitos, Spitfires) but this version was apparently developed for tanks. Sounds lovely, bet it would purr with the right silencers and exhaust.
That's a Rolls-Royce Meteor engine. It's a Merlin V12 without the supercharger and was used in tanks such as the Comet and Centurion. It revs lower than the Merlin and only makes around 600hp. Al_in_Ottawa
There are differing schools of thought regarding any need for backpressure in an exhaust system with regard to power. All engines are different, with some engines running better with some backpressure and some designed for a more free flowing exhaust. But even those engines that are built for zero back pressure operation need some sort of header or manifold to scavenge some the heat of exhaust gases away from the exhaust valve. I wouldn't run that expensive thing for very long like that because you will torch your exhaust valve chamfers and seats.
The exhaust valves for Merlins and P&W R2800s were made from a high nickel content steel alloy and had hollow stems filled with liquid sodium to distribute heat away from the head. The overhaul time for a Merlin is 75 flight hours! A Cessna 185 engine can go to 1,500hrs in comparison. Al_in_Ottawa
Quite a history on these engines. I read that they were originally for aircraft (Lancaster, deHavilland Mosquitos, Spitfires) but this version was apparently developed for tanks. Sounds lovely, bet it would purr with the right silencers and exhaust.
ReplyDeleteVery cool!
ReplyDeleteWOW!
ReplyDeleteMerlin V12 and Pontiac V8. Pinnacles of production piston.
ReplyDeleteThat's a Rolls-Royce Meteor engine. It's a Merlin V12 without the supercharger and was used in tanks such as the Comet and Centurion. It revs lower than the Merlin and only makes around 600hp.
ReplyDeleteAl_in_Ottawa
Wonder why 3 fire extinguishers are needed on standby?
ReplyDeleteBecause it identifies as an EV.
DeleteThere are differing schools of thought regarding any need for backpressure in an exhaust system with regard to power. All engines are different, with some engines running better with some backpressure and some designed for a more free flowing exhaust. But even those engines that are built for zero back pressure operation need some sort of header or manifold to scavenge some the heat of exhaust gases away from the exhaust valve. I wouldn't run that expensive thing for very long like that because you will torch your exhaust valve chamfers and seats.
ReplyDeleteThat has to be brutally loud without an exhaust manifold.
DeleteThe exhaust valves for Merlins and P&W R2800s were made from a high nickel content steel alloy and had hollow stems filled with liquid sodium to distribute heat away from the head. The overhaul time for a Merlin is 75 flight hours! A Cessna 185 engine can go to 1,500hrs in comparison.
DeleteAl_in_Ottawa
Seeing the fire coming out at the valves is cool.
ReplyDelete