Thread: Bird Watching

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Originally Posted by rspears

I referenced P&W for the R1820 but it was actually a Curtis-Wright design - nine cylinder radial, single row. Apparently the R1820 was also built under license by Lycoming, Pratt & Whitney, and even Studebaker during the war. The R3350 was two R1820's stacked, but used a slightly shorter stroke. Most had seven or nine cylinders per row, but I read that they experimented with an eleven cylinder design that never was used in production. Whoever thought of the single throw crank, master rod design was a smart cookie, in my book.

how about the sopwith camel the crank was bolted on the fire wall and the jugs spun around the crank. some think roller lifters are new i like the old radials but like the corn cobs and i am more of a liberty /merlin /alisons guy . the 540 lycoming engines are cool have seen some built and hone out some jugs on one they have some choke in the bore .l like the history of the old lost oil engines with valve springs that look like bed spring cool stuff like this at wrigth pat museum