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Turbo propellers  
User currently offlineGopal From United States of America, joined Jun 1999, 116 posts, RR: 0
Posted (17 years 5 months 3 weeks 5 days 23 hours ago) and read 1241 times:

How are turbo propellers different from piston engine driven propellers? The early aircraft used in WW-I were piston engined, I am sure. But were turbo props used in WW-II bombers like the B-29, B-17 etc? Piston engines were IC engines where reciprocating movement of the pistons was translated into circular movement by gears and other machinery. How are turbo props different? Would appreciate any information on the subject.

3 replies: All unread, jump to last
User currently offlineMD-11 From , joined Dec 1969, posts, RR:
Reply 1, posted (17 years 5 months 3 weeks 5 days 22 hours ago) and read 1238 times:

In a turboprop engine, the propeller is turned by the turbine to which it is linked. The connection is geared down quite a bit though cause the turbine is turning way too fast to be turning the propeller just as it is. Basically I'd say that the turboprop engine is just like a jet engine, except that the turbine is linked to a propellor which it turns.

User currently offlineScott From United States of America, joined Sep 2005, 0 posts, RR: 1
Reply 2, posted (17 years 5 months 3 weeks 5 days 17 hours ago) and read 1238 times:

To answer about the B-29,B-17 Ect.,no,they were'nt turborpops,but they did have some big beautiful radials!Like MD-11 said, Turboprops basically are jet engines with a gear box reduction,where as the pistion engine had no gearing down.Something interesting about turboprops,is that they are almost always running at 100% power,and the only thing the pilot controls are the prop pitch levers.

User currently offlineAviator_ua From , joined Dec 1969, posts, RR:
Reply 3, posted (17 years 5 months 3 weeks 4 days 20 hours ago) and read 1238 times:

In WWII alot of the bombers were powered by radial engines.
These were the huge engines with as many as 24 cyls.
As far as the propeller, the only real differences I can see are that of course they are constant speed, they are usually bigger in diameter too.
Usually fully reversable. The blades are more stout also.
Most are featherable. Which is to say in case of an engine failure, the blade angle can be set to align itself with the relative wind causing much less drag.

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