Big Radial Engine

[silver_bullet]

Got to see the Confererate Air Force attend a show when I was a kid... My Uncle flew F4-U's in WWII ... I was hooked ever since...

[Beagle]

old war movies, you can see the guys walking the propellers through, I had to ask.. Why? Prevent hydraulic lock. Same reason they smoke like an SOB when they start I guess... Apparently they did that at intervals when the bird was supposed to be ready to go.

Nitrous, meth injection, turbos, blowers... we don't really have anything new for those old birds. As I understood it, the flight mixture was controlled via lever and cylinder head temperature.

[oletrux4evr]

Dad still likes to tell of changing out the 28 cylinder roundy beasts that displaced 4300+ cubes. Said the specified torque in the for some of the nuts was "One large man at end of 6 foot breaker bar, 3 jerks."

Sounds like the torque value for a Beaver prop.......

old war movies, you can see the guys walking the propellers through, I had to ask.. Why? Prevent hydraulic lock. Same reason they smoke like an SOB when they start I guess... Apparently they did that at intervals when the bird was supposed to be ready to go.

Gravity wins.....oil runs down into the bottom cylinders when the engine is static.

Nitrous, meth injection, turbos, blowers... we don't really have anything new for those old birds. As I understood it, the flight mixture was controlled via lever and cylinder head temperature.

Exactly how it's done.

[1970camaroRS]

old war movies, you can see the guys walking the propellers through, I had to ask.. Why? Prevent hydraulic lock. Same reason they smoke like an SOB when they start I guess... Apparently they did that at intervals when the bird was supposed to be ready to go.

In movies? I pull props on a B-25 every weekend during the summer. Its not an easy task either, takes at least three people...or someone like me and one normal sized person. Oil gathers in the bottom cylinders and is insufficeint in the upper cylinders after a long enough period of time. Pulling the props clears oil out of the lower cylinders and pre-oils the uppers. We pull 6 full rotations or until oil streams out of the exhaust.

[okie300c]

nice