skymstr02 wrote:
zorro7 wrote:
p.s Does that look like a DC-3 prop to you folks?
A DC-3 prop is too small to fit on the R-2800 prop shaft. The splines on the R-1830/R-1820 are SAE 50 and the splines on the R-2800 used on an FG-1D are SAE 60 size. When you get to the F4U-5 with the larger R-2800-32W, the splines go up to SAE 70.
Actually, the 1830/1820/2600/2800A/B/Allison/Packard Merlin are SAE 50 Spline.
The later R-2800 series, 3350 and 4360 are 60 Spline.
A FG-1, F4U-1 and a DC-3 would share the 50 Spline. Even the many parts internal could be the same. There are some parts different due to the DC-3 is feathering and the Corsair isn't.
I want to say the B-25 and B-17 used the same prop/blades even though they have different engines.
I believe the F4U-5 had a R-2800-32W with a 34D60 prop and 6825A-0 blades.
F4U-1/FG-1D had a R-2800-10 or is it -8 with a 23E50.
The Blade types have different designations based on blade type. D and E and F blades are common on the Warbirds and large Transports.
Basic 3 Blade Prop types are 23D50, 33E50, 33E60, 23F60.
4 Blade- 24D50, 24E50, 24F60, 24E60.
1st number is a designation of the number of major changes to the basic design.
2nd is the number of blades.
Letter is the type of blade shank.
50 and 60 is the SAE Prop Shaft size. There is also 40, 30 and 20 Splines.
Some info-
http://www.enginehistory.org/Propellers ... mstd.shtml