F4U inverted gull wings

In article ,
hobo writes:
The link you provided has no textual information regarding the prop, but
there is a picture, dated 2001, of a surviving Corsair with a 4 blade
prop. This prop may not be the original factory issue.

When this question was first posted the first website on the Corsair I
found was this:
http://www.nasm.si.edu/research/aero...t/voughtf4.htm

This is the Smithsonian's website and has a photo of a Corsair with a 3
bladed prop and this text: "The R-2800 radial air-cooled engine
developed 1,850 horsepower and it turned a three-blade Hamilton Standard
Hydromatic propeller with solid aluminum blades spanning 13 feet 1 inch."

This website was my sole source for the claim that the Corsair had a 3
blade prop. Perhaps a 4 blade was later added, but it seems odd that a 3
blade was ever used if ground clearance was so pivotal to the whole
design.

Hobo,
All the F4U-1 models had 3-blade propellers, with a 13'1" diameter.
The later production models, the F4U-4 and F4U-5, with higher-powered
engines, had 4 blade props with a 13'2" diameter, to absorb the extra
power. (More than 800 HP in some versions.)

So, its fair to say that they didn't go to a 4-blade prop to decrease
ground clearance.

--
Pete Stickney
A strong conviction that something must be done is the parent of many
bad measures. -- Daniel Webster
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