Max Richter wrote:
Hallo,

i am wondering why American aircraftradialengines have no aerodynamical
spinners.Airplanes with inlineengines like P51;P40;P38 and so on have
aerodynamical optimized spinners.
And German radialengines had spinners like the FW190.Zero=B4s and other
Japanese aircraft had them.
What is the reason why the wellbuild American aircraft had just a little
hup on their propellers.
Thank You and greetings

Here's an example of one aircraft's evolution regarding spinners -- and
on-topic for the NG! g

XSB2C-1 & prod. -1's had a spinner w/ a 3-blade prop.
SB2C-3 w/ a 4-blade prop had no spinner.
SB2C-4 w/ a 4-blade prop had a spinner.
And finally the SB2C-5 had no spinner w/ it's 4-blade prop.

Just by looking over various pubs of the naval a/c which came out of
WWII (and those at the start) -- almost all had spinners at some point;
some only in the X-version. But the F2A (FWIW) had the spinner up
until the -3 version (which never saw front-line service.)

It would seem no version of the F4U had spinners.

The F8F had no spinner, yet at least one after-war modified Bearcat
racer had a very larger spinner.

Can't address what it means except to note that by the war's end, no
front-line naval a/c had spinners. The other comments all seem
logical, yet the SB2C evolution appears rather strange.

MW