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Old February 7th 07, 03:56 AM posted to rec.aviation.piloting
F. Reid
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Posts: 14
Default Windmilling and electrical power

On Feb 6, 7:53 pm, Mxsmanic wrote:
Yes. I also know that not all props have adjustable pitch, and that
the fully feathered position on a prop will not necessarily be exactly
parallel to the wind.


Sorry everyone but I am gonna feed the troll here.Most of the props
that I have seen fethered are actually feathered enough to stop or
spin very slowly.

I suppose the question can apply to jet engines as well, but someone I
doubt that they would windmill with speed sufficient to generate
useful power, and I'm not sure which stage of the engine drives
generators, anyway.


Not sure what you are asking here, but a jet engine will not
feather .The fan blades are not adjustable.The compressor section
drives the generator, but it will not spin fast enough to generate
electricity (Even with a CSD).What is interesting is that it will
indicate oil pressure and with this indication (And the absence of
vibration) a restart is recomended.

Obviously windmilling itself is practical, since some aircraft have a
tiny deployable windmill specifically for this purpose.


All of the ER versions of 2 engine transport category jets have this
function.

--
Transpose mxsmanic and gmail to reach me by e-mail.


Sorry about feeding the troll guys, but he ask a question that I
actually knew something about.