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B-17s at Low Level



 
 
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  #42  
Old March 15th 04, 02:02 AM
Dave Holford
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ArtKramr wrote:


I assume that this was not on a combat mission.






"A boring holes excercise"

You really should read the postings Art.

Dave
  #44  
Old March 15th 04, 05:45 PM
M. H. Greaves
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I remember seeing on T.V. that the B17 had like big long screw gears/rods
that raised and lowered the u/c in that case the u/c would have been
electrically operated wouldnt it!?? i.e. not hydraulically operated.
wrote in message
...
Not that it applies to the B-17, but I would think that unless hydraulic
flaps were preloaded (spring or other or were heavy) to extend without
hydraulic pressure, the airflow would keep them retracted until airspeed
decreased or even until the a/c got on the ground. As for the gear,
unless it was kept in the retracted position by hydraulic pressure
alone, as on many modern light aircraft, the mechanical uplocks would
keep the gear up. Also, depending on gear door operation, the airflow
could very well keep the doors closed, or at least partially closed,
until airspeed decreased. Lack of pressure could also just allow the
doors to stay closed & the gear stay up regardless, depending upon how
they're actuated.



  #45  
Old March 15th 04, 07:53 PM
Dale
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In article ,
"M. H. Greaves" wrote:

I remember seeing on T.V. that the B17 had like big long screw gears/rods
that raised and lowered the u/c in that case the u/c would have been
electrically operated wouldnt it!?? i.e. not hydraulically operated.



Correct, it's a jack screw that operates the gear and it is powered with
an electric motor....the same motor used to power the flaps...and the
tailwheel. Each gear has it's own motor.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html
  #46  
Old March 15th 04, 11:51 PM
M. H. Greaves
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thanks, i thought so!
"Dale" wrote in message
...
In article ,
"M. H. Greaves" wrote:

I remember seeing on T.V. that the B17 had like big long screw

gears/rods
that raised and lowered the u/c in that case the u/c would have been
electrically operated wouldnt it!?? i.e. not hydraulically operated.



Correct, it's a jack screw that operates the gear and it is powered with
an electric motor....the same motor used to power the flaps...and the
tailwheel. Each gear has it's own motor.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html



 




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