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Sunworshipper[_3_] Sunworshipper[_3_] is offline
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Default Anyone up for making a B-17 restoration part?

On Tue, 31 Aug 2010 22:46:27 -0400, Phred
wrote:

On Tue, 31 Aug 2010 21:22:36 -0500, Sunworshipper
scribed:

On Tue, 31 Aug 2010 20:03:32 -0400, Phred
wrote:

On Tue, 31 Aug 2010 19:02:38 -0400, Bob Engelhardt
scribed:

Phred wrote:

http://www.metalworking.com/dropbox/B-17_Part.pdf


Thanks Bob... Not too familiar with how the "box" works... Plus I've
been getting the IMTS show exhibit together for the last week. Just
shipped today... Thank the God's!

I reckon this part would be for the steering column? Were not the
B-17's still controlled with wire steering? Ailerons? I dinna know
that much, but I do have a B-17 flight manual somewhere... I'll try to
look it up.

Thanks again,

Fred V. Fowler III



I certainly don't have the time and pulling out of that groove is over
my capabilities. But, even looking at it sideways, I wouldn't put in
the two circular grooves on the sides to reduce weight. The most of
the stress if it binds will be on the outsides of the cable rapped
around. What's a cubic inch of aluminum for a proven war bird that
will never carry again what it was designed for.

Like the other post, probably trim, the main yoke would be 5-6" dia.
not 2.5"

SW


Trim control sounds about right... Much less turn than rudder, and the
dimensions sound about right for tight control over a smaller drum
size and force, more precise control anyway... Or is the bigger the
drum, the more control you have? I was never a physics or calc guy...
I know the bigger a micrometer head, the more precise it is, probably
just cause there are just bigger graduations, more widely spaced,
thus, easier to read and interpret and "split the lines"...

My 0.02 cents...

Fred III

I'll ask the restoration people.




ELEVATOR TRIM TAB CONTROL – Elevator trimming is accomplished by
means of a tab in each elevator. Each tab is operated by a rod at the
cable drum
assembly mounted in the elevator. A knurled thumb nut on the left side
of the
control stand provides a friction brake to prevent creeping of the tab
control.
3/32-inch 7 X 7 cables, looped around the drum in the engine control
stand
follow substantially the same course as the copilot's elevator cables.
The cables
extend along the aft side of the elevator torque tube to the drums
which operate
the actuating struts at the tabs. The circuit is completed by means of
a “messenger”
cable which is routed through the center of the torque tube to a
second drum at
each actuating strut.

Sounds like there are at least two on the plane. Bet if you look in
the tail you'll find one to go by.


SW