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Old 3rd November 2014 | 13:22
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Peter H
 
Joined: Jun 2008
Posts: 240
Likes: 35
From: Cambridge UK
BOAC: The 2nd column of the 3rd page (numbered 56) of
http://www.boulder.swri.edu/suborbit...Spacecraft.pdf
states that:

Two main pneumatic 625-psi actuators with a 9.5-in bore and 31-in stroke, change the position of the feather ...

http://en.wikipedia.org/wiki/SpaceShipTwo
has a tiny image of the craft, but it's pretty unreadable even if you click to enlarge.
http://en.wikipedia.org/wiki/File:Sp...al_diagram.jpg
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