Thread: Discussion Tupolev model 91
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Old Oct 08, 2012, 08:41 PM
jonquinn is offline
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the CIA apparently did get some soviet titanium alloy for the SR-71, but most was made by US companies after they figured out how to reproduce the alloy (Ti-13V-11Cr-3Al). This is what most of the skin was made of. The engines used a different alloy for the first stage blades (8-1-1 I think). It probably had 6-4 alloy for bulkheads.
Titanium Metals Corp I know made it and probably the old Crucible metals too.
The alloy is hardly ever made anymore, replaced by slightly easier to make alloys.

there is a ukranian company called Unicraft that makes limited runs of resin model airplanes, mostly 1/72 scale. they have a model of this airplance, but not inexpensive

http://www.unicraft.biz/on/tu91/tu91.htm
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