Space/Science — HabitableZone

Space/Science » in reply to More about titanium

Craziness

Good point!

And to put "expensive" in context, at the time the shuttle decision was made, we had already built the titanium SR-71, and very extensive use of titanium was included in some of the commercial SST designs (since the goal was Mach 3 -- Concorde's M 2.2 derived from the max heating an aluminum structure could take).

So, while Ti was expensive, it had already proven feasible and worth it for other specalized, high-value aerospace applications. It wasn't a speculative new thing that they rejected -- the tiles + alumnium was the speculative new thing. A slightly unfair comparison since you still would have had to handle much higher heating than on a Mach 3+ aircraft, but still, it's not the alternative to the tile system was carving it out of diamond or something crazy like that.

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