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13 votes
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What advantages would a triangular shaped spy plane have over a an SR-71?

The 'triangle' wing design that you refer to is pretty common. It is called the delta wing design and is used in a number of high speed aircraft, for example, the North American XB70 Valkyrie. In ...
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11 votes
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Is there currently any heat shielding and paint for speeds of up to Mach 6?

I'm reasonably certain the speed limit (so to speak) on the SR-71 wasn't to prevent its skin from melting. The hottest the skin got during flight was less than 600 C. That's definitely hot--but it's ...
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9 votes
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SR-72 --- is the speed reported in this story wrong?

is the speed reported in this story wrong? No No it is not a misprint that the SR-72 is intended to be capable of Mach 6 From the horses' mouth: Envisioned as an unmanned aircraft, the SR-72 would ...
6 votes
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Is there an "SR-72" under development?

Yes, the SR-72 project has indeed been officially announced. Lockheed confirmed it to Aviation Week back in 2013. Apparently it actually did get quite a bit of attention at the time, enough to ...
  • 19.1k
4 votes

SR-72 --- is the speed reported in this story wrong?

While I'd in general remain sceptical of anything that Sky News talks about the numbers do seem realistic. Aviation Week (amongst others) have mentioned similar speeds and they're not beyond the realm ...
  • 1,500
2 votes

Is there currently any heat shielding and paint for speeds of up to Mach 6?

The SR72 is not a variant of the Lockheed SR71 but an entirely new, unmanned high speed reconnaissance and strike vehicle being proposed by Lockheed Martin. The designation is obviously intended to ...
1 vote

Is there currently any heat shielding and paint for speeds of up to Mach 6?

The top speed achieved by the North American X15 was Mach 6.72 according to what I read. The heating effect on the airframe caused by air friction at this speed will depend on the altitude. Obviously ...

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