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Questions tagged [sr-71]

The Lockheed SR-71 Blackbird was a US Air Force supersonic reconnaissance aircraft.

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11
votes
4answers
3k views

What is a ramjet?

What is a ramjet? Was it used on the SR-71 Blackbird?
40
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3answers
15k views

How did SR-71 spy, flying at 80,000 ft and 3500 km/h?

The SR-71 Blackbird is a famous supersonic reconnaissance/spy aircraft, undoubtedly one of the most amazing flying machines ever. Now, with the capabilities it had: Maximum speed: Mach 3.3 (2,200+ ...
15
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3answers
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What are the limiting factors for high altitude planes (e.g: U2 or SR71) preventing them from going higher?

I'm curious as to why planes like the U2 Dragon Lady and the SR71 Blackbird couldn't fly higher. What physical constraint set their operational ceiling? Pilots wore spacesuits, so that wasn't the ...
20
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3answers
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How do fast-flying aircraft avoid overheating?

As a follow-up question to What is the typical temperature of an airliner's hull during flight? I wonder how very fast airplanes, such as the SR-71 mentioned, avoid overheating with a total air ...
29
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5answers
9k views

Why was the production of the Lockheed SR-71 Blackbird halted?

Why was production of Lockheed's SR-71 Blackbird halted, given that it was an advanced supersonic jet that was ahead of its time?
27
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7answers
12k views

Could a SR-71 be shot down today?

I've read that the SR-71 had no missile defenses because it could simply outrun any adversary. Is this still true? Or is it unlikely that the SR-71 could operate unimpeded in the face of modern ...
11
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3answers
9k views

Why does the J58 engine of the SR-71 have a diffuser after the inlet spike?

I heard that the diffuser allows the compressed air after the inlet spike to "spread out". What does this mean? If this means expansion, wouldn't it be beneficial to have it compressed before entering ...
6
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2answers
547 views

If maximum speed was a priority for modern military fighter jets and bombers, approximately how fast would they likely be?

Burt Rutan talks rather passionately about the lack of innovation in space flight, but also mentions how fighter jet (maximum) speed performance has stalled: In fact,...
10
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1answer
4k views

How long did the SR-71 take to get to cruising altitude?

How long did it take for the SR-71 to go from taking off to 80,000 ft, including refueling?
4
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1answer
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What advantages would a triangular shaped spy plane have over a an SR-71?

This is a picture of the supposed SR-72 Aurora. What kind of advantages would this have over the SR-71, in terms of its triangle design? Paper airplanes have the same shape, and fly really well. The ...