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25 votes
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What are the differences between the MiG 31 and MiG 25 (if any)?

The MiG-31 is an all new design with higher strength for low-level flight and new engines. The reason it looks just like the MiG-25 has to do with the structure of the Soviet aviation industry. The ...
Peter Kämpf's user avatar
12 votes
Accepted

Can stainless steel replace titanium for Mach 3+ speeds?

Both the MiG-25 and MiG-31 designs had engines that would overheat and be damaged an anything past Mach 2.83, so both planes were limited by this. Typical speeds were closer to Mach 2.5 to extend the ...
fooot's user avatar
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8 votes

Can stainless steel replace titanium for Mach 3+ speeds?

Let's note some properties of steel and titanium. For steel, we choose 4340 alloy (oil-quenched and tempered); for titanium, we use the Ti-6Al-4V alloy (solution heat-treated and aged). These are not ...
Sanchises's user avatar
  • 13.4k
6 votes
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What are these protruding things on this Russian military aircraft (MiG-31BM)?

The upper thing is a mirror for the WSO's (rear seater's) periscope. It gives that position some forward visibility when extended. Without it, I doubt that position could see the runway. There are ...
BowlOfRed's user avatar
  • 5,621
2 votes

Why do the engine of MiG-31 spit out flame when going for afterburner?

The thumbnail of this video is a little misleading (it isn't from the same video), but show the same phenomenon. The video has a different angle from a little further behind (also at a completely ...
Erin Anne's user avatar
  • 838
2 votes

Can stainless steel replace titanium for Mach 3+ speeds?

There has been a supersonic aircraft made from steel, the XB-70 Valkyrie, up there with the SR-71 in the exclusive club of awesomest planes. It was made of stainless steel/honeycomb (with a bit of ...
Koyovis's user avatar
  • 61.8k
2 votes

What are the differences between the MiG 31 and MiG 25 (if any)?

Answering it from another point of view, the MiG-31 had to be the better MiG-25 mixed with the advantages of the Tu-128 As the Successor of the Tu-128 (the Tu-148,T-58M / T-6 and the Yak-33) did not ...
alfetta's user avatar
  • 96

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