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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
5 votes

Why does the MiG-25 have silver-coated panels?

As you have pointed out yourself, the Silver is there because it is highly reflective. The panels around the engines were coated with silver to prevent the heating of the fuselage around it. According ...
aeroalias's user avatar
  • 100k
4 votes

Why does the MiG-25 have silver-coated panels?

With fire, heat transfer via radiation is usually very significant. The hot gasses have fairly low heat conductivity, and can be kept off the walls by suitable flow pattern, but give out a lot of (...
Jan Hudec's user avatar
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3 votes
Accepted

How much of the Mig 25 utilized vacuum tubes?

From the Russian sources here and here it is seen that Mig-25 used vacuum tubes. However these where not the usual large vacuum tubes from consumer electronics, already obsolete at that time. Mig-25 ...
h22's user avatar
  • 12.1k
3 votes

Did every X-15 pilot become weightless when flying into the upper strato- and mesosphere?

Yes they did. Take away both rocket thrust and wing lift, and the plane goes into free fall. In this condition everything on board becomes weightless. The pilot would feel only the light bursts of ...
Guy Inchbald's user avatar
  • 7,062
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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