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I use to program the F-15 central computer. One went down in Alaska. The computer was underwater for 2 weeks. Once retrieved, we washed the core memory boards in distilled water. We were able to determine the state of the jet when it lost power.

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Did the F-15 use an IBM 4π computer or something else? What language did you use to program it. (I think aerospace computers are underappreciated, so I'm interested in whatever you can tell me about it.)

That information may be sensitive. The F-15 platform is still under active development, and even if it wasn't those details might be too much to ask.

Arguably, the fastest fighter jet computer in the world is in a U.S. Air Force F-15E. It’s the Advanced Display Core Processor II (ADCPII) and it’s capable of processing 87 billion instructions per second.

http://www.boeing.com/features/2016/08/f15e-fastest-computer...

Sounds like they've moved on from the IBM 4π.

Do F-15s not have flight data recorders? The NTSB is generally able to figure out the state of the jet for all airliners that went down by looking at the FDR.

Hardly any of the shuttles even had flight data recorders.

I could potentially see not wanting to have something like that in military hardware, especially if it falls into enemies hands.

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