> On Jun 19, 2015, at 8:31 PM, Dennis Boone <[email protected]> wrote:
>
>> Bringing this topic full circle, does anyone know if any minicomputers
>> (DEC PDP-8s or 11s, DG Novæ, HP 21XXs, et cetera) were ever used on
>> aircraft? Not transported by one, but I mean setup and used on one.
>
> A friend of mine worked for DoE in Nevada. They used to fly minis on
> helicopters (detectors of some sort). I think he said they were Novas.
Speaking of weird military applications of small computers, I still have a
paper from the early 1980s about using Ethernet and a small PDP-11 to measure
nuclear warhead yield.
The scheme goes like this: run the Ethernet coax cable down the hole at the
bottom of which sits the warhead being tested. The PDP-11 is at the top of the
hole. At T=0, start sending back to back Ethernet frames. Record the TDR
value associated with the transmit error for each failed transmit, and send
that to the data collection site which is some miles away.
The changing TDR value will tell you how fast the Ethernet cable is evaporating.
I’m fairly sure this was real, not a made up story. I should dig up the paper,
it’s just one page long.
paul
