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Been getting a number of '503 Error' pages over the last half hour, including when trying to log off.

Hello all, I tried to start a thread on some aircraft work I'm doing, mostly for correctness. I hit 'Summit New Thread', everything went ok, redirected me back to the relevant form, and poof, not there. Came back an hour later to see if it was there and it wasn't. Is that some sort of...

Hi guys, How did Second World War aircraft measure speed? I always assumed the Americans and British would use miles per hour and the Germans use kilometres per hour but I recently read something that suggested airspeed was measured in knots? I'm interested to know - specifically what...