Lot's of good practical general information on a variety of engineering and scientific topics in the EW and Radar Handbook compliments of the USN.
The Table of Contents.
The table of constants, conversions and characters is a convenient summary. The Mach Number and Airspeed vs Altitude is well written. I haven't had time to browse through it all but it looks like a good resource or refresher for people looking for some general technical information about aircraft dynamics, radars, databusses, antennas and things like that.
