Used: An item that has been previously used. The item may have some signs of cosmetic wear, but is fully ... Read moreabout the condition
Please note that this is the same item as listed in a different section - http://www.ebay.co.uk/itm/190666771299?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649
If you are interested, please bid for it there.
RAF Navigation Computer
Computer Dead Reckoning Mk 4A, complete with grey protective sleeve
Used, but in perfect working order
A multi-purpose computer suitable for both flying club and high-performance aircraft (speed range 50 – 800 knots). The front side is for working out course to steer and groundspeed, by calculating wind effect on direction and speed - graphical solution of the triangle of velocities, if you care about these things. Or if you know your track and groundspeed you can even work out the wind.
The rear face is a multi-function converter – a circular slide rule for multiplication/division, working out ETA, conversion between statute miles, nautical miles and kilometres, between IAS/TAS and Mach Number.
This ‘whizzwheel’ has flown thousands of miles with me over the years and is still going strong (to be fair, there isn’t much to go wrong!).