what is a wiz wheel
The whiz-wheel (or circular slide rule) is a handraulicly operated flight computer which only works if you practice with it, you perform you SDT calcs, fuel consumption calcs, wind drift calcs etc on it...the benefits are it does not need batteries, does not break when dropped and will continue to function even when the yanks reactivate the selective availability on the GPS when DS # 2 kicks off in a few weeks time.