Jim Macklin wrote:

For in-flight use, the wiz-wheel is handy to see proportion,
set the air speed and then distance/time are all visible by
inspection, no need to press any buttons.
Electronic calculators and PDAs don't impress the unwashed,
they have iPods. But a wiz-wheel will get their attention.
Besides, even Spock used a full-size E6b on an episode of
StarTrek to navigate deep space.

Yes, the try to do a wind triangle problem in flight with a wiz wheel.
Calculators are much easier for this. Sure, simply time-rate-distance
and fuel consumption and similar stuff is fairly easy. It is the vector
problems that are a pain.


Matt