Mxsmanic wrote:
What is a Wizwheel? It sounds almost like a slide rule.

it is. You have basically two main designs still in use,
the E6B style and the ones like the CR5; the difference is
mainly in the way you compute the wind triangles (I use
both, because I enjoy slide rules in general, but frankly,
the plain E6B is more intuitive IMHO; the CR models also
allow more complex computations, but for practical purposes
the plain ol' aluminum E6B works fine (and doesn't melt when
left on the dashboard);

Slide rules are obsolete now,

No they are not; well, ok, you are half right he they
are considered obsolte but it's a darn shame. You can spot
miles away engineers who did learn with slide rules from
those who didn't, but I digress.

Does anyone still use them for aviation?

I do; never runs out of batteries, always there, and easy
to use;

--Sylvain