BT

> It depends on the situation, but for your specific example, of a 4 to
> 6 kft climb, I would increase power to max, then pitch (and trim) for
> about 90 kts. If I had the mixture leaned, I would go to full rich
> first (above 75% power, full rich is required for proper engine
> cooling). 90 kts is faster than Vy for my Cherokee (about 72-74 kts),
> but is recommended for cruise climb since it results in a lower nose
> and better forward visibility, and also better engine cooling.
>

For Mr Fly Cherokee.

A full rich climb at those altitudes can result in lower performance. If
your POH engine manual dictates full rich above 75% power.. then I cannot
recommend against following that procedure.

However, At 5Kft MSL, on a hot day at full throttle are you really getting
75% power? The Density Altitude.. ohh.. that bugger we live with in the
west.. could be well above 8Kft MSL. 5K Pressure Altitude, 30C, = 7779
Density Altitude

If you find that climbing through 5Kft MSL your RPMs are dropping off, then
lean to max RPM for max performance of the engine and then bump it rich just
a tad.

BT