SPIT MK I/II and over boost

[Crumpp]

But there is no direct relation between IAS and climb rate.

See above post......

theory says is is decreasing

There is no theory to it. We are not talking quantum physics. Get a pilots license or go to school to learn about airplanes. Stop getting your information from these gamer discussions about virtual planes from folks who have never even smelled avgas.

It is a very simple concept that does not require an indepth discussion.

Climb speeds change with altitude.