Drag reduction with altitude?

[Vigilant1]

If a questioner just wants a simple factual answer, it can be a short one.

If a questioner wants to know the "why" behind the factual answer, then the answer will be longer, require more detail, and require more thought from writer and reader. And, a LOT more true understanding is likely to result if successful communication occurs.

 

[Voidhawk9]

I went to the POH.

That's fine, if all you want to know are the numbers for that exact aircraft under those exact circumstances.

 

[Pilot-34]

Are you telling me that the approximate trend I saw there won’t hold true with other aircraft that are approximately the same ?

 

[Voidhawk9]

May in some cases, not in others. That's what everyone is trying to tell you - you cannot over-simply then extrapolate and expect accurate results.