PPRuNe Forums - View Single Post - Mallard Down in Perth
View Single Post
Old 4th Feb 2017, 08:03
  #264 (permalink)  
Virtually There
 
Join Date: May 2007
Location: Australia
Posts: 190
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by FlexibleResponse
Inertial mass is earth/time dependent for frame of reference.
It's true that inertial mass can be framed in terms of the earth's rotational axis - I concede your point. However, both the aircraft and its supporting air mass are subject to the same forces (coriolis, centrifugal, gravitational), and are therefore in the same inertial frame of reference to the earth. To all intents, the supporting air mass is the frame of reference for the aircraft.

That aside, if I read correctly, what you are saying is that, as soon as an aircraft changes direction, there is a change in inertial frames of reference between the aircraft and its supporting air mass. If so, then that inertial change must be measurable in relation to the air mass, and therefore show up as a change in airspeed.

I do not doubt there is such a change.

But in terms of the measurable difference between the two frames of reference of the aircraft and air mass, is it enough to stall a wing?

We are talking about an aircraft flying at circuit speed at 1000', and not the Space Shuttle, after all.
Virtually There is offline