PPRuNe Forums - View Single Post - climbing at a constant IAS
View Single Post
Old 24th March 2006 | 08:57
  #1 (permalink)  
bultaco
 
Joined: Dec 2005
Posts: 50
Likes: 0
From: Stanstead
climbing at a constant IAS

Hi all,

Maybe someone can help with this question.

You are climbing from MSL at a constant IAS of 200kts to 40,000'. I think your power requirement is increasing and power available is decreasing. The angle of climb and rate of climb is decreasing. I heard that at 40,000' the density is 1/4 the MSL value and your TAS is twice MSL i.e. 400kts for this question. Now the lift equation should stay in balance cause the density is 1/4 but the TAS is double. So:

1)Does the AOA remain the same throughout the climb
2)Do you need to reduce the pitch of the aircraft

Bultaco
bultaco is offline