PPRuNe Forums - View Single Post - Which speed should be used in calculating the mach number?
Thread: Which speed should be used in calculating the mach number?
View Single Post
Old 18th Jun 2013, 13:46
  #1 (permalink)  
hin0727
 
Join Date: Jun 2013
Location: hongkong
Age: 33
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
Which speed should be used in calculating the mach number?
Hi ,
there is a question that is bothering me about the mach number calculation...
I have seen in the "pilots handbook of aeronautical knowledge" that mach number is using CAS in calculation.
However in "ace the pilot interview", they use TAS in the calculation above FL260 and IAS below FL 260.
Can someone tell me which airspeed should be used in the calculation?
And also why we should use two different airspeed at above or below FL260??<in the case in Ace the pilot interview>
Thanks a lot!!
hin0727 is offline  
Reply