Compass updates
04-02-2015 | 11:29 PM
#6531
Gets Weekends Off
Joined: Dec 2013
Posts: 2,579
Likes: 77
No, not all 3 in my opinion. Think back to the definitions and reasons for either increasing or decreasing values of all 3 of those terms indiviually.
TAS increases with altitude, IAS decreases, AOA will likely need to increase due to the decrease in IAS.
Maybe the wording of the question is why people keep giving up different answers. I could see how one could read that, and assume the question is referring to the entire climb, level off, cruise process.
I see it as just "In a constant mach climb, what will you observe about TAS, IAS, and AOA as you climb to high altitude?"
TAS increases with altitude, IAS decreases, AOA will likely need to increase due to the decrease in IAS.
Maybe the wording of the question is why people keep giving up different answers. I could see how one could read that, and assume the question is referring to the entire climb, level off, cruise process.
I see it as just "In a constant mach climb, what will you observe about TAS, IAS, and AOA as you climb to high altitude?"
http://www.airlinepilotforums.com/te...-airspeed.html
TAS and IAS decrease while AoA increases.
04-03-2015 | 12:37 AM
#6532
Gets Weekends Off
Joined: Aug 2014
Posts: 191
Likes: 0
I think CubDriver's answer is correct here:
http://www.airlinepilotforums.com/te...-airspeed.html
TAS and IAS decrease while AoA increases.
http://www.airlinepilotforums.com/te...-airspeed.html
TAS and IAS decrease while AoA increases.
04-03-2015 | 02:54 AM
#6534
Line Holder
Joined: Dec 2012
Posts: 594
Likes: 141
From: B767
TAS increases with altitude. That's part of the reason we fly so high. Watch the TAS as you climb at .75- it increases
04-03-2015 | 03:24 AM
#6535
Gets Weekends Off
Joined: Nov 2011
Posts: 4,564
Likes: 24
Tas increases and ias decreases with an increase in altitude
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04-03-2015 | 04:41 AM
#6536
Gets Weekends Off
Joined: Aug 2007
Posts: 2,049
Likes: 0
From: I pilot
TAS increases if you climb at a constant CAS. If you climb at a constant Mach, your TAS will decrease.
Normalabnormal is right.
Normalabnormal is right.
04-03-2015 | 06:49 AM
#6538
Gets Weekends Off
Joined: Feb 2007
Posts: 3,045
Likes: 1
From: FO
Does anyone know the answer to this question, it's in the gouge - and everyone in the gouges is putting a different correct answer, thanks.
"If you hold a constant Mach during climb-out, what happens to TAS, IAS, and AOA as you approach your level-off altitude?"
All 3 decrease?
"If you hold a constant Mach during climb-out, what happens to TAS, IAS, and AOA as you approach your level-off altitude?"
All 3 decrease?
04-03-2015 | 07:49 AM
#6540
Gets Weekends Off
Joined: Dec 2011
Posts: 146
Likes: 0
Here's what I saw this morning...
FL225: Mach .70, TAS 431, SAT -22C
FL275: Mach .68, TAS 412, SAT -33C
FL310: Mach .79, TAS 470, SAT -42C
FL350: Mach .79, TAS 462, SAT -49C
FL370: Mach .79, TAS 451, SAT -54C
The speed of sound measured by the Mach meter went from 616kts at FL225 to 571kts at FL370.
In a climb at constant Mach, decreasing TAS, decreasing SAT (until the stratosphere).
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