Singapore 777
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Posts: 980
Joined: Sat May 29, 1999 3:00 pm

Aircraft Specification Speed...

Tue Aug 05, 2008 12:54 pm

Hey guys

I was wondering all the V (speed) listed on specification of various aircraft, are they shown in TAS (True Airspeed) or EAS (Estimated Airspeed)?
 
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Jetlagged
Posts: 2562
Joined: Sun Jan 23, 2005 3:00 pm

RE: Aircraft Specification Speed...

Tue Aug 05, 2008 1:33 pm

V speeds are in IAS (indicated airspeed). They wouldn't be much use to the pilot otherwise.  Wink

BTW, EAS is Equivalent Airspeed, not Estimated.
The glass isn't half empty, or half full, it's twice as big as it needs to be.
 
Singapore 777
Topic Author
Posts: 980
Joined: Sat May 29, 1999 3:00 pm

RE: Aircraft Specification Speed...

Tue Aug 05, 2008 2:14 pm

Opps. I am actually referring to specifications of aircraft found in places like brochures and Jane's All The World's Aircraft encyclopedia and information database like Airliners.net Aircraft Data page. Inside these places, there are many speeds listed like Max Cruising Speed, Economical Cruising Speed etc. So I was just wondering are these speed in EAS or TAS.
 
Pihero
Posts: 4232
Joined: Mon Jan 31, 2005 5:11 am

RE: Aircraft Specification Speed...

Tue Aug 05, 2008 3:04 pm

They are true airspeeds, TAS.
But they are meaningless as the conditions (temperature, ISA...altitude...) are not corelated.
Just an idea for aviation fans.
We are talking about more meaningful data as Mach numbers for high altitude velocities.
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