Tas Vs Lss ??
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Tas Vs Lss ??
Hi, just have a few questions that im discussing with a few guy's.
Were talking about TAS vs LSS (local speed of sound)
We do know that LSS is dependent on Temperature so with a decrease in temp we get a decrease in LSS. BUT!!!
How do they work agains each other TAS and LSS.
If one increases what happens to the other and vise verse!!!
Were talking about TAS vs LSS (local speed of sound)
We do know that LSS is dependent on Temperature so with a decrease in temp we get a decrease in LSS. BUT!!!
How do they work agains each other TAS and LSS.
If one increases what happens to the other and vise verse!!!
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Ya thats what i was saying aswell that TAS does not have any direct relationship to LSS, but were discussing a question that was given at a Airline interview where it was asked: What happens to LSS or TAS if one increases or the other decreases?
Didnt make much sense to me as i do not believe that they are directly related.
Anyways
Thanks
;-)
Didnt make much sense to me as i do not believe that they are directly related.
Anyways
Thanks
;-)
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LSS or Mach?
If it is the relationship to the Mach number you're looking for, then there is a simple way to remember, here we go:
Chicken Tikka Massala
C for Calibrated (most aircraft today display CAS as IAS)
T for True airspeed (TAS)
M for Mach
At sea level, in ISA, all 3 should nearly be in the same spot, as well as Ground Speed if there is no wind.
As you gain altitude, C is less than T, and T is less than M.
3 possible scenarios (scenarii for the purists):
Constant CAS = TAS & Mach will increase with altitude
Constant TAS = CAS decreases and Mach increases with altitude
Constant Mach = CAS & TAS decrease with altitude
But I am probably off-topic, unless your question was about the Mach, and not the LSS.
Flex
Chicken Tikka Massala
C for Calibrated (most aircraft today display CAS as IAS)
T for True airspeed (TAS)
M for Mach
At sea level, in ISA, all 3 should nearly be in the same spot, as well as Ground Speed if there is no wind.
As you gain altitude, C is less than T, and T is less than M.
3 possible scenarios (scenarii for the purists):
Constant CAS = TAS & Mach will increase with altitude
Constant TAS = CAS decreases and Mach increases with altitude
Constant Mach = CAS & TAS decrease with altitude
But I am probably off-topic, unless your question was about the Mach, and not the LSS.
Flex