Mach Meter

[LXApilot]

Just a question to get some people thinking, or maybe its just me being a complete idiot... Had one of our senior captains ask me this question today, and I had to bull$hit a response.

If the airspeed indicator is inherently incorrect, especially at high altitude, then why is the mach meter always correct?

My guess answer? Probably compensates for the error through a calculation of temperature, altitude, and indicated airspeed. Any takers?

 

[Typhoon1244]

Uh...coriolis force. The vertical component of adverse yaw. El Nino.

Actually, this reminds me of one of my favorite CRJ questions...

Q: What does the Mach transducer do?

A: It transduces Mach.

 

[fulcrum]

sealed capsule design

The mach meter -----------measures Airspeed relative to the speed of sound basically it is made up of a ASI and an altimeter

It also has a sealed capsule containing ISA conditions
and A pitot pressure sensor inside an (Free Air ) static pressure sensor



no temperature sensors are present in a machmeter
because it uses the formula

Mach Number = dynamic pressure
-----------------------
Static pressure


hope this helps write back if you need a detailed explaination
Fulcrum