Difference between a subsonic Pitot tube and supersonic one

[stephane]

Hi,

Please could you explain the difference between a subsonic Pitot tube and supersonic one

Thanks

 

[rcgldr]

Looks like significant part of this is the math involved. Wiki article:

http://en.wikipedia.org/wiki/Machmeter

 

[stephane]

Looks like significant part of this is the math involved. Wiki article:

http://en.wikipedia.org/wiki/Machmeter

Thanks for your response but I ask about thé shock ahead pitot in supersonic an since thé flow is non isentropic so thé stagnation pressure is différente so thé value measured by pitot is false in supersonic régime no...?..

 

[rcgldr]

I'm not sure if the pitot tube is significantly different, or if a machmeter just compensates for supersonic issues with math.