Mach V formula
Thread Starter
Join Date: Oct 2003
Location: The Heart of Darkness
Posts: 186
Likes: 0
Received 0 Likes
on
0 Posts
Mach V formula
OK...I'm listing this here because you guys are more likely to have the info at your fingertips...or have sat the exams recently enough to remember the formula...
When I did my exams 20 years ago ( UK ) we had to know the formula to calculate Mach speed... my brain has suffered over the years ( Beer ) and although I thought that I still remembered it apparantly I've got it wrong....
My obviously mistaken formula was: TAS/LSS.... LSS calculated by: 38.94 x square root of K ( K I thought was -472 or something close....
Anyone out there that can help ?
When I did my exams 20 years ago ( UK ) we had to know the formula to calculate Mach speed... my brain has suffered over the years ( Beer ) and although I thought that I still remembered it apparantly I've got it wrong....
My obviously mistaken formula was: TAS/LSS.... LSS calculated by: 38.94 x square root of K ( K I thought was -472 or something close....
Anyone out there that can help ?
Join Date: Jun 2003
Location: UK
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
Mach No = V/a
Where:
V is speed in m/s and a is the speed of sound.
a = SQRT(Gamma x R x T)
where:
Gamma = ratio of specific heats (normally 1.4 for dry air)
R = Gas constant (normally 287.0519)
T = temperature (in kelvin)
hope this helps
stu
Where:
V is speed in m/s and a is the speed of sound.
a = SQRT(Gamma x R x T)
where:
Gamma = ratio of specific heats (normally 1.4 for dry air)
R = Gas constant (normally 287.0519)
T = temperature (in kelvin)
hope this helps
stu
Join Date: Oct 2004
Location: UK
Posts: 762
Likes: 0
Received 0 Likes
on
0 Posts
What do you do with the formula
Bafanguy
Talk about it to people in bars etc. that you want to get rid off. And relate it to a mach no. of your car on the local A road"
Works every time.
Along with " It's really difficult to find work after getting out of prison".
Hope this helps.
JTK
Talk about it to people in bars etc. that you want to get rid off. And relate it to a mach no. of your car on the local A road"
Works every time.
Along with " It's really difficult to find work after getting out of prison".
Hope this helps.
JTK
