Range Report Need a quote from Litz's book on speed of sound...

[MrButterpants]

Looking for a quote that deals with the speed of sound variance as a function of temperature, but I can't seem to find it. Yes I own the text (and have read it) and yes I've contacted Bryan directly via PM....both were unsuccessful.....but I do remember reading the line in there somewhere...

Any help? Just a page reference would be great.....don't need the text.

 

[Lindy]

Re: Need a quote from Litz's book on speed of sound...

If what you need is the information rather than a quote from Litz, try this:

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

I'm at my sister's and my book is at home.

 

[MrButterpants]

Re: Need a quote from Litz's book on speed of sound...

Thanks Lindy, yep I already consulted wikipedia and have the info, but I really wanted a tangible quote from a text to use side by side with wikiwisdom. I'm sure someone knows what page I need....

 

[maladat]

Re: Need a quote from Litz's book on speed of sound...

Not seeing it in Litz' book, but the information in the "speed in ideal gases and in air" section on Wikipedia agrees completely with what is in my graduate aerodynamics textbook.

 

[wadebrown]

Re: Need a quote from Litz's book on speed of sound...

My original post was a source for good references on the densoty of air not speed of sound.

Here are some sources for speed of sound
http://www.engineeringtoolbox.com/speed-sound-d_82.html

and from the rocket scientists at NASA we have:
http://www.grc.nasa.gov/WWW/K-12/airplane/snddrv.html

Hope this helps,

wade

 

[Fred_C_Dobbs]

Re: Need a quote from Litz's book on speed of sound...

Would you take NASA's word for it?

http://www.grc.nasa.gov/WWW/K-12/airplane/sound.html

 

[BryanLitz]

Re: Need a quote from Litz's book on speed of sound...

I'll have to add that equation to the second edition.

For easy reference, here's the ICAO definition for speed of sound (neglecting the small affect of humidity)

sos = 49.0223 * sqrt(Tf + 459.67)

Where:
sos is speed of sound in fps
Tf is temperature in degrees Fahrenheit

In standard conditions, the ICAO sos is:

49.0223 * sqrt(59 + 459.67) = 1116.5 fps

At other temperatures:
0 degrees F: 1051 fps
20 degrees F: 1074 fps
40 degrees F: 1096 fps
60 degrees F: 1118 fps
80 degrees F: 1139 fps
100 degrees F: 1160 fps

-Bryan

 

[MrButterpants]

Re: Need a quote from Litz's book on speed of sound...

Thanks for the info fellas. Good to see you back Bryan.