"Mr.Smartypants" wrote in message
...
On May 21, 4:55 am, "Danny Deger" wrote:
Look at the link for a picture of my manual aviation computer. It has two
different places to put in pressure altitude and temp to get density
altitude and convert airspeeds. Can anyone explain the correct use of
these
two similar functions?

http://flickr.com/photos/26467772@N05/2508589733/


There is an instruction manual that comes with those things. Have you
ever tried to read it?

The one on the top/left is to correct indicated altitude to true altitude --
a function I have no use for. The one on the right is the one for density
altitude/airspeed correction -- a very useful function.

And mine didn't have a users manual. It was issued to me by the Air Force
and I was given training on how to use it. I didn't keep all of my training
material.

Danny Deger
Read my story, "Houston You Have a Problem" at
www.dannydeger.blogspot.com