Sporty's E6B density altitude disparity

Dallas wrote:
On Sun, 29 Apr 2007 17:59:35 GMT, Tom L. wrote:

I entered the same numbers in my Sporty's E6B and got
PA: 998
DA: 1910

You entered the *same* numbers into your Sporty's E6B and got different
numbers than my Sporty's E6B?

What's going on here?


It is called tolerance. An E6B is a mechanical device. The
registration of the embossing on the various rings can be a little off.
The rivet may not be exactly centered on all of the disks, etc. It
doesn't take much to be off by a fair bit given the meager resolution of
the scales on the E6B. When I took my commercial written last year, I
could never get exactly the numbers in the study guide for the
computation problems, but I was close enough to know which answer was
correct.

Matt