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I saw an old Weems and Plath Dalton E6B at Bacon's and snapped it up.
Imagine my surprise to see that they are still making these things,
and offering them for sale at http://www.mypilotstore.com/MyPilotStore/secp/22.
I could have gotten one new ($12.95) for less than I paid at Bacon's
($15.00), and the last page of the manual wouldn't have been a jigsaw
puzzle of yellowed and crumbling paper.  Ah, well, the heavy leather
case is still in fairly good shape.

Here's the thing that surprised me about my new old E-6B.  The moving
parts are off-center.
On the slide-rule side, the grommet seems to be off-center.  So if I
set the dial for 60 miles/hour, I'll apparantly go almost 18.1 miles
in 18 minutes, though almost exactly 9 miles in 9 minutes.  So the
slide rule is good to probably about half a percent, which is not
quite as good as my cheap plastic high-school slide rule (which went
missing 20 years ago).

On the vector plotting side, there is a little slop in the inner ring,
but the center point seems to generally be a quarter degree West of
the center line at 200mph, or a full degree West at 60.

Have I got a good one or a bad one?

Thanks

Renee

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