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Hi Renee, Congrats on your find they always peak my interest. Yes the
precision on some of those is typically off but close enough for
aviation. I have a couple and they are ok but my small Jeppesen CR-5
is about equal to your precision but I would not sweat it. As to the
wind side there should be 4 screws that may possibly alleviate some of
the imprecision. Keep us posted and have fun!
Mike Burkes
626-833-1521
They still do not cease to amaze me!

On Aug 1, 6:09�am, Renee Mattie  wrote:
> 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 athttp://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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