[Milsurplus] I-81-A Radio Compass Indicator

[J. Forster]

I have most of a complex gear & servo box (with no ID) that is late 50s,
early 60s vintage with a 3-D cam, maybe 3" long with an OD of 1-3". Part
of the stuff rotates and positions a "follower" onto the cam's surface.
There is a rack on the pointer that turns a synchro into another servo
loop.

Kewl stuff.

-John

==================


> de WB2CPN
> The guns on the belly and top of the B-17, and
> maybe other airplanes, had a rather complex
> non-electrical cam system for compensating
> the aim for when the gun was aiming at targets
> which were on either side, or below and above
> the B-17.  Maybe the other guns, too.
> Something like the three-dimentional cam that
> was in the Norden bomb sight but it had servo
> sensors.
> That's what I've been told.
> 73  Clete
>
>
>
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