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Saw an article in NASA Tech Briefs (article in R/C Modeler at same time)
which described a wing leveler which used static voltage differences as
plane rolled to bring wings back to level. Kinda cute, simple and easily
applicable to ANY aircraft whether bathtub Heath or C-5A.
Robert L. Nuckolls, III wrote:
> 
> >So I guess each pilot has to evaluate their own abilities/needs.
> >I know it is easy for us to get to reliant on a lot of gadgets to where
> >we get rusty with the basics, but my vote is that an RV has more of a
> >need for an Auto pilot for IFR than a lot of other airplanes that they
> >are typically used in
> 
>    Years ago, Mooney (the hot-rod of the period) had a standard
>    offering in their airplanes called "PC" or "positive control".
>    It was nothing more than a pneumatic wing leveler (Brittian
>    as I recall) that tied the turn coordinator to the ailerons
>    via very simple, "juice can" actuators.  The whole thing ran
>    off of vacuum pump (except turn coordinator which was electric).
> 
>    This system was always on. It could be momentarily diabled by
>    punching a button on the wheel but if one chose to simply
>    override it and put the airplane back on course, there were
>    no smoking motors, squealing clutches or sweating pilots.
> 
>    I've always had a soft spot in my heart for those actuators.
>    While bulky, they were light. They had only two moving parts.
>    With modern materials, they could be built to expect extremely
>    long service life . . . probably never touched over lifetime
>    of an airplane.  If the volumes were high enough, there's no
>    reason a modern incarnation of that system should sell for
>    more than 5-600 dollars.
> 
>    IMHO the basic wing-leveler is as important as your VOR/ILS
>    system in any suite of IFR equipment.
> 
>       Bob . . .
>       AeroElectric Connection
> 
>                       ////
>                      (o o)
>       |                               |
>       | Go ahead, make my day . . . . |
>       |   Show me where I'm wrong.    |
>         <http://www.aeroelectric.com>
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