I'm forwarding this post from the Lancair list for the benefit of those with retractable landing gear.  Seems like a neat solution to a problem.

Mark S.

> Ian Crowe wrote:
>
>
> Due to my gear up landing I want to fit a pressure switch in the pitot line.
> I need to know how to convert airspeed into pressure units in order to buy the
> correct switch.  Electronics catalogs have adjustable pressure switches at
> under $20.

I have used the Ellison switch with no problems for a couple of years.  It is
easy to adjust using the airspeed indicator.

http://www.ellison-fluid-systems.com/accessories/accessories.htm

Bob Belshe
L235/320

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