Terrence,

You might look at the PP Avionics fuel controller.  It automatically shuts off the pump and indicates when a tank is pumped dry by sensing the change in the current draw (I don't remember for sure).  Very slick unit and used by several Lancair owners, including myself.  I happen to use a Grand Rapids Technologies header tank fuel probe with hi/lo outputs to drive the sensing versus the standard optical probes.

 

 

Regards,

Clark Baker

 

On 4/18/06, terrence o'neill <troneill@charter.net> wrote:

To those who've been there-done that on early Lancairs -- request your comments. I want a minimum-management on-off fuel supply.

For my L235 w/ IO320, I'm now running the fuel line from each wing tank through a  filter on each Facet pump, then from each pump -- both into an open Tee, up to the header tank --

Control of the Facet wingtank pumps' is on-off with an optical level-sensor in the header,  

to break or complete the plus-circuit 12VDC to each/both tanks' power-on/off switches. 

Left and right tank Facet pumps individual switches are normally left on, and powered when a/c master is on.   A red 'pumping' light is in the wing tank pumps' power circuit, cycles on and off as sensor demands fuel for the header.   When light stays on, attention is called to the

How can power to the L and R wing tank Facet pumps automatically switch off when the wing tanks are dry?