Posted for Sven Jerlhagen <sven.jerlhagen@gmail.com>:

 Most european washing machines have a pressure switch to sense waterdepth to
make sure there is water when heat is on. These machines only connects to cold
water. This pressure corresponds to approx 50-100 kts pitot and can be
adjusted with a screw on the sensor. Talk to your local appliance service
place. Maytag hooks up to hot water and has no heating.
 
 I use a similar circuit, but connect the NC terminals together instead of
having the IC's. I use flap>10 (no aispeed). Same function but simpler (ie
better). With my fixed prop if I forget both gear and flap it is impossible
not to overshoot the runway. With a CS it may be better to use airspeed. I use
an airspeed swith to ensure the gear can not be retracted on the ground.
 
 I can post a schematic in the week if you are interested.
 
 Sven J
 Lancair 320
 SE-XOP