Cees, I am just a bit curious about how your system works.
Surely you realise that "constant speed" in F3A is relative to the ground and not measured airspeed?
So aiming for 50 mph constant speed in a 20 mph wind, you want to fly 70 mph upwind and 30 mph downwind.

Magne,

I did replace this post to my own thread because it was "off topic" in another thread.
There was a question about air speed control I use in my Top Flite Taurus but also to use in the Oldest Taurus on Earth in the near future after first flight primair data logging of the performance..


Airspeed control. "öff topic"

When I fly my Taurus and switch on my "cruise controller" , stick on 50 %, within the limits of plane and power the speed is 75 km/h, 46 mph.
Which speed? Measured airspeed by the airspeed transmitter.
Stiick 0 procent , airspeed is adjustable with trim above stall speed, for example 35 or 40 km/h.
Lowest speed to fly safe is 33 km/h , 20 mph.
The engine is continu manupulated by the controller because of the measured variations of airspeed.
Of course I do use my stick, only my info is speed and not throttle.
Also my plane naver stalls as long as the engine is working in normals conditions, interesting when turning from upwind to downwind.
When I want to fly downwind with an unflyable low speed (below stall speed) the controller will prevent that because my lowest possible setpoint I do adjust with the trim.
To land I do preselect to switch off the controller to manual control on moment of touch down. So the plane will stop and not maintain speed while rolling. Because of the windgradient the rolling speed would be much much higher!
Touch and go and starting I do with cruisecontrol "auto"

Cees




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(in reply to Magne)