Gents,

Research and development is interesting for me and in the Netherlands we do not fly “classic pattern contests”, so why not? Nothing to argue about only searching for data and facts.
It also has to do with my Simla Construction and Flying schedule with already al lot of remarkable facts. (CP!)

R & D.

For the MODIS I do need an instrument to measure for me the flight level during the test flights of the Simla, why?
An important test for example will be the moment of stall and AOA of the Simla on that moment. Seeing the flight level on the graph will make it an easy job (I hope!).
It all has to do with tail cone angle, landing gear dimensions, attitude of the plane on the ground and incidences of wings and stabilizer.
Interesting for me for measuring quantities is using the old instrumentation methods again for the “Old Simla” and not “modern pressure transducer stuff”. My disadvantage? 48 grams of added weight. My radio system is much lighter than the systems of the past so I don’t think that’s a problem.

On the picture :
1 Anaroid chamber (Blaise Pascal , 1623 – 1662) of an old barometer
2 Balance weight of measuring system to eliminate G-forces.
3 capacitors to locate the position of the chamber
4 electronic circuit to convert capacitor position to output voltage.

Picture 2 An anaroid flight level registration system (recorder) as was used in the past (1922) but also still by myself in gliders (1976) for registration of flight level.

I already did use my instrument in an experimental FPV plane and still can show you a video made of the (All Persons View) monitor during one of the test flights see: http://www.rcuvideos.com/video/TeletubeTest-wmv
During this flight the real time flight level was shown on the monitor on the ground (in steps left side) by LEDS in front of the video camera in the plane. Also climbing and rate of sink (vario) was visible (on the right side) this way. For the vario signal the differential of the output signal of the instrument was used combined with some comparators and LEDS.

Before using the system in the Simla I will make a unit/container to mount on the bottom of the Taurus. I already did make some plans and preparations for that, mounting nuts etc. Planning to measure AOA, Speed, flight level, vario, engine RPM, etc of the Taurus first to test the system.

More to come
Cees