Gents, for who is interested.

The Robbe Bordkomputer (Germany) of my Top Flite Taurus does have two analog input channels and one digital engine rpm channel. I can take about 9 samples during a flight. Enough for data logging during flights to select propellers and measure airspeed values or engine temperature.

MODIS

Robbe, Modell Datenerfassungs und Informations System (MODIS).

By coincidence I did discover a Robbe Modis (germany) continuous data log system and I was able to buy it.
With the system it is possible to sample continue 4 analog and one digital RPM signal during a flight. Total period depends on the count of samples per second but that seems to be enough. I probably can use my own designed sensors (airspeed, fuel level, engine temp).

In the picture, the data logger and the airspeed sensor that was delivered with the system just as a RPM sensor (not in the picture).

Have to bring the system alive again, after that, try-out in the near future in the Top Flite Taurus so maybe soon in this theatre.
If it is working again satisfactorily, it will be used next year in the Oldest Taurus on Earth and the Simla.
After a program of test flights I probably know more about performances of these two Classic Hot Pattern Ships.

Cees