Gents,

For who is interested, search for stall speed:
Did some measurements on the Top Flite Taurus with the data logger to know some real airspeed values after overhauling
.
Weight about 4 kg, so heavier than standard. Engine MVVS 10 CC.
Fuel 5 % Nitro, 10 % oil. Propeller Graupner Sonic 13 x 7.

Measured airspeed values.

Top speed horizontal flight, two measured values, 133 and 137 km/h
Controlled pattern speed, two valiues. 79 and 85 km/h.
Lowest speed to fly “safe” horizontal 47 km/h and lowest speed to fly without maintain altitude 33 km/h.

During the flights for safety reasons I do have located the position of the CG 8 mm direction "nose heavy" of the official location. Result is, the Taurus doesn’t stall.

Next activity is replace the CG backwards near the official position. Replace the battery (s). Search for real stall speed.

All values measured with the Robbe (Data) bordcomputer 8323 and a calibrated airspeed transmitter. Accuracy +/- 3 % of measured values.
Edit: position of the logger (German Bordcomputer) to show in post 763.

Cees