We went down to King Malu to try to get the throttle working. No it wasn't necessary, but I will sleep more peacefully knowing that the new motor is controllable!
It's amazing what you can make out of an expired MEA Elite Club membership card, a couple of gear wheels from a remote control model car, some 5mm threaded rod and a small piece of wood.
The first attempt was a failure. The voltages we were getting were strange and unpredictable. That was till I realised they had sold us a logarithmic rather than linear potentiometer.
Replacing it with the linear pot we got the following voltages:
Forward max throttle is 4.38 volts
'Neutral' centre throttle is 2.7 volts
Reverse max throttle is 0.8 volts
The central 'neutral' position is slightly variable between 2.7 and 2.85 due to mechanical movement in the morse lever. There is a little play in the rig we attached to the morse control but most actually comes from the chain linkage down from the morse lever.
We will rebuild the mounting for the two gear wheels and potentiometer for the final version.
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