Searching for a new motor
The very limited test sailing performed sofar, has proved that the current Polulu motors works fine.
The Polulus are strong enough but as always with small modelboats they seem to fast.
I'am looking for high torque and low RPM.
The Polulus has enough torque for the given propellers,
but due to possible debris in the water you would always want more torque and if possible lower RPM.
The model is designed for 130 size motors but the length of the motors are not limited so 180 size motors will also fit.
I've ordered 3 different motors, sourced on the internet.
The motors has been 'tested' metering the 'empty load' current and the stall current.
The motos were attempted stalled with my fingers.
The test was performed using 4 new alkaline 1.5v cells.
The voltage at the motor pins was 5.5v and the short circuit current was 1500 mA.
After the test I've opted for the no name motor KK A6