I don't want to Hi-Jack this thread...Because there is some good stuff going on I'd like to ask some question?
I've been looking at using some of the new motors that are out there Like Out Runners and such...But I've run into a bit of snag.
All the "Universal Couplings" I've been looking at post a warning.
"NOT FOR USE WITH A BRUSHLESS MOTOR?" Is this due to RPM constraints?
Jeff
Due to the almost universally accepted
myth that all brush less motors are high speed overpowered beasts of things
I have a brushed motor, 540 sized, with a kv of 8300, the coupling would destroy itself if the motor was run at 2 volts
If you were setting up a FE boat then you would not use a universal coupling, brush-less or brushed
Regardless of the motor if the RPM is below 10 000 and the prop was below say 45-50 mm then a universal should hold up OK.
The Brushed and brush-less motors I suggested will not damage a universal
It doesn't look like a speed boat or a racing boat to me........I would be most surprised if your vessel would need 6000 RPM
6000 RPM unloaded motor RPM with a 40 mm prop, works well in a few of my boats springer etc. correspondingly lower for a larger prop, faster for a smaller prop
As you said judicious use of the throttle for normal cruising
Have you seen my article on Brushless for scale boats ?
Pic below is my brushless springer internals, 1000 Kv motor on 6 volts, 40 mm prop, Universal, and the mind boggling peak speed of 3.2 Kph measured with a GPS
Cheers
Nick
