Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length.

[Staffs John]

Hi All

I'm looking for a good motor for my MMM Brackengarth I would like to run on 24v I have found a motor i was wondering what you all thought.

The spec is
 
24v
   No Load
   speed 8400 rpm
   current 0.56 A

   Maximum Efficiency
   speed 6800 rpm
   current 3.5 A
   torque 80.0 Nm
   output 55.8 W

   Stall
   torque 440.0 Nm
   current 17.0 A

   Max Power
   95.0 W

   Typical Torque
   12.0 Nm

So what you think i have mixed reports on certain motors not giving the best performance.
Regards john.
             

[john s 2]

Sounds promising. Water cooling may be required. Is this the mmm Motor witch can take 24v? John.

[Shipmate60]

8400 rpm on a large single Kort of 90 or 110 mm is rather excessive.
You need torque not rpm on props that size.
I doubt if you would need half that revs for decent performance and power.

Bob

[malcolmfrary]

8400 rpm on a large single Kort of 90 or 110 mm is rather excessive.
You need torque not rpm on props that size.
I doubt if you would need half that revs for decent performance and power.

Bob

Loaded by a large prop, I doubt that anything like the no-load rpm would be achieved.  To run at the "max efficiency " speed of 6800 rpm, gearing would probably be worthwhile rather than water cooling.