Air Gap

[eap9]

What would be the most ideal airgap for a box 12 motor that will be run on a modestly powered track

[glueside]

What kind of setup/magnets/arm/degree/brush springs?

[wayne h]

530 - 535 is a good starting point. it will depend on magnet strength, arm diameter, track power, wing vs scale, glue vs spray/non glue, gear ratio, brush spring tension, driving style, etc, etc. in general, you are going to have to choose between rpm and torque. build the motor and test it. if you have more brakes than you like, hone it out (if legal). if you don't have enough brakes, buy a new set of magnets and try again.

wayne h.

[eap9]

I will be using a pro-slot can, Fastones gold dot match magnets, Pro-slot 38 degree .513 armature, Gold dust brush, Champion lights and 9/38 or 9/39 gearing.

I like a more torquey motor with medium brakes. We race on an Ogilvie 155 hillclimb with spray glue.

[glueside]

I would start at .528 and then work your way out. The smaller air gap will give you good brakes, and alot of torque. With a 38 degree arm you may even get lucky enough to be able to run a 10 tooth pinion, but it really depends on the power itself.

Good luck.

[eap9]

Hi Jeff.


Our track is powered by one 13.8 V power supply attached to two 8D truck batteries. I guess this set-up would make it a modest powered track? Would a higher gear ratio like a 10/39 or 10/40 work on a modest powered track or should I just go to a 9/37?

[glueside]

I think I would first try a 10/37 take about 10 laps and check the motor temperature. If the motor is really hot already - I would go to a 9/37 and work from their to get the car dialed in to your driving ability.