Quote:
Originally Posted by johnrobholmes
Glad to see how well this turned out with the proper rollout. I picked up a 4ft section of L channel today. Time for more "research" into this. Got any taller tires you could throw on your rig to test a higher rollout ratio?
Maybe I missed it, but what ESC did you use in the vid? Sounded like a quark to me.
|
Did you find it at Lowes?
I would really like for you and the other guys that plan on doing a Direct Drive to Diff conversion to share our findings with each other. I think if we compare notes along the way, we can all learn from it.
In remembering our conversations about Wye and Delta windings, I think you will have a vantage point in building your conversion. I suspect the Wye Termination wound with fewer turns to match the Delta kv rating would work better with this. MUCH more torque.
I tried the Phaltline tires that are 5.5" tall, then I put the E maxx tires on that are 5.75" tall(same as the Revo). They both work well. I don't think I would want to go any higher geared than this.
Even an outrunner needs to spin up a certain degree to make it's power.
With the 5.75" tall tires, roll out is 4.2" per revolution of the motor. Think about that. That's alot.
I think this helps to confirm the statement that "An outrunner motor makes 5 to 7 times the amount of torque as an inrunner does".
Increasing the ratio would just bring back cogging on startup. This cogging could completely be eliminated by the creation of a custom sensor based outrunner setup OR possibly be improved with some internal mods to the ESC. The resistors in the feedback leads could be changed to ones of less resistence.
Most ESC's on the market are designed to work well with a wide variety of motors, inrunners and outrunners alike. I really think startup routines AND Anticipated spool up speed of a motor are based on a curve that is a rough average of how most motors perform. I don't think this "curve" fits every application ideally.
I'm using the 80amp Quark ESC on this right now.