pic: 20's IRI Carnage

[KrazyCarl92]

Originally Posted by AdamHeard

I'm not understanding this point, how did it see more torque than it usually would?

In high gear, a full speed direction change will result in 2x stall torque being applied.

That is in high gear. So 2 x 2 x 45 x 45 / 11 / 30 = 24.5 times stall torque. Also remember voltage drop and it's far more like 16 times CIM stall torque at the dog.

We were in low gear when the wheel broke and stayed there for a while.
2 x 2 x 45 x 60 / 11 / 15 = 65.5 times stall torque of a CIM seen at the dog. More like 44 times CIM stall torque when you account for voltage drop. Normally the wheels would have slipped long before that point was reached, but one was broken, so the torque was unable to turn the wheels. Don't know to what extent this is true but there was certainly more than the normal traction limited amount of torque being demanded of the dog.