Dtrainmaster posted:OK, but you have to count how many revolutions of the armature it takes for one full revolution of the wheel.
Dave
Using a little math to approximate the new gear ratio.
Given a wheel diameter of 0.83333 inch for a Lionel diesel (scale 40 inches), this gives a wheel circumference (pi*d) of 2.617 inches. Dividing by 0.25 inch per single revolution of the armature (from above) gives a gear ratio of 10.47, so it takes 10.5 revolutions of the armature to turn the wheels once where as stock is roughly 8 revolutions of the armature to turn the wheels once.
The horizontal motors are ~9.5:1, a significant reduction from even that of 2343. I would imagine that the new gears would 1.) greatly reduce the speeds of the locomotive, 2.) result in cooler operation of the motor, and 3.) increase tractive effort.
The gear replacement sounds interesting to me.
