[Christ]

I wonder if anyone ever considered using a CVT type transmission for this app? You can tune some of those transmissions so that they keep a specific input RPM through acceleration... so basically, you could set it up so that the e-motor is ALWAYS at whatever RPM you want it at, other than initial power up to start moving... but as soon as it gets going fast enough in the lowest "gear ratio" of the CVT setup to be at your prime speed, the CVT starts expanding the output to update the ratio dynamically based on input speed.

The easiest example of this I can think of is on a field vehicle that my dad used to have called a "PUG". Articulate steering and a 5HP motor, 2 speed axle, but a centrifugal clutch on the motor and a centripetal drive pulley on the axle input. (belt driven)

It would dynamically change ratios for a few seconds. High gear was RPM limited to 25 MPH, which is great for a 5HP briggs,, especially in a 500lb vehicle with 1000lb capacity in the back and 500lb cap up front, for a total of 2000lbs capacity... it would still go 25 MPH fully loaded down.