Not much to look at (cheap action cam doesn't do low light worth poop), but I went for a "proper" test drive this morning:
2nd gear the whole time. Peaked a bit over 50 km/hr near the start, then slowed down closer to the 40k speed limit. Climbing the hill 2/3rds through, it didn't slow down below 40, even though the controller was kicking in the low-voltage protection.
Route, according to google maps, was 6.0kms. AH meter said I used 11.7ah. (though I forgot to check that it was zero'd out before starting...charging will confirm it one way or the other). at ~72v, that's about 140wh/km from the batteries. That's pretty decent, if it's true.
Fun little drive. Would have been better with brakes. Yes, I can stop the car, but I need plenty of space. Time to add vacuum pump to the list of to-do's. Anyway, motor was luke warm after the drive. As in room temp kind of warm. Nothing appreciable on the temp of the controller or batteries. I'll have to take some actual temp readings next time.
But ahead of that is to start in on the second half of the battery pack...I want to see how it does with less voltage drop at 72v from having them in parallel before confirming the switch over to 144v. Oh and field voltage control...she was pretty gutless on takeoff in 2nd, in spite of the motor ammeter being pegged. (I've got that one half done, just need to put it all together.)
And, if I'm still not satisfied with the performance, well, I have that FB1 motor and the 1000a controller sitting around...that should get it moving in a hurry!
