I was originally going to use an ET drive motor, but the curve only
shows it as 1.4 HP, and it is shunt wound. The snowblower motor is rated
on it's curve as 2.5HP and it is fundamentally as series motor, so I
went with it. What motor are you using Damon? And do you have
performance curves for it? I plotted (correctly I think) curves for an
Etek on top of the curves for mine and mine actually looked a bit
better, but I may be missing something. I guess I really need to get it
out on a nice big flat area and try to run it up.
When 'empty' it pushed easily. There may be a bit of disc brake rub on
the front, but I think it's minor.
I really wish I had that 1.5:1 transmission ratio I missed. I'd gladly
give up top end for a solid low end start up.
- steve
damon henry wrote:
It really is a balance between acceleration and top speed. Your
figures don't sound that much different than my motorcycle. Mine
won't even move without pulling 100 battery amps to get it started,
and I top out at about 60 mph. I can maintain 40 mph pulling about
100 battery amps. That's at 54 volts with a 14 to 41 gear ratio.
Accelretion is fine, although a bit slow for a motorcycle, more like
an econocar.
If I were you I would get some more data before deciding you need to
make a change. Just be careful not to overheat your motor. If it is
cooled by an internal fan, running it faster will also help keep it
cooler, so maybe you need to get it out and run it at a higher speed.
I am not familiar with the motor you are using. Is it the drive motor
from an electrak? If so, it seems like it would be decent choice but
I really don't know.
How easy is your motorcycle to push? Getting it to roll real well can
make a big difference.
damon
