Interesting question.
I had to do that once. The trail had been groomed with deep fresh sand and I found myself walking my recumbent up the fairly steep grassy hill alongside the trail. You can do it, but...
First I have to add the caveat that this was
not done with a GM controller. I'm presuming that the specs, such as throttle position analog to digital resolution, are the same as the controller I'm running. The reason this matters is because the higher input resolution gives smoother (finer actually) control. As far as I know, and I've never put a meter to one except to confirm a live input signal, all Hall Effect throttle position sensors return about the same voltage range.
The next variable is the throttle rotation angle. The shorter the throw, the steeper the input signal rise angle. This matters when your hand twitches on the throttle (a small bump) and the bike wants to launch itself from your grip. Mine almost got away on me twice. I asked for the long throw twist-grip when I ordered, but I haven't measured the angle.
Some controllers have a 3 speed range option available. Worth the added expense in my book (like $20 plus the three position switch). It has just occurred to me to set my lowest range to walking speed for just such occasions. Be aware though, if you intend to go for long walks with your electric bike (and how romantic is that?), that motor efficiency sux in the very low rpm range.
So, the motor is capable of being led along like a sheep. Or a wolf with a hair trigger and the strength of 10 grown men (Let's presume 150W per man. Okay, 9.6 men then).
Success might all depend on your coffee intake quota that day.
Jeff
