Lonnie Borntreger wrote: > So add 150lbs of something to the battery pack (line it with > lead or something). That way you get the extended range of > the advanced batteries, but don't mess with the center of > gravity of the Sparrow. Of course the extra weight will > reduce range a little, but not as much as sticking with the > older battery chemistry - I would guess.
It's not a bad idea, but I'm not sure how far you could go with it. The density of a battery is pretty close to the density of lead. The amount of ballast you could add depends on how much space is left for it. If John ends up with Li-Ion, he might be able to put a pack together that leaves substantial space for ballast. He might actually be able to improve the handling of his Sparrow by moving his cg lower and more forward. I think it's an important consideration. Conservative driving is good, but you can be forced into a situation where you have to maneuver hard or crash. Another thought came to mind about this. Do I remember Sheer saying the Evercels aren't very good for high current draws? How about Li-Ion? Doesn't the Sparrow's single speed series motor draw big amps? Chris
