by Burgerman » 16 Nov 2018, 01:17
Too many variables to hazard a guess. Maybe 10% for an average user. But it will vary a LOT depending on usage, user, weight, terrain etc. On a lateral slope like the edge of a road, for eg it might use 3x more Amps at the same 3 mph as a mid drive chair.
FWD uses a lot of power indoors as theres a lot of weight to swing around sat over the casters as you manoever about around furniture or doorways etc. So very wasteful in a indoor situation.
At slow speeds in a straight line they are as good as any chair. As speed increases the gyro if fitted wastes motor power (or you do it manually without thinking as you correct it). So the faster you go the more power you waste. And because of peukert, the battery doesn't just use more power, it actually shrinks. Because you are discharging it faster. So that cost even more range than you would expect.
So all else equal, a front drive gains range from a relaxed pace for 2 separate but related reasons.
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