Yeah, the crankarm issue on tandems carries its own set of complications when it comes to mid-drives. But I was actually more curious about how you mounted the motor to the frame: the downtube on the standard upright bikes these mounting kits are made for is pretty much absent on a delta trike, and there are also no chain stays behind the bottom bracket shell to fasten to. Those are both mount points--in addition to the bottom bracket itself--the mid-drive kits I've looked at have relied on. So how'd you mount the motor, i.e., how does it attached to the bottom bracket and frame tube(s)? Any further pics/documentation you can point me to?
Test cell V's in Ping LiFePO battery w/out dissecting it?
- Thread starter wayover13
- Start date
Rassy
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Actually, no. For the BBS02 the only mounting point is at the bottom bracket itself. The only thing the down tube does is act like a torque arm to keep the motor unit from spinning clockwise (looking from the right side) when the motor runs. There is a locking nut and a washer like piece with ridges to keep the motor unit from spinning up, but, particularly on an aluminum frame, a solid stopper (the down tube) is also needed to prevent it from spinning.
On a delta trike the frame extends beyond the bottom bracket to accommodate the front wheel fork and that part of the frame serves the same purpose as the downtube on a regular diamond frame bike.
On a tadpole trike or a SWB recumbent bike there is a torque problem. If the BBS02 is mounted with the motor unit upside down and resting against the main frame or boom the drain holes built into the controller housing of the BBS02 are on the top instead of the bottom. If the BBS02 is mounted in its intended orientation then a separate torque arm of some sort needs to be added.
