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Finally finished my Montague Paratrooper. I'll be using it as a commuter. I wanted a folding bike I could take with me when I'm out of town on a project - usually in rural Colorado mountain towns - something that could be kept in my hotel room overnight.
Made some work stands to hold the bike up. Used some 2x3 and 1x2 I had laying around. IIRC, the 2x3s on the floor are ~15" long and the 2x3 that sticks up and prevents the bike from tipping were cut at a 20* angle, IIRC, those are 18" long. Anyway for next to nothing, these things are great.
The challenge on this bike was mounting the Hailong Battery (48v 20ah). The space under the top tub is too tight to mount the battery conventionally. I thought the battery looked goofy on the top tube and I didn't want to mount it on the rack. The main issue is if I mount the battery "normally", it doesn't leave enough room to slide the battery off/on it's cradle. I was ~1/2" short of the space needed. I finally figured out if I reversed the battery AND released the frame quick release that created enough space to slide the battery off/on the cradle. I mocked up a bunch of different ideas and finally came up with using a Double Bob style battery mount. I installed three rivnuts into the bottom of the top tube and used hose clamps to mount the rail. The hose clamps are wrapped in 3/4" Marine grade 3:1 heat shrink. Throw in a couple 2" velcro straps and this set up is solid AF. Using the Double Bob also created enough space between the battery and frame for me to run zip ties.
The battery does interfere with turning the front tire, however, I can still turn tight enough to make a u-turn in a residential street. However, the wheel only turns ~45 degrees, so 90 degree turns while walking the bike are out of the question. If I had to do it again, I'd get a triangle battery pack. es. The clear cord/hose guides really came in handy. Wish I would have known they come in black.
Turns out the cables need to go on the other side to accommodate the way the bike folds. Luckily zip ties are cheap and plentiful. Whoever invented them deserves a Noble Prize.
