2WD Semi-Recumbent Recycled-Parts Cargo eBike: "CrazyBike2"

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amberwolf
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Re: Semi-Recumbent Recycled-Parts Cargo eBike: "CrazyBike2"

Post by amberwolf » Jan 06, 2017 4:37 pm

Been using the EIG 14s1p pack from this on SB Cruiser since getting it operational again, as the A123 pack is insufficient to run SBC due to some odd behavior in the righthand motor controller of SBC cutting out at too high a voltage (which it didnt' used to).

But anyway, today I did some testing with a freshly-built (out of old cells but used a lot less than the original pack) 14s2p EIG NMC pack, vs the original 14s1p, just a couple of quick runs from 0-20MPH on each one.

Test done with each pack in turn, packed into the toolbox rather than working into the frame like normal (is a PITA). Each started out at 58v. Note that the 14s2p weighs twice the 1p, so the 2p's runs have that added maybe 20-ish pounds. (less than 10% of bike weight, probably around 6-7% total with me on there)
img_4066.jpg
img_4066.jpg (117.42 KiB) Viewed 732 times

The 14s2p EIG did better than the 14s1p, but is fairly close for this kind of short run at full charge. Probably see much more difference over a work commute, for instance. Took about 3-3.5 seconds 0-20MPH; distance in the street from the corner of my front yard to the side gate start. Run back was the same. Less sag than the other.
57.7 vrest
54.2Vmin
0.141Ah
8.2480wh
79.54Amax
0.071mi

The 14s1P EIG took about 4-4.5 seconds, going all the way past the side gate. Run back about the the same, maybe a hair more time and distance.
56.9 vrest
48.9Vmin
0.148Ah
8.1310wh
79.01Amax
0.081mi

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Re: Semi-Recumbent Recycled-Parts Cargo eBike: "CrazyBike2"

Post by amberwolf » Jan 17, 2017 5:13 am

For a while, CB2 is going to just be FWD, with the rear wheel/motor/controller, and just have a regular bike wheel in back, becuase I needed to move ti's motor/wheel over to SB Cruiser's left wheel, due to a problem with the 9C's axle on the hollow (inboard, wire) side.

See the SB Cruiser thread, past couple days' of posts, for more details on that.

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Re: 2WD Semi-Recumbent Recycled-Parts Cargo eBike: "CrazyBi

Post by amberwolf » Sep 02, 2017 4:13 am

So CB2 has been down essentially since the above. Well, it was functional minus the rear motor for a bit, but then I took the front forks off of it to swap with SB Cruiser and haven't gotten round to putting the SBC fork onto CB2. I keep intending to go back and fix it up so it can be my backup in case SBC is down, but whenever there's time either the weather hasnt' allowed it or else I wasnt' phsyically able to do it, and whenever I could've done it there's been no time. :/

However, I really came back to the thread to post this, that I found while I was looking at streetviews for something else (stupid traffic stuff in my area), for a post here:
https://endless-sphere.com/forums/viewt ... 3#p1316753

I found a perfect side view of CB2 in traffic, probably on my way to work, here:
https://www.google.com/maps/@33.5815784 ... 312!8i6656
dated September 2016, one year ago this month. :)

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crazybike2 sept2016 streetview 1.jpg
crazybike2 sept2016 streetview 2.jpg
crazybike2 sept2016 streetview3.jpg

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Re: 2WD Semi-Recumbent Recycled-Parts Cargo eBike: "CrazyBike2"

Post by amberwolf » Dec 20, 2017 5:01 am

While posting something else, I had a thought take over about making an SB Cruiser-like box frame for CB2, to improve it's cargo carrying ability, and it would end up something like this:
crazybike2 box frame version1t.png
crazybike2 box frame version1t.png (28.52 KiB) Viewed 131 times
where teh boxes at the rear are replaced with framed-in ones that are part of a seatbox like SB Cruiser's, though I'd still use the suspended-mesh seat CB2 presently uses, just bolted to the top of the seatbox instead. LIke SBC, the whole seatbox top and seat would fold forward to access teh inside of the box.

Teh steering and front fork would be the same, as well as handlebars, etc. I havent' finished the front triangle section but it'd be setup to hold the battery in it sort of like now, except not in an ammocan, but rather as sets of 4 to 6 cells as "book" blocks between cover panels.

The seatbox would not be as tall as SB Cruiser's, probably only a little mor than half as tall, but the rear boxes would remain the same size as the present ones, though shaped a bit differently at the bottom--instead of a regular box, they would have the outer bottom edge "bevelled" inward so tighter turns can be made (more lean before box strike on pavement would occur). I'd probably extend the seatbox downward with teh same bevelled area at it's outer ends, too (not shown in drawing yet). Would add a significant, if small, amount of storage space by doing this.

Not shown is triangulation beams; just to make the shapes clearer.

The whole frame should be stiffer than CB2's is presently, so I could probably revisit a middrive like the powerchair motors I used to mount under the frame by the cranks. I only abandoned that approach when hubmotors became an option for me, and I'd had so many derailments and parts destroyed.

If I used thin light wood to cover/fill the framespaces like i did on SB Cruiser, I might not need the triangulation of the boxes, as the wood would stiffen them being inside the frame itself.



I dunno that I'll ever build this, as the trike has more uses and I havent' even ridden teh bike in...a really long time (more than a year? two?). But I had the idea so I posted it so I won't forget / lose it, in case I do ever decide to revamp the bike and ride it again. Might be worth a complete rebuild, if so.

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