Excelsior/Strong GTS Cromotor Build

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pucksterpete   1 kW

1 kW
Posts: 319
Joined: Apr 15 2011 11:11am
Location: Paris France
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Re: Excelsior/Strong GTS Cromotor Build

Post by pucksterpete » Nov 30 2015 8:50am

Well, some fun stuff today. A little while ago I dropped my pack down to 84V from 100V, fully charged. Reason being some cells on some packs where not balancing and were not holding voltage at a respectable level. So weeded out the bad and made a 84V pack.
I have had these packs since Spring 2013.
I had made earlier during the summer an aluminum battery box, to be able to take on and off the bike, I felt a little better with this box on the bike knowning the batteries were getting old.
When I am done riding I store the pack inside the aluminum box and also in a large ammo case, also the pack stays inside the ammo case when charging.
Rode the shit out of the bike, lots of cycles.
Anyways, today was like any other day. Charge up and go.
2 smoke detectors one inside the ammo case and one outside of it.

Well, they went off and here is the result, happy to stay the ammo case did its job, the aluminum box sort of.
I went out in the garage when I heard the beeping going off, lots of smoke and one BIG pop & flash within the ammo case, then I dragged her out side.

So, I get to decide on new batteries, do I still go with Lipo or something safer? I had previously a 52V liFePO4 A123 cells from Paul at EM3EV running on another bike, but my problem with that pack was that one cell had went bad and I don't have the expertise or tools (tab welder) to change out the bad cell.
Anyway here are some pics

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Optim Alp Hardtail with MXUS Motor
20S 2P Turnigy 5.0 Hard Case
Top speed 38mph tops :)
Hyena Special
http://endless-sphere.com/forums/viewto ... 97#p585997
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Excelsior/Strong GTS with Cromotor
24S 3P Turnigy 5.0 Hard Case
Top speed so far 53mph
http://endless-sphere.com/forums/viewto ... =6&t=46993

markz   100 GW

100 GW
Posts: 6141
Joined: Jan 09 2014 11:38pm
Location: Alberta Canada

Re: Excelsior/Strong GTS Cromotor Build

Post by markz » Dec 09 2015 12:35am

I made a mental note of what you did, the ammo case and the smoke detectors did their job.
Funny thing is my frame is holding up well, though I have done little riding on it. I am 330lbs. Not fat, just kinda fat but its spread out in the tallness.
Its always been in the back of my mind about the cracks in the frame others have experienced. I am thinking about building a 2 transformer arc welder, I am just confused on the whole using two outlets on different circuits and finding them 180 degrees out of phase. The panel and vac is on its own circuit so 50A can go in easily. I can just rent a welder at a DIY auto garage, its like $25/hr arc or $35/hr tig. New cheap-brand Jobmate welder $200, Mastercraft $280 with grinder, used old $50+, used newer $150+.
Yeah I am buying used, found one for $80. Im not F'ing around with outlets.

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pucksterpete   1 kW

1 kW
Posts: 319
Joined: Apr 15 2011 11:11am
Location: Paris France
Contact:

Re: Excelsior/Strong GTS Cromotor Build

Post by pucksterpete » Dec 09 2015 3:31am

I wish I had welding skills myself would make things a lot easier
That time I got lucky with ammo case.
Last night just dropped another $600 on batteries, going to run 4P @ 84V, was at 3P 100V, but I don't the speed that much when I'm in the forest.

Good luck with your welder.
Optim Alp Hardtail with MXUS Motor
20S 2P Turnigy 5.0 Hard Case
Top speed 38mph tops :)
Hyena Special
http://endless-sphere.com/forums/viewto ... 97#p585997
-------
Excelsior/Strong GTS with Cromotor
24S 3P Turnigy 5.0 Hard Case
Top speed so far 53mph
http://endless-sphere.com/forums/viewto ... =6&t=46993

markz   100 GW

100 GW
Posts: 6141
Joined: Jan 09 2014 11:38pm
Location: Alberta Canada

Re: Excelsior/Strong GTS Cromotor Build

Post by markz » Aug 19 2017 9:31pm

My Strong GTS broke the top mount of the shock, just like yours but a bit differently.
https://endless-sphere.com/forums/viewt ... 50#p942464

It originally collapsed the tube, but it stayed in place but sandwiched down.
Lasted a month or two, then when I was riding my pedals kept hitting the ground, and I stopped and looked.
I was resting on the rear rack bars.
busted1.jpg
busted1.jpg (179.43 KiB) Viewed 159 times
busted2.jpg
busted2.jpg (137.47 KiB) Viewed 159 times
busted3.jpg
busted3.jpg (187.34 KiB) Viewed 159 times
busted4.jpg
busted4.jpg (169.02 KiB) Viewed 159 times
I have since looked at $20 motorcycle shocks, the MT80 looked alright, but I couldnt compress much. I didnt really try hard neither, like I didnt put my entire body weight on it to compress it, since it may have slide out, plus the shop was busy. Maybe theres some childrens motorcycles 50cc with shocks that may work.

RFY is a clone of a decent shock.

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