Future Gadget #204 2nd Edition Ver 2.34 // Trampa MTB // Fatboy Direct Drive 5:1 // eBoosted Double Stack Trampa enlosure // Fatboy Focbox enclosure + Dual Focbox // Sk8 192kv motors // 12s7p 30q
My fault dude , just wanted to ensure than anyone who came upon this thread would understand that none of those drives are Direct Drives. I am no warrior, I fight for no country.
Etoxx is wrong.
Fatboy is right
Yes. Carbons are the only DD that allow All 4 longboard wheels to be used. All other DD are hub motors so the Raptor 2 and Hummies are Techincally DD 1:1
Cool, I mean you shouldn’t since we should aspire to use correct terms for correct things since these build logs are look at by others but whatever. I meant no disrespect.
No you’re good , Hub motors are , by the def , Direct Drives as they are 1:1 and Direct Drives :
can be applied to any motor which directly drives a load or rotor without transmission elements such as gears, pulleys or chains.
I think my supplier said 0.2mm thick 8mm wide. I’ll have to check.
0.20mm will require a higher pulse, transferring more heat
Aight, we cool. It’s just any DIYer I talk to in person knows what I’m talking about when I say direct drive, so it was never really an issue for me but you’re right someone reading this thread might get confused if they didn’t know their stuff.
So I rethought how I’d do my batteries. Instead of pcb’s on the top and bottom of the enclosure I might do a sole bus bar with bent nickel strips separated by a film of kapton / fish paper. Each series cell will be connected from bus bar to bus bar using two 12awg wires. Any issues with this design? Vibrations? Current draw of 8p on a single bus bar? Temps?
I’ve been enjoying riding this thing too much that I’ve put off on updating my build thread. Anyway, here are the updates:
My original plan was to do a 12s8p top mount but @Eboosted just released a double stack version of his HS11 enclosure so that finally swayed me to do bottom mount.
The biggest problem I faced with this setup was the 150 amp bms that I already had. I figured if I cut off the heat sink a bit the pcb might still fit.
Battery building time. First I built the 4p packs
I got a hold of some pcb’s from @Kaly
Test fitted them out on one of the 4p packs. I also took this time to build my 8p packs. I used Dow Corning 795 industrial strength silicone to bond two 4p packs as using silicone over hot glue helps with vibration dampening. At first I was skeptical when I was advised to use silicone, but shit is no joke, it’s used to hold glass windows.
If you saw my previous updates, I was trying to figure out how to build my 8p packs. Ended up being lazy and went the simple route.
Test fitted them out on the enclosure then I hit my first snag. I’ve posted about this on his enclosure thread, but the imperfection within the inside walls of the enclosure ended up pushing my cells inward
Ended up having to dremel a few mm to flatten the walls
I used some flat braided wire to make the series connections. I was debating on using this over two 12 gage wires but ended up with this for simplicity.
Now the balance cables. I used the channel on the side to route all of my balance cables. Looks cleaner that way plus it won’t have the enclosure pressing against it compared to having them run on top of the cells.
Enclosure time. I was originally going to use @Kug3lis’s top mounted dual focbox enclosure but he just released his evolve style bottom mount cooling plate, and me being myself jumped to try out the newest shiniest thing.
To make the hole for the cooling plate, I took a piece of plastic (the more rigid ones, think uniqlo underwear packaging) and traced an outline that I then taped on the enclosure.
After dremel-ing the hole I used sand paper to get a nice fit.
Once more, I used some silicone to glue the cooling plate in place.
Came out really clean
For the focbox wires, I used some rubber grommets.
To make sure the phase wires don’t push in all the way when I insert the bullet connectors, I cut of some heat shrink off of the bullet connector, inserted the bullet connector through the grommet, and heat shrinked it again on the outside
Also a few parts got changed along the way. I bought a used @Kaly direct drive and a smaller 60 amp bms
Unfortunately I didn’t take any much process photos as I was nearing the end of my build (too eager to ride it) so here’s a couple of pictures of the finished product:
Oh you might also be wondering why I have a stealth in the last picture even though I’m building a DIY and I already have an existing v2. Well I won it for free a few weeks back from the boosted summer showdown contest.
12S7P flexible battery pack
eBoosted Enclosures thread
This must be the best Trampa build ever, direct drives, an amazing work on the battery/enclosure and tons, TONS of AMPs! Congrats Neil must be the fastest board in town
Yeah, coming from a boosted, my body is not ready yet for this speed and acceleration. I was getting anxious when I was hitting the 30mph mark:
But damn, that was what, 70% duty cycle at 30mph? This thing can go so much faster if I had the balls to push it. In time, I guess. Plus I need to do something about the speed wobbles. Time to put on the dampas.
Trampa like deck..?
Take your time brother
It really hurt to hit the ground at this speed
That’s one sweet build man. Love the way you have everything under the deck. I didn’t think this would be possible to do, but with that new enclosure (and some clever thinking on your part) it takes it to another level.
Dibs dibs dibs and dibs
Mate this build is really cool and I for one have been getting a lot of motivation and inspiration watching the progress. I’m going to be making a Trampa build soon and your build will definitely be getting some kudos as the main inspiration!
Nice board, you will have tons of range
What are these purple connectors for the sensors called? and where I can finde them?
Thanks everyone for the compliments, I really appreciate them!
Looking forward to what you’ll come up!
I think they’re called x pin circular connectors (where x is the number of pins) but I’m not entirely sure. @kaly was the one who modified these cables so he might have a better answer for you.
Whats the Range
About 40 miles. I average about 25wh per mile with this setup.
How is the weight? I’m planning a similar build but am unsure about the weight about 8p