makepeace
10 mW
- Joined
- Sep 25, 2014
- Messages
- 34
Sup folks
New here, name is Jono and I'm from Cape Town - South Africa, studying electro-mechanical engineering at UCT.
Anyway, I've been bitten by this bug since sometime last year and have been lurking on this forum and others since then, but I've finally decided to dive in and build my first e-board. It's mostly going to be for travelling to and from uni (about a 6 km return trip), but also for just cruising around to friends etc. I'm keen on at least 15 km range once I'm done tinkering. Been ordering parts the last few days (much to the displeasure of my wallet). Here's what's on the list so far:
2 x 250mm (axle measurement) eBay clone trucks, they're kind of Randal looking
4 x 90mm 78a Abec 11 Flywheel eBay clone wheels (come with bearings and spacers)
Some Blood Orange barrel and cone bushing sets to play around with
2 x NTM Prop Drive 50-60 270 KV motors
1 x Alien Power Systems 120A 2-8S Car ESC BEC Twin
8 x 5.8 Ah 25C single cells
I then ran out of money. I planned (and eventually plan) on getting 16 of them 5.8 Ah cells to make a 11.6 Ah 8S2P 25C pack. That should do me way more than enough run time, but I'm sure 5.8 Ah will be plenty for now.
Anyway, will most probably buy some "proper" trucks, wheels, bearings etc anew once I've managed to stockpile some more cash.
So the plan is to go for the diagonal drive arrangement with a 1:2.5 RR for the moment, so probably 12T -> 30T which should give me about 38 km/h (being quite conservative), and enough torque with 2 motors for some decent climbing capability (my uni is at the base of Table mountain, quite a bit higher than where I stay). Will see what happens as I get a bit braver.
Still need to order a drive pulleys and belts. Probably going HT5, 9 mm wide. Also need some fasteners, and perhaps some risers - will see.
I'm going to take the frugal option and get as many of my other parts laser cut from alu-alloy plate, which I'll design myself. These include motor mounts, truck clamp brackets, driven pulleys + guides and any additional parts for the wheel attachment to the driven pulley. Also going to take a frugal approach on the deck, which I will make myself. It's probably going to be a birch + maple veneer ply with some alu-alloy reinforcement. Going to base it on the Landyachtz Tomahawk (if anyone knows of any similar decks, please let me know - need inspiration). Probably about 995 long, 240 wide, 605 WB and about 16mm thick.
I plan on doing something a little different with the battery arrangement, hence the 136 x 50 x 10 mm single cell batteries. I want to rout cavities in the deck on either side of the centerline from the bottom, to house the 10 mm batteries in the deck. I'll then clad it on either side with (quite thin, probably 2 mm) alu-alloy panels, one of them being easily removable to get to the batteries. I'm not 100% sure about how this will turn out, and I may fiddle with this idea a bit. It's mostly for protection, but also to look a bit more polished.
Thoughts, comments, crits all welcome
New here, name is Jono and I'm from Cape Town - South Africa, studying electro-mechanical engineering at UCT.
Anyway, I've been bitten by this bug since sometime last year and have been lurking on this forum and others since then, but I've finally decided to dive in and build my first e-board. It's mostly going to be for travelling to and from uni (about a 6 km return trip), but also for just cruising around to friends etc. I'm keen on at least 15 km range once I'm done tinkering. Been ordering parts the last few days (much to the displeasure of my wallet). Here's what's on the list so far:
2 x 250mm (axle measurement) eBay clone trucks, they're kind of Randal looking
4 x 90mm 78a Abec 11 Flywheel eBay clone wheels (come with bearings and spacers)
Some Blood Orange barrel and cone bushing sets to play around with
2 x NTM Prop Drive 50-60 270 KV motors
1 x Alien Power Systems 120A 2-8S Car ESC BEC Twin
8 x 5.8 Ah 25C single cells
I then ran out of money. I planned (and eventually plan) on getting 16 of them 5.8 Ah cells to make a 11.6 Ah 8S2P 25C pack. That should do me way more than enough run time, but I'm sure 5.8 Ah will be plenty for now.
Anyway, will most probably buy some "proper" trucks, wheels, bearings etc anew once I've managed to stockpile some more cash.
So the plan is to go for the diagonal drive arrangement with a 1:2.5 RR for the moment, so probably 12T -> 30T which should give me about 38 km/h (being quite conservative), and enough torque with 2 motors for some decent climbing capability (my uni is at the base of Table mountain, quite a bit higher than where I stay). Will see what happens as I get a bit braver.
Still need to order a drive pulleys and belts. Probably going HT5, 9 mm wide. Also need some fasteners, and perhaps some risers - will see.
I'm going to take the frugal option and get as many of my other parts laser cut from alu-alloy plate, which I'll design myself. These include motor mounts, truck clamp brackets, driven pulleys + guides and any additional parts for the wheel attachment to the driven pulley. Also going to take a frugal approach on the deck, which I will make myself. It's probably going to be a birch + maple veneer ply with some alu-alloy reinforcement. Going to base it on the Landyachtz Tomahawk (if anyone knows of any similar decks, please let me know - need inspiration). Probably about 995 long, 240 wide, 605 WB and about 16mm thick.
I plan on doing something a little different with the battery arrangement, hence the 136 x 50 x 10 mm single cell batteries. I want to rout cavities in the deck on either side of the centerline from the bottom, to house the 10 mm batteries in the deck. I'll then clad it on either side with (quite thin, probably 2 mm) alu-alloy panels, one of them being easily removable to get to the batteries. I'm not 100% sure about how this will turn out, and I may fiddle with this idea a bit. It's mostly for protection, but also to look a bit more polished.
Thoughts, comments, crits all welcome