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  1. Kodin

    Thin-lamination outrunners?

    So I've been doing a lot of research into components to strap to my longboard and asked a lot of ebay/aliexpress sellers for lamination thickness specs. So far only one aliexpress seller was able to provide any info, and it looks like the "fatjay" brand outrunners (at least in 63xx sizes) use...
  2. Kodin

    IP67-spec throttles?

    Question - Most of the electric throttle solutions I've seen are pretty cheaply made, and if left in heavy rain will likely saturate. Does anyone make a fully waterproof sealed throttle assembly?
  3. Kodin

    Ferrite as a stator material?

    Just curious, (and it's probably been asked before,) why is ferrite not used more often as a stator core material? For that matter, why not cast a composite out of epoxy or something that has the right ratio of iron and other materials required rather than cut super-thin laminate stacks and...
  4. Kodin

    Alternative motor shaft design and dropouts concept

    I've been thinking about it for a while, and I'm wondering why no one has considered designing a motor with custom dropouts and a shaft that can transmit torque more effectively to the frame. Looking at options, there's keyways, some sort of hex shape, or some sort of spline. I'm divided right...
  5. Kodin

    Keyed through-axle hubmotor conversion...

    Been thinking about 15 and 20mm through-axle hubs lately and it got me wondering - What stops someone from making a solid 15mm shaft, popping a hubmotor shaft off a hub, installing a key into the keyway of the stator permanently, and cutting a keyway slot in the shaft so it can slide in and out...
  6. Kodin

    500KG 4WD agricultural vehicle

    I'm looking at a project right now to build a four-wheel-drive agricultural vehicle with a target weight initially of 500KG, fully loaded. Wheels don't need to be very big, but it needs as high a torque as one can manage, with maybe a maximum speed of 10 MPH. Do hubmotors exist that could...
  7. Kodin

    Motors! How do we mod them?!

    So I've been following Justin's definitive cooling thread for a while and it's been giving me more and more questions as time goes on. First off, I was surprised to learn that stronger magnets may increase a motor's torque, but may decrease it's efficiency due to losses elsewhere. Questions...
  8. Kodin

    Sabvoton SSC048150 - NAKED!

    I got bored and took the case off my Sabvoton 48V controller. I was curious what sort of components were inside. Guess what? 24 Infineon 4110's, and 100V-rated caps! Photo dump below: The two black things around two of the phase outputs look to be inductive pickups for sensing back-EMF...
  9. Kodin

    SS spokes to ALU motorcycle rims - Anti-sieze? Grease? Lube?

    As I'm about to lace up my first wheel, just curious; I'm lacing into a 21" aluminum motorcycle rim, with stainless-steel spokes and nipples. To prevent galvanic reactions, I'm assuming I'll want to lubricate the contact surfaces between spokes/hub and spokes/rim. The question is, what do I...
  10. Kodin

    Tank Bike - (Previously: Yet Another Genesis)

    Welp, been lurking long enough, here's the start of my build thread. BACK TO THE DRAWING BOARD (April 2018) MAY 2019: And this is where I leave you once again hanging... The project has once again stalled due to funds, as I need a decent battery for this rig. Once I budget for...
  11. Kodin

    Turning 4130 - Now 4340

    Quick question for those with lathes, and have successfully turned 4130 or similar materials... I'm having a hard time getting decent finishes on this stuff with my Grizzly 13x40 "gunsmith" lathe. I'm using carbide insert tooling, and I've tried a few different tool geometries and chip breaker...
  12. Kodin

    "Affordable" variable regen input? (pressure transducers)

    Since my Sabvoton supports variable regen, I've been looking at options for creating a variable regen system that hooks into my existing brake handle. Been thinking the best option would be a moto hydraulic brake with a pressure transducer bolted to it. Anyone know of any transducers out there...
  13. Kodin

    Bypass balancing...

    I've been researching various BMS designs, and most if not all of them tend to rely on resistive loads to "bleed off" extra power when balance-charging lithium cells. This seems extremely wasteful to me, and I wonder, why is no one pursuing other options? Here's my idea: a BMS that will shut...
  14. Kodin

    Custom frame building advice

    After buying a motor, starting the wheel build, and starting a custom rear swing-arm fabrication, (Using the plasma cut parts from Barent's Farfle V2 kit), I'm thinking I might as well go for broke and build up a recumbent trike from scratch while I'm at it. I'm going to make the swing arm to...
  15. Kodin

    Recumpence offset adapters?

    Recumpence still selling these or has that resource dried up? I hear the tophat units are off 0.5mm, and I really don't want to make brass shims for the bolts... Any other options for chain to disc hub adapters short of buying a 13x40 lathe and the aluminum and doing it myself? (My 7x14...
  16. Kodin

    Bearings in a "Currie" 75mm planetary?

    Just picked up a 4.5:1 75mm planetary off ebay. Supposedly from a "Currie" scooter of some kind. Seeing how much play exists between the gears in the gearset, I wonder to myself... Would I benefit from taking the planetary carrier apart at the rivets, boring out the planetary gears, and...
  17. Kodin

    Controller options, belt reduction?

    Just bought a Turnigy Aerodrive SK3 5065, supposedly wound for 236 KVA. http://hobbyking.com/hobbyking/store/__18126__Turnigy_Aerodrive_SK3_5065_236kv_Brushless_Outrunner_Motor_.html I figure before I start my ebike build I'd buy a cheap motor and see what kind of power I can get out of it...
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