Timma2500
1 kW
Yep. The extra storage space would be handy for batteries etc, but yeah, you'd be on a limited time frame before the cops spot ya...Hyena said:My thoughts exactly. Having motorbike performance when no one is looking is one thing, but try coasting down a footpath with the engine off on a dirt bike and see if it doesn't get the cops attention.
Using those plates with no actual torque arm, would that place extra stress on the dropout and its fixing points to the seatstay and chainstay? I think they are a nifty idea but would i have to beef up the chainstay and seatstay to dropout points with strong gussets if used on their own to help the dropout cope with all that force?Hyena said:I think on a custom frame 'torque plates' rather than arms are the way to go. If you could make an oversized flat Al drop out area with a deep slot you could then easily bolt a steel plate to it. It wouldn't even have to be a 14x10mm axle hole - just a 10mm slot in the steel plate that bolts up the opposite way to the drop out would do. (something like these that I made but up the other way)
Don't mind if i need to if it helps keep strength up :wink:
Hyena said:I agree your integrated RC drive is very cool and stealth but unless you're planning to offer them practically 'turn key' I think alot of people with lesser skills will have trouble getting it all up and running. If you're going to buy the frames in bulk you definitely want to cater to the hub motor or 'I want a frame with integrated battery space' crowd. As far as building frames from scratch goes, it'd pretty much be worth your while to buy those little dirt jumper frames for <$100 to cut up for all the relevant parts wouldn't it ? (heat tube, bottom bracket etc )
Keep the ideas comin boys!
I'm not going to offer the gearbox i've used just for cost reasons - the shaft i could get CNC'd but the housing and large pulley also require machining and would have to be done by hand and thats where the problem is. My machinist charges around $100/hr so the cost would soon balloon out quite a bit by the time each housing and belt pulley are put in the lathe's chuck, clocked up then machined. If people really want to use the same gearbox as i and i get enough requests, then maybe i will look into doing it but it wouldn't be cheap! The frame will be setup so this can also be used later down the track anyway. With frame parts, buying the individual parts it seems is reasonably priced - headtubes and bottom brackets can be had for about $10USD each, pretty reasonable i thought! And saves alot of time cutting/grinding parts.
Thats right. All i can offer them is battery space, somewhere to bolt their controllers and stronger dropouts. That would probably address all their needs unless a hubmotor user can come up with anything else they'd want in a framej3tch1u said:not to knock hub motors, they have their place, but there is not as much value you can add to a frame designated for hub-motor (ergo lower price bracket).
Paul