Etard Ghetto Fabulous Hill Hacker

[etard]

Let me first put on my flame suit, before you look at these pictures..... :lol:

Hey, the Hacker is purple anodised, so I had to stick with the theme. Besides, I want this to be seen.

What I have here is a project I had going a long time ago and shoved to the side until recently. I have decided to go ahead with this as proof of concept for a detachable hill climbing system for Downhill Ryders. I think two tool batteries with a motor geared for 15 mph should be able to get the rider up some pretty good sized hills, but I am not sure of this. I don't think my drive system is very robust in current guise. And the list of loose ends is kinda daunting. The motor needs an outboard bearing, change from bike chain to #219, add caps, add golf club shafts for bracing to axle, solder, wire, add throttle, DONE!! Yeah right....

If you guys have any suggestions of how this can be improved, please chime in. And yes, you can get go Kart axle hub in purple.

 

[etard]

I also have a few friction drive concepts in various stages of disarray. Here is one that mounts on your seatpost and swings down onto the tire to be clamped at the right spot, hardtail only. Or I was thinking of trying to adapt some sort of spring like a wound up rubber band for suspension bikes that would ride on the tire and apply a certain pressure through the suspension stroke. I want to keep it single arm style, and have motor and roller shaft be one long piece. might be alot of twist force, don't know how much material would be required. So if anybody knows how to apply a spring action for this motion, I am open for suggestions.

 

[etard]

I finally got some pictures, can you guys tell? :lol:

This is the bike I want to put my direct drive setup on. The frame has bungs for Cantilever brakes, and a flat bar for third mounting point over tire. This drive will also be easily removeable. It's a pretty cool design, the BB is the axis of suspension travel so no chain growth. Its also Canadien, is that good? :lol:

 

[AussieJester]

I would serious consider NOT using that clamping method of attaching the sprocket to the spokes
buy an adapter and fit it to the hub...

Best of luck...

KiM

p.s that frame looks like a direct rip of the Kona Stinky to me?

 

[deecanio]

nice bike!!! stick a recumpence and some lipo in it and your home!!!!
keep the setup light and it should rocket, all terrain looks like a corking project to me, good choice of bike
i like the stem bracket, reminds me to go measure my seatpost and the bearing tube
what are your plans for drive system? recently ive been thinking about grinhills build again and wondering how that would work with twin freewheels
looking forward to the build!!!

D

 

[spinningmagnets]

I like it, and I am pleased to see more rear suspension non-hub builds. I would strongly recommend adding a post to both sides of the suspension arm to the mounting plate, and also moving the batteries.

Perhaps move the batteries to either side of the seat post if you want the wires to be short, or to the frame triangle. Just a thought....

 

[etard]

Here is a clamp system, thrift store find, this I want to also detach with ease, but I need something to shim, or comform to the frame more. The clamp system does have two divot screws, and I'm not afraid to use them. I jusy have alot of ideas on what would be best for my needs, and I need to commit to only one for now. So guys, what looks promising, what will fail, and what is a no go? :? Here are more pictures of the friction drive, this I will prolly mount on a bike for the girlfriend. It will only run 1000-1500 watt.

AJ,
I will not be using that crappy sprocket, I was never able to get it centered, and its ugly as hell. Just put it there to illustrate the general direction I was going.

Spin,
Thanks, I have struggled to find a decent way of attaching to the rear triangle on full suspension, direct drive on brake bosses is the best way, I feel.