Mountain Biking - dh frames

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dxc
05-31-05, 08:57 AM
what do you think about my frame design? i never build the prototipe :(
email me for scale and details.

you can see the movement from ltx file (EvolutionX.txt, rename it to EvolutionX.ltx) now, open it with the program Linkage you can download it at http://www.extra.hu/linkage/eng.html

FoX Rider
05-31-05, 08:36 PM
Theres no seat or spokes on those wheels! I bet it would work without them though.
snakehunter
05-31-05, 08:43 PM
Chain suk anyone?!?!?!??!! I dont like the 'floating' BB too weird. But meh, its your cash bro.....

Dirtbike
05-31-05, 09:02 PM
Chain suk anyone?!?!?!??!! I dont like the 'floating' BB too weird. But meh, its your cash bro.....

Yeah, floating BB doesnt work out too well. It kinda defeats the purpose of suspension. Its like the wallmart bikes with URT and the BB is on the swingarm.
dxc
06-02-05, 09:08 AM
i see manufactures use the floating bb at their frames, like Mongoose Bikes Black Diamond Triple Hardtail Mountain Bike and GT with their i-drive
anthonaut
06-03-05, 03:58 AM
I remember when i had a go at designing a DH bike. Turns out its exactly the same design as the Nicolai Nucleon, but without the gearbox.

But nice work with the design. Looks good to me.
robo
06-03-05, 09:32 AM
How did you design that? Was it basically 'by eye', or did you take into account things like pedalling induced shock compression, and how the bb moves when the linkage moves?

In the first design, it looks like hard pedalling will cause the suspension to bob. The moving BB seems interesting.. did you calculate it so that the BB doesn't move forward or back when the linkage moves, or did you just eyeball it?

Nonetheless, cool! :)