[Sandwich]

does anyone know the correct axle path of the vpp?

i've been reading their patents, and it appears as though it swings out, so the hub goes further away, and then swings back towards the bike, like
/
/
|
\ BB

Almost. I always thought it would be
\
\
|
/ bb

So that the chain would pull from both the top and bottom.

What am i missing here?

More info:
Patent image and
Patent info

Any help would be greatly appreciated, as I am designing a bike with a similar linkage, but i hope to acheive an axle path that looks like
\
|
\ BB

Also, the current patent states "an axle path with a larger arc at the bottom and a decreasing arc at the top of the travel" Ack. Does this destroy any opportunity for my design, or is the patent pretty much limited to santa cruz's designs.

one more, another thread on this.
proto

 

[SwisSlesS]

A question about VPP? I'm not even gonna toch this one.

 

[rbx]

yes the vpp axle swings back in the first part of the travel in order to reduce 'bob' and then swing foward toward the bikes to reduce pedal kick back.

 

[ohio]

Originally posted by rbx
yes the vpp axle swings back in the first part of the travel in order to reduce 'bob' and then swing foward toward the bikes to reduce pedal kick back.

that's the patent, in reality it's nearly straight for the first half to two thirds, and then swings forward. But the effect is the same as the patent, decreasing chain growth to the sag point, increasing chain growth after, until about 2/3rds in it arches forward for zero chain growth.

 

[Gyro Gearloose]

You shuld go play with linkage.. found at:
http://www.mtbcomprador.com/pa/english/
werry nice program for simple pathanalysis and som of the more common frames are already included like the v10...