Thread: Andy Mark Supershifter with Pneumatic shifters
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Unread 09-09-2012, 21:51
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Re: Andy Mark Supershifter with Pneumatic shifters
Quote:
Originally Posted by Coffeeism View Post
Why should it be 60 PSI? Shouldn't it be closer to the actual force required?

The own shifters we had we've always run at 20 PSI for the solenoid valves sake. I was under the assumption that it took less force than the 12 lbs to shift but I could be wrong about this as I have no experience with the super shifters.
We run our SuperShifters at 20 psi as well without issue. 60psi shifts with 27 lbs of force (force = pressure*area, where the Bimba 040.5-DP has a 3/4" bore).

Another setup that I've heard of is using a window motor coupled to both transmissions with a spring setup to engage the gear if it is not lined up during the initial gear change request. I do not know what team had this setup, but it is definitely worth researching some more as it could offset the weight of a pneumatics system, even those with pvc air reservoirs.
Last edited by protoserge : 09-09-2012 at 22:08.