3 speed transmissions

[Pat Roche]

Originally Posted by neoshaakti

Im pretty new to the concept of two or three speed transmissions (our team just stuck to the KOP toughboxes)
What exact do those pneumatic pistons do?

The pneumatic piston is used to shift the dog between gear sets. The gears that the dog engages are on bearings so they can spin independent of the driven shaft. The pneumatic pushes the dog against the gears locking them against the gear to power it. The dog is basically a rotating disc that engages into the gear via pins or other couplers. In the pictures posted above there is an internal shaft that the pneumatic pushes that is pinned to the dog.

Also if you are looking to make your own three speed transmission I would suggest looking up team 222 Tigertrons. They have a really sweet three speed transmission that they've used in the past (I haven't seen them this year so I'm not sure if they used it again or not).