Quoting from the official clarification page: 02/16/2012 - 16:26 Does the axle need to lift the mass directly, or can it operate a pulley system to lift the mass?GoNerdHerd wrote:. Sorry, I'm still not quite sure of the answer to this. Would a "anchor" be illegal?chalker wrote:hogger wrote:According to the rule, the paddle is attached to an axle that in turn attaches to a string that wraps around itself as the wheel turns. Does anyone think that the string can be hoisted up high and hung off an anchor before attaching to the mass? Would that be illegal and considered a pulley? Or maybe pulley is allowed at this point since rule (2) in part m only prohibits attaching pulley where the wheel connects to the axle.
FYI, there have been numerous questions submitted to soinc.org about things like this. The general response is NO PULLEYS at all in the final task. Of course if you want an official response to your specific design, feel free to submit a clarification request on soinc.org
Yes, the string wrapping around the axle must lift the mass directly. A pulley must not lift the mass. No pulley system! That is part of the challenge."
In particular, "the string wrapping around the axle must lift the mass directly."