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Hi, 

Chris Callahan, UVM ag engineer has some additional info to add: 

"

The motor they have is fine, there is a prior thread on the topic.  ½ HP 1725 RPM.  Need to check whether the face is 56C or not.  It makes connecting to the gear reducer easier.

 

For gear reducers, they should search “56C 40:1 gear reducer”

 

Grainger: http://www.grainger.com/product/DAYTON-Speed-Reducer-4Z732

McMaster: http://www.mcmaster.com/#gear-reducers/=zivg0v

Zoro: http://www.zoro.com/dayton-c-face-speed-reducer-43-rpm/g/00121608/

The 56C face is a standard 4 bolt face that makes attaching the gear reducer easier and more stable.  Doesn’t look like the motor they have has that face."

I think this may be the previous thread he's referring to. 

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Schedule Saturday 9-10: Meet and greet, coffee, make a plan for the day 9:15: Put together first culticycle Once the first culticycle is assembled, we'll pause to do a design review and improvement brainstorm. 10-12:30: Build Break up into build groups Build Project Possibilities: 1 basket weeder 1 culticycle assemblies 1 culticycle build from scratch 1 belly mount ordered by Amy (@ Hawthorne Valley) 1 Brush weeder excercycle project 12:30: Lunch and Lunch Conversation: Commercialization: what might it look like? 1:30-?: Continue Builds end of build: Farm Hack happy hour either at Wenzaday's shop or out on the town. Sunday 9-12:30: Continue Build 10:00-11:00: Farm Shop Hacking: Techniques for Low Tech/Pedal Power Fabrication 12:30: Lunch! 1:30-?: Continue Build Demos (throughout the event): Grain grinder lu's culticycle
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I can't wait to see this design process unfold. It would be great to host a google hangout on this topic so that we can get more people who are interested talking together about this. Will you be joining us this weekend in Boston for the pedal power event?