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Originally Posted by xForceDee
how do I go about calculating theoretical speeds in high and low gear?
I understand the basics of gear ratios, so I guess the bigger question I have is the friction and weight factor.
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So you want a theoretical calculation that includes friction?
Friction is highly variable and difficult to model accurately. It is therefore typically modeled with an adjustable parameter(s), whose value(s) are obtained empirically, and may be different from one drivetrain to the next, even if they are the same design.
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However, if someone could run through the entire process, I think it would be very beneficial to other teams.
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JVN's drivetrain speadsheet in CD-Media:
http://www.chiefdelphi.com/media/papers/2755 (2013 version)
http://www.chiefdelphi.com/media/papers/2059 (2008-2011 versions)
http://www.chiefdelphi.com/media/papers/1469 (2004 version)