Quote:
Originally Posted by Ether
Yes, useful exercise for students.
The numbers above can't be used, of course, to answer the original engineering question, to wit: all other things being equal, how much acceleration advantage does a 4" wheel vehicle have over a 6" wheel vehicle (where both the 4" and 6" wheels have been reasonably individually optimized for the vehicle).
Does anybody have CAD models (from this or past years) of 4" vs 6" drive train options which included enough detail to calc the mass and moment of the wheels?
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Our 4x2" wheels this season are .8 lb-in^2 and our 1" ones are .467 lb-in^2.
Modifying the 1" wide wheel to a 6" diameter and changing no other factors (face thickness, spoke width, etc...) results in 1.999 lb-in^2. The design appears to weak for such a diameter though, and would likely need more material, increasing that number. These are both very light compared to the available COTS wheels.