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#28
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Re: 6WD vs 8WD
Quote:
1) How long does it take to go 16m when you are traction-limited the whole way? Ffriction = 1.0 (CoF) * Wrobot (because Ff = mu * Fnormal) a = Ffriction / Mrobot (because F=m*a, so a=F/m) a = G (because Wrobot/Mrobot = G, gravity) D = .5 * a * t^2 t = sqrt(16 m * 2 / G ) t = 1.81 seconds 2) How fast are you going just before you hit the wall? v = a * t v = G * 1.8 seconds v = 17.7 m/s 3) At this ultimate speed, we are barely traction limited, so: P = F * speed (1 Watt = 1 N * m/s) F = Wrobot speed = v = 17.7 m/s 1200W = Wrobot * 17.7 m/s Wrobot = 67.8 N = 15.2 lbs So yes, less than 4 CIMs and one battery. |
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