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In an accelerating motorcycle, we know that acceleration tends to squat the rear end of the bike as weight is transferred aft. The percentage of
In an accelerating motorcycle, we know that acceleration tends to squat the rear end of the bike as weight is transferred aft. The percentage of weight transferred depends on acceleration, wheelbase, center of mass height, and static fore/aft weight distribution. a.) What effect does chain tension have on the motorcycle's tendency to squat under acceleration? Does it increase it, decrease it, or have no effect? Please explain your answer. b.) The upper chain run is horizontal, the swingarm is 21 ⅝” in length and angles downward from swingarm pivot to axle at 15 degrees, and the rear sprocket is 9 ¼” in diameter. The chain and swingarm are conventional--no extra idler pulleys. Assuming tension in the upper run of the chain is To lbs (where To is approximately estimated using stats from Triumph’s website), what is the direction and magnitude of the force at the rear axle contributed by chain tension? Additional complicating data: Distance between sprockets = 25 ½” The swing arm is shorter than the chain length. Please look closely atthe photos to understand why and how the transmission output is not concentric with the swing arm pivot.
