Aesthetics: Quantification and Deconstruction by Sushil Chandra

Author:Sushil Chandra
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

2.Equivalence ratio: The carburetor or FI system is designed for fuel air ratio to give peak torque at desired speed.

3.Intake manifold length and diameter.

4.Bore stroke ratio: As the stroke increases, the lower in the rpm range, the peak torque will occur. In addition, a longer stroke engine will produce less peak HP but more peak torque.

5.Exhaust pipe length.

Rake angle and wheel base are the parameters which decide the stability and maneuverability of a bike. By looking at these values (refer following tables), it is clear that cruiser bikes need a higher rake angle because for these bikes stability is the most important requirement but maneuverability is low. Same goes with wheel base as higher wheel base provides more stability and lower turning radius (hence less maneuverability). Conversely, for sports bikes lower rake angles and lower wheel bases provide low stability but higher maneuverability. This can be explained by the fact that stability and maneuverability of a bike are broadly determined by two factors—yawing moment (stability decreases with increase) and steering ratio.

Yawing moment = twisting moment, self-aligning moment [2].

Self-aligning moment = a t x cornering force where a t = trail a t = a t0 (1 − λ/λmax) where a t0 = maximum trail, λ = side slip angle λmax = maximum side slip angle.

Since maximum trail is a function of rake angle, wheel size and front fork offset, largish rake provides maximum stability.

Now, steering ratio which indicates the steerability of the vehicle is given by expression

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