However, from the figure above, we can see that the power coefficient is a function of the tip-speed ratio.
22.
A continuously variable transmission, or CVT, offers a near-infinite range of speed ratios _ essentially, a near-infinite range of gears.
23.
The assumption of constant power thus allows use of the speed ratio to determine the maximum value for the mechanical advantage.
24.
To reduce sympathetic vibrations, the two turbines should turn at speeds with few common multiples, for example 7 : 3 speed ratio.
25.
In large speed ratios or small central distances, the angle of contact between the belt and pulley may be less than 180?
26.
That is to say, for a fixed-speed wind turbine, the value of the tip-speed ratio is only changed by wind speed variations.
27.
Theoretically, an infinite number of blades of zero width is the most efficient, operating at a high value of the tip speed ratio.
28.
Below is a plot of the variation of the power coefficient with variations in the tip-speed ratio when the pitch is held constant:
29.
The rate of fire is increased by using a battery with a higher voltage, high-speed ratio gears and / or a high-speed motor.
30.
A first gear with higher-than-average speed ratio, combined with the feeble low-speed torque, makes it a fairly difficult bike to start from standstill.
