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  2. Capstan equation - Wikipedia

    en.wikipedia.org/wiki/Capstan_equation

    The capstan equation[ 1 ] or belt friction equation, also known as Euler–Eytelwein formula[ 2 ] (after Leonhard Euler and Johann Albert Eytelwein), [ 3 ] relates the hold-force to the load-force if a flexible line is wound around a cylinder (a bollard, a winch or a capstan). [ 4 ][ 1 ] It also applies for fractions of one turn as occur with ...

  3. Atwood machine - Wikipedia

    en.wikipedia.org/wiki/Atwood_machine

    Atwood's machine is a common classroom demonstration used to illustrate principles of classical mechanics. The ideal Atwood machine consists of two objects of mass m1 and m2, connected by an inextensible massless string over an ideal massless pulley. [1] Both masses experience uniform acceleration. When m1 = m2, the machine is in neutral ...

  4. Revolutions per minute - Wikipedia

    en.wikipedia.org/wiki/Revolutions_per_minute

    1 / 60 ⁠ Hz = 0.01 6 Hz. SI base units. 0.01 6 s −1. Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or r⋅min−1) is a unit of rotational speed (or rotational frequency) for rotating machines. One revolution per minute is equivalent to ⁠ 1 60 ⁠ hertz.

  5. Belt friction - Wikipedia

    en.wikipedia.org/wiki/Belt_friction

    The equation used to model belt friction is, assuming the belt has no mass and its material is a fixed composition: [2] = where is the tension of the pulling side, is the tension of the resisting side, is the static friction coefficient, which has no units, and is the angle, in radians, formed by the first and last spots the belt touches the pulley, with the vertex at the center of the pulley.

  6. Differential pulley - Wikipedia

    en.wikipedia.org/wiki/Differential_pulley

    Because there is a traveling pulley at the load, this doubles the mechanical advantage of the fixed (anchored) sprocket assembly, leading to a total mechanical advantage of 2 x P1/(P1-P2). For instance, a 1-ton differential chain fall might have a 15-pocket and a 14-pocket sprocket set.

  7. Wankel engine - Wikipedia

    en.wikipedia.org/wiki/Wankel_engine

    The C 111-II's engine was naturally aspirated, fitted with petrol direct injection, and had four rotors. The total displacement was 4.8 L (290 cubic inches), and the compression ration was 9.3:1 It provided a maximum torque of 433 N⋅m (44 kp⋅m) at 5,000 rpm and a produced a power output of 257 kW (350 PS) at 6,000 rpm. [53]

  8. Slider-crank linkage - Wikipedia

    en.wikipedia.org/wiki/Slider-crank_linkage

    A slider-crank linkage is a four-link mechanism with three revolute joints and one prismatic (sliding) joint. [1] The rotation of the crank drives the linear movement of the slider, or the expansion of gases against a sliding piston in a cylinder can drive the rotation of the crank. There are two types of slider-cranks: in-line and offset.

  9. Motor constants - Wikipedia

    en.wikipedia.org/wiki/Motor_constants

    Motor velocity constant, back EMF constant. is the motor velocity, or motor speed, [2] constant (not to be confused with kV, the symbol for kilovolt), measured in revolutions per minute (RPM) per volt or radians per volt second, rad/V·s: [3] The rating of a brushless motor is the ratio of the motor's unloaded rotational speed (measured in RPM ...