Rotor

Some rotor machines were designed with a different number of pins on each rotor, with the number of pins on any one rotor either prime, or coprime to the number of pins on any other rotor.

The tail rotor is driven from the main transmission, via the two directional gearboxes which provide a tail rotor speed approximately six times that of the main rotor to increase tail rotor effectiveness.

Applications Automobile racing Mazda 787B In the racing world, Mazda has had substantial success with two-rotor, three-rotor, and four-rotor cars.

Department of National Defence The UH-1H's dynamic components include the engine, transmission, rotor mast, main rotor blades, tail rotor driveshaft, and the 42-degree and 90-degree gearboxes.

For a single-notch rotor in the right-hand position, the middle rotor stepped once for every 26 steps of the right-hand rotor.

Here, the middle rotor (2) is engaged because the notch in the first rotor is aligned with the pawl; it will step (turn over) with the first rotor.

In other cases, the centre of gravity of the rotor may be offset from the axis of oscillation, and, thus, the centre of gravity of the rotor and the centre of suspension of the rotor may not coincide.

Motorsport seeAlso In the racing world, Mazda has had substantial success with both its signature Wankel-engine cars (in two-rotor, three-rotor, and four-rotor forms) as well as its piston-engine models.

Rotor two also pushes rotor one forward after 26 steps, but since rotor one moves forward with every keystroke anyway, there is no double-stepping. citation This double-stepping caused the rotors to deviate from odometer -style regular motion.

SPARCS in the United Kingdom found that idle stability and economy was obtained by supplying an ignitable mix to only one rotor in a multi rotor engine in a forced-air cooled rotor, similar to the Norton designs.

Using two rotors means that a smaller rotor with slower-moving rotor tips can be used, compared to a single-rotor design.

With the exception of models A and B, the last rotor came before a 'reflector' (German: Umkehrwalze, meaning 'reversal rotor'), a patented feature unique to Enigma among the period's various rotor machines.

Also, the coaxial main rotor configuration does not require tail rotor, which can improve survivability.

As the rotor moves the fuel charge, the second two fire a fraction of second behind the first pair of plugs igniting near the rear of the rotor at the back of the fuel charge.

As the rotor orbits, the vanes trap fluid between the rotor and the casing, drawing the fluid through the pump.

As this ring rotated with its rotor, a notch machined into it would eventually align itself with the pawl, allowing it to engage with the ratchet, and advance the rotor on its left.

During normal operation, rotor imbalance can lead to vibration, which, because of the high rotation velocities, could lead to a blade breaking away from the rotor and through the casing.

Each rotor contained a notch (or more than one) that controlled rotor stepping.

For a two-notch rotor, the rotor to its left would turn over twice for each rotation.

For engines with more than two rotors, the approach of coupling two bi-rotor sets by a serrate coupling between the two rotor sets has been tested successfully.