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The earliest record of a pedalo is perhaps Leonardo da Vinci's diagram of a craft driven by two pedals. [1] [2] Typically, a two-seat pedalo has two sets of pedals side-by-side, designed to be used together. Some models, however, have three pedals on each side, to allow a person boating alone to pedal from a centrally seated position.
Electronic Gear-Shifting System: not simply a type of shifter or a type of derailleur, a complete system with switches instead of levers, wires instead of Bowden cables, and motor-driven derailleurs that must all work together; Fairing: a full or partial covering for a bicycle to reduce aerodynamic drag or to protect the rider from the elements
Figure 1. Diagram of piezo inchworm motor in action. Figure 2. Six-step actuation process of the piezo inchworm motor. In its simplest form, the inchworm motor uses three piezo-actuators (2 and 3, see Figure 1.) mounted inside a tube (1) and electrified in sequence to grip a shaft (4) which is then moved in a linear direction.
Shaft drives operate at a very consistent rate of efficiency and performance, without adjustments or maintenance, though their efficiency has been lower than that of a properly adjusted and lubricated chain, [9] [10] possibly because of insufficiently precise machining or alignment of the bevel gears.
Insides of a slip-stick piezoelectric motor. Two piezoelectric crystals are visible that provide the mechanical torque. [1]A piezoelectric motor or piezo motor is a type of electric motor based on the change in shape of a piezoelectric material when an electric field is applied, as a consequence of the converse piezoelectric effect.
The switched reluctance motor (SRM) is a type of reluctance motor. Unlike brushed DC motors , power is delivered to windings in the stator (case) rather than the rotor . This simplifies mechanical design because power does not have to be delivered to the moving rotor, which eliminates the need for a commutator .
A motorized bicycle is a bicycle with an motor or engine and transmission used either to power the vehicle unassisted, or to assist with pedalling. Since it sometimes retains both pedals and a discrete connected drive for rider-powered propulsion, the motorized bicycle is in technical terms a true bicycle, albeit a power-assisted one.
1903 – A California motorized bicycle ridden by George Wyman became the first motor vehicle to cross the North American continent. [10]1903 – 1962 The "Shaw Manufacturing Co." of Galesburg, Kansas advertises a 241cc chain-drive engine kit (1903–1915) for motorizing a bicycle in "Popular Mechanics" magazine for $90.