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Concept
Quadracycle
Summary
A quadracycle is a four-wheeled human-powered land vehicle. It is also referred to as a quadricycle, quadcycle, pedal car or four-wheeled bicycle amongst other terms.
Quadracycles have been in use since 1853 and have grown into several families of vehicles for a variety of purposes, including tourist rentals, pedal taxis, private touring, mountain and industrial use.
There is no consensus amongst manufacturers of four-wheeled, human-powered vehicles as to what this class of vehicles should be called, although quadracycle is the most commonly used term. Manufacturers who do refer to their products by class of vehicle call them:
Quadracycle - 11 manufacturers
Four-wheel bicycle - 7 manufacturers
Quadricycle - 5 manufacturers
Quadcycle - 3 manufacturers
Pedal car - 2 manufacturers
Quad - 2 manufacturers
In addition there are single manufacturers who call them Go-kart, Car, Car-Bike, Ecological car, Human Powered Vehicle, Pedal Kart, Quadribent, Quattrocycle, Surrey and Twin bike.
The earliest recorded pedal-powered quadracycle was exhibited in 1853 at the Exhibition of the Industry of All Nations world's fair held in New York City. This was about the same time that two-wheeled bicycles started to become popular. Quadracycles were one solution to the problem of low-speed stability in early cycles and were typically multi-seat models. Both tandem (in line) and sociable (side-by-side) seating configurations were used.
One early design that predated 1869 was the Andrews Quadracycle, built by Andrews of Dublin, Ireland. It was made from one inch-square iron and was propelled with foot levers that moved in a long horizontal ellipse. The Sawyer Quadricycle was introduced in 1855 and featured lighter construction, wooden wheels, iron tires and front-wheel steering via a tiller. Like the Andrews Quadracycle it was moved by foot levers driving the rear axle. Starley's Coventry Rotary Quadracycle was introduced in 1885 and used conventional bicycle-style rotary pedals instead of foot levers for drive.
Official source
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