Following the introduction in the United Sates of US FAR 103 regulations for Ultralight Vehicles, a number of companies produced ultra-light aircraft to the market which complied with these regulations, one of these being the Pitbull gyrocopter.

The Kallithea is a high-performance sporting gyrocopter produced by Niki Rotor Aviation at Pravets in Bulgaria, the company specialising in the design, development and manufacture of autogyros and makes them available to interested parties in kit form for construction by amateur builders. It has developed and marketed a number of

Autogyros Aviacion of Madrid, Spain, has for some years been designing and developing light autogyros for the light sport aircraft market.

The Cavalon is a development of the Calidus by the manufacturer of this series of machines, AutoGyro GmbH of Hildesheim in Germany, and before that the MT-03 series, featuring two-seats and having fully adjustable seating, controls and a large fuel capacity to give good range.

Australian Autogiro was founded by Edward Minty of Turramurra, NSW and he built a series of gyrocopters which were supplied to purchasers in either kit form or as a complete aircraft.

The Calidus is a development of the company’s MT-03 gyrocopter and basically differs in having a fully enclosed cockpit but is similar in configuration.

The Amax Eagle was produced by Amax Engineering of Donvale Victoria and was made available to amateur builders in kit form in the 1990s. It was produced in two basic models, a single-seater known as the Eagle and a two-seater known as the Double Eagle.