[1] Two manually-controlled prototypes, were built as the GAF Pika (Project C[2]) as a proof of concept to test the aerodynamics, engine and radio control systems, serialled A92-1/2, 'B-1/2'.

As a result of the talks, Australia gained the contract for developing a target drone to Ministry of Supply specification E.7/48.

[5] The manually piloted prototype, known as the Pika, had side air intakes (to make room for the cockpit) and retractable undercarriage operated from a pneumatic reservoir.

[6] The remotely-piloted version, the Jindivik, followed the same basic form except that it had a single skid instead of an undercarriage and a dorsal air intake located where the Pika's cockpit was.

The Viper was also intended for a short lifespan – about 10 hours, but a "long life" version was also produced for conventional aircraft.

[8] The control systems were manufactured by various firms including Elliott Brothers, GEC and McMichael, with assistance from the Royal Aircraft Establishment.

Examples for use in the United Kingdom were shipped by surface transport, and assembled and tested by Fairey Aviation at Hayes, Middlesex, and Manchester Airport.