Frost's later ideas revolved around a disk or saucer shape – a "flying saucer" and resulted in a number of patents in Great Britain, the United States and Canada on the unique concepts of propulsion, control and stabilisation systems that were incorporated.
Frost continued to lobby for the project now called the "Y-2" and achieved a remarkable breakthrough by demonstrating the project to the United States Air Force.
With funding from the Americans, Frost was able to proceed with his research.
From 1955 to 1959, the design team concentrated on the new VTOL supersonic studies known as Weapon Systems 606A which Avro Canada continued to support through an associated private venture program, the PV-704 which resulted in the construction of an engine test rig in 1957.

The PV-704 supersonic test model, powered by six Armstrong-Siddeley Viper jet engines driving a central rotor, was built and housed inside a small, brick testing rig.
The test model was abandoned in favour of a simpler flying model led to the only design that materialised from the Avro Special Project Group, a "proof-of-concept" vehicle, the VZ-9-AV "Avrocar".
Two Avrocar prototypes were constructed and completed a series of wind tunnel tests at NASA Ames in California and a 75-hour flying program at the Malton home of Avro Canada.
The results of the testing revealed a stability problem and degraded performance due to turbo-rotor tolerances.
Before modifications could be achieved, funding ran out with the final flight test program completed in March 1961.

As the result of his work in vertical takeoff systems, John Frost was invited to become a fellow of the Canadian Aeronautics and Space Institute after he presented the W. Rupert Turnbull seventh lecture on 25 May 1961.
The citation noted that Frost had discovered and patented the air cushion effect that had been evident in his work on flying saucers and that U.S. Patent #3124323 "Aircraft Propulsion and Control" was one of a series of US, Canadian and British patents to become known as the "Frost patents."
Frost's later ideas revolved around a disk or saucer shape – a "flying saucer" and resulted in a number of patents in Great Britain, the United States and Canada on the unique concepts of propulsion, control and stabilisation systems that were incorporated. Frost continued to lobby for the project now called the "Y-2" and achieved a remarkable breakthrough by demonstrating the project to the United States Air Force. With funding from the Americans, Frost was able to proceed with his research. From 1955 to 1959, the design team concentrated on the new VTOL supersonic studies known as Weapon Systems 606A which Avro Canada continued to support through an associated private venture program, the PV-704 which resulted in the construction of an engine test rig in 1957.
The PV-704 supersonic test model, powered by six Armstrong-Siddeley Viper jet engines driving a central rotor, was built and housed inside a small, brick testing rig. The test model was abandoned in favour of a simpler flying model led to the only design that materialised from the Avro Special Project Group, a "proof-of-concept" vehicle, the VZ-9-AV "Avrocar". Two Avrocar prototypes were constructed and completed a series of wind tunnel tests at NASA Ames in California and a 75-hour flying program at the Malton home of Avro Canada. The results of the testing revealed a stability problem and degraded performance due to turbo-rotor tolerances. Before modifications could be achieved, funding ran out with the final flight test program completed in March 1961.
As the result of his work in vertical takeoff systems, John Frost was invited to become a fellow of the Canadian Aeronautics and Space Institute after he presented the W. Rupert Turnbull seventh lecture on 25 May 1961. The citation noted that Frost had discovered and patented the air cushion effect that had been evident in his work on flying saucers and that U.S. Patent #3124323 "Aircraft Propulsion and Control" was one of a series of US, Canadian and British patents to become known as the "Frost patents."
John Carver Meadows Frost