[1] Evans had formerly worked at Convair, Ryan Aircraft and General Dynamics.

The design was successful, and, following a first flight in September 1968, a large number of aircraft have been constructed by homebuilders.

[3] The VP-1 is a single-seat open-cockpit low-wing monoplane manufactured from spruce and plywood with fabric covered wings.

[2] Following the success of the VP-1 a two-seat variant, the VP-2 was designed to meet normal category limits, which are 3.8 positive and 1.9 negative g. The first VP-2 (then known as VP II) flew in 1971.

[4] The VP-2 is externally similar in appearance to the VP-1 but with a 1 ft (30 cm) wider fuselage and enlarged cockpit section to accommodate two side-by-side configuration seats.