[2] The Capstan flew ten years later with double curvature parts of the fuselage skin produced from glass-reinforced plastic (G.R.P).

[5] It was a semi-monocoque spruce structure, plywood covered apart from the G.R.P in the cockpit area, with the single piece canopy hinged on the starboard side.

[4] The rudder and the rear part of the tailplane were fabric covered, the latter carrying trim tabs.

On early aircraft the undercarriage was a non-retractable single wheel placed under the leading edge of the wing, plus a short skid under the nose and a tail bumper.

[6] Four were entered into the National Gliding Competition in May 1964, but failed to impress in the light conditions of the first few days.

Since the 1965 World Championships were also scheduled for the UK, Slingsby decided to increase the wing area by stretching the span to 17 m, making the Dart an entrant for the Open Class.

[7] The later Dart 15s used a similar metal and wood spar and had the root fillet, producing a net weight saving of 45 lb (21 kg) and a corresponding improvement in sink rate.

[4] After the competition, in which they were not highly placed,[12] their wings were extended to 17 m and they were redesignated Dart 17W; later fitted with the retractable undercarriage, they became 17WRs.