Gypsy Sailplane and Variants Production

(Also known as the Moore Gypsy) A cantilever shoulder-wing monoplane low cost lightweight Standard/Sports Class sailplane intended to be either a medium-performance 12m wing or a high performance 15m one could be fitted to a common fuselage. The shoulder mounted wings were of 12m span and constant chord with square tips, and of light alloy structure with polyurethane foam cores and 0.0124 in (0.3 mm) light alloy skins. Ailerons and flaps occupied the whole of the trailing edge. The Gypsy featured a constant chord V-tail, constructed in the same manner as the wing. Its fuselage behind the nose was an oval section metal monocoque with a long, smooth, bulged canopy over the single seat cockpit. The aircraft featured all-moving V-tail surfaces with anti-balance tabs, and there was a single, semi-protruding fixed mono wheel under the wing and a small tailwheel.
The BG-100/13.5 Gypsy was the BG-100/12 Gypsy rebuilt with a 13.5m span wing and an increased span tailplane of higher aspect ratio.

Birmingham Guild BG-100/12 Gypsy Specification
Span	Length	Height	Wing Area	Empty Wt	Max AUW
39 ft 4.5 in	19 ft 8 in	3 ft 11 in	90 sq ft	275 lb	605 lb
12 m	5.99 m	1.19 m	8.36 m2	125 kg	274 kg

Initial production version. As BG-100/12 but differed from the earlier versions chiefly in its wing construction, having the foam-stabilised thin skin of the BG-100s replaced by an aluminium alloy skinned D-box leading edge, based on the main spar, and with fabric covering between main and rear spars.

As BG-135 with minor fuselage and controls changes.

BG-135 re-engineered for simpler production and featuring a new 15m span wing. The original V-tailed SD3-15 redesignated SD3-15V upon the introduction of the SD3-15T, an SD3-15 with a T-tail and full span elevator.

Swales SD3-15T Specification
Span	Length	Height	Wing Area	Empty Wt	Max AUW
49 ft 2.5 in	20 ft	4 ft 3 in	102 sq ft	490 lb	728 lb
15 m	6.1 m	1.3 m	9.48 m2	222 kg	330 kg