The A-11, which first flew in prototype form on 12 May 1958, is a high-performance single-seater which of all-metal construction. The steamlined forward fuselage, housing the pilot under a blown plastic canopy, tapers to a slim boom carrying the cantilever butterfly tail, with an included angle of 90 degrees between the tail surfaces.
The A-11 is aerobatic and suitable for both spinning and cloud flying, and the mid-set wing has a single spar in the root and two spars in the outer wings. The leading edge is metal-covered, with fabric covering aft of the main spar. The fabric covered slotted ailerons can be drooped through 8 degrees to supplement the slotted flaps, and there are also lift spoilers on the wing upper surfaces. The monocoque fuselage has a retractable sprung monowheel and a rubber-mounted tailskid.
Altogether about 350 examples of the A-11 and A-13 were built.
Span: 54 ft 1.5 in
Length: 19 ft 8.5 in
Wing area: 130.8 sq.ft
Aspect ratio: 22.4
Empty weight: 648 lb
Max take-off weight: 882 1b
Max speed: 217 mph (in smooth air)
Max aero-tow speed: 124 mph
Min sinking speed: 2.43 ft/sec at 53.5 mph
Best glide ratio: 32:1 at 60 mph