The Skylark is high-wing with a forward engine mounted on a cantilever beam fuselage. The forward-swept wing is rectangular with a tapered trapezoidal tip, and is supported by a single strut. Tail surfaces are classic, and tricycle landing gear is used. The engine and propeller are well forward of the cockpit. The forward-swept wing and under-wing cockpit location produce good visibility; pilot weight has minimal effect on the aircraft’s center of gravity; and the ideal spanwise lift distribution inhibits stalling of the wingtips, ensures against spinning and signals approaching stall by buffeting of the tail surfaces. Two people can easily disassemble the Skylark. By removing three bolts, the horizontal tail surfaces can be folded up against the fin. Each wing can be detached by removing only four bolts. The Skylark wing profile was designed by NASA using technology specially for use in slow-flying aircraft. Features in¬clude low drag in the range of useful air¬speeds, low stall speed, and mild stall characteristics (which are fully exploited by the forward-swept wing to produce a “spinproof” design). Aluminium sheet, extruded tubes and angles, all of general-aviation proven 2024 alloy are used throughout. Airtech uses modern adhesive bonding technology, along with blind and solid rivets. High-strength PVC foam, stamped aluminum ribs, silky-smooth Teflon bellcrank bearings, aluminum pushrods with spherical couplings, “Ceconite 7600 Process” aircraft fabric, precision molded fiberglass fairings, molded plexiglas windscreen all combine to satisfy the most demanding aviators. The standard airspeed indicator, altimeter, tachometer and toe-operated disk brakes are as comforting to the pilot as the contoured seat designed for those up to 6 feet, 6 inches, with “stick-and-rudder” controls. The Skylark uses the Konig SD-570 four-cylinder radial. Using a 2.8:1 reduction drive, the Skylark’s engine turns its 72-inch propeller at only 1500 rpm during takeoff; the result is exceptional static thrust and the virtual elimination of propeller noise.

Engine: Koenig SD-570 4-cyl radial two-stroke
Reduction: 2.8:1
Prop: 72 in

The Air Sports AIRector 120 is a German ultralight aircraft, designed and produced by Air Sports Aircraft of Dassel. It was introduced at the Aero show held in Friedrichshafen in 2010.

Terry Toetze, a graduate of Southern Illinois University with a degree in Industrial Technology, worked on the plans, sketches and designs from John C. Massey and the two created the first Sunburst. The first model was a learning platform and needed a few changes and a second machine turned out to be the prototype for the production model.

Airmass Sunburst Article

The single seater Sunburst stick operates differentially, working spoilers to control the roll and, together with the rudder bar through a mixer, operating the elevons of the inverted V tail as elevators or rudders. The nosewheel of the tricycle undercar¬riage on the Sunburst is steered by the rudder bar. The Cuyuna 430RR twin cylinder in line engine of 429 cc, drives a pusher propeller through a reduction gear and has dual ignition. It is situated under the wing, in line with the centre of gravity, over the pilot’s head. John Massey of Airmass flew one of these machines in the 1982 London Paris, finishing in 18th place.

Supplied in kit form, the Sunburst is estimated by Airmass Incorporated to require around 30 h for completion.
Single seat single engined high wing mono¬plane with conventional three axis control. Wing has unswept leading and trailing edges, and constant chord; inverted V tail. Pitch/yaw control by elevon; roll control by one third¬ span spoilers; control inputs through stick for pitch/roll and pedals for yaw. Wing braced from above by kingpost and cables, from below by cables; wing profile; 90% double surface. Undercarriage has three wheels in tricycle formation; bungee suspen¬sion on nosewheel and glass fibre suspension on main wheels. Push right go right nose¬wheel steering connected to yaw control. Optional brake. Aluminium tube framework with optional pod. Engine mounted below wing driving pusher propeller. Tubing from blue anodized 6061T6 aluminium, rigging is stainless steel with vinyl coating, wing cover¬ing is Dacron.
First year built: 1980. Units delivered to June 1981: 6. Price 1982: $4,645 (with engine) Includes ASI, altimeter, 30-hp engine with reduction drive.

Engine: Cuyuna 430RR, 30 hp
Static thrust, 170 lb
Wingspan: 36 ft
Wing area: 156 sq.ft
Aspect ratio: 8.3
Overall length: 16ft
Empty weight: 185lb
Usable payload (include fuel), 240 lb
Max pilot weight: 240 lb
Wing loading, 2.5 lb
L/D power-off glide ratio, 12:1
Cruise speed (85% power), 50 mph
Stall speed, 23 mph
Approach speed, 30 mph
Flair speed, 25 mph
Liftoff speed, 28 mph
Takeoff roll distance, 75 ft
Rate of climb, 600 fpm
Fuel capacity, 5 gal
Range at cruise, 100 mi