The aircraft was designed to comply with the Fédération Aéronautique Internationale microlight rules and US light-sport aircraft rules. It features a strut-braced high-wing, a two-seats-in-side-by-side configuration enclosed cockpit accessed via doors, fixed tricycle landing gear and a single engine in tractor configuration.^[1][2]

The aircraft is made from sheet aluminum. Its 8.20 m (26.9 ft) span wing has an area of 11.4 m² (123 sq ft) leading edge slots and flaps. The wing is supported by V-struts with jury struts. The standard engine available is the 80 hp (60 kW) Rotax 912UL four-stroke powerplant. The S-STOL can be de-rigged for storage and folding wings are a factory option. The aircraft can be fitted with wheels, skis and floats and can be used to tow gliders and hang gliders.^[1][2]

Reviewer Marino Boric described the design in a 2015 review saying, "high reliability, robustness and real short-field ability make it a good-natured aircraft with forgiving characteristics both in the air and on the ground, where its robust undercarriage, high ground clearance and tundra tires help it cope with the roughest strips."^[2]

Data from Bayerl and Roland Aircraft^[1][3]

General characteristics

• Crew: one
• Capacity: one passenger
• Length: 6.10 m (20 ft 0 in)
• Wingspan: 8.20 m (26 ft 11 in)
• Wing area: 11.4 m² (123 sq ft)
• Empty weight: 275 kg (606 lb)
• Gross weight: 530 kg (1,168 lb)
• Fuel capacity: 90 litres (20 imp gal; 24 US gal) in two wing tanks
• Powerplant: 1 × Rotax 912UL four cylinder, liquid and air-cooled, four stroke aircraft engine, 60 kW (80 hp)

Performance

• Maximum speed: 180 km/h (110 mph, 97 kn)
• Cruise speed: 140 km/h (87 mph, 76 kn)
• Stall speed: 58 km/h (36 mph, 31 kn)
• Service ceiling: 4,600 m (15,000 ft)
• g limits: +6/-3
• Rate of climb: 6.5 m/s (1,280 ft/min)
• Wing loading: 46.5 kg/m² (9.5 lb/sq ft)

• Zenith STOL CH 701

• Official website