Rans S 4 Coyote

Design and development

The Coyote single seat was designed by Randy Schlitter in 1982, as a result of his dissatisfaction with existing ultralight designs at the time. Construction of the first S-2 Coyote prototype was started in November 1982, with the first flight following in March 1983. Originally the design was to be manufactured by a new company Aero-Max, which was a partnership between Schlitter and a friend of his. The partnership failed over financial issues and kit manufacturing was passed to Schlitter's company, Rans, which was at that time building sailtrikes.

Both models of the family feature a welded 4130 steel tube cockpit, with a bolted aluminum tube rear fuselage, wing and tail surfaces all covered in pre-sewn Dacron envelopes, which shorten construction time. The reported construction time is 211 man-hours.

The Coyote S-4 has conventional landing gear, while the S-5 has tricycle gear. Both can be equipped with floats and skis. The original basic engine was the Rotax 277 of 28 hp (21 kW), with the Rotax 447 of 40 hp (30 kW) and the Rotax 503 of 50 hp (37 kW) available later as options.

The Coyote II two-seater was later developed from the S-5.

Operational history

There were 246 S-4s and S-5s built and flown by December 1998.

Many S-4s are flown as unregistered ultralights in the US, but in November 2010 there were four registered along with four S-5s. In November 2010 there were four S-4s and one S-5 registered in Canada. In December 2010 there were nine S-4s and three S-5s registered in the United Kingdom.

Variants

S-2

Prototype first flown in March 1983

S-3

Improved prototype flown in September 1983, entered production as the S-4

S-4

Conventional landing gear version intended as a FAR 103 Ultralight Vehicles compliant design when equipped with the standard 28 hp (21 kW) Rotax 277 engine. No longer in production.

S-5

Tricycle landing gear version for the US Experimental amateur-built category with options such as brakes. Engines include Rotax 447 of 40 hp (30 kW) and the Rotax 503 of 50 hp (37 kW). No longer in production.

Specifications (S-5)

Data from Kitplanes and Aerocrafter

General characteristics

Crew: One

Length: 17 ft 0 in (5.18 m)

Wingspan: 29 ft 6 in (8.99 m)

Wing area: 127 sq ft (11.8 m²)

Empty weight: 325 lb (147 kg)

Gross weight: 587 lb (266 kg)

Fuel capacity: 9 US gallons (34 litres)

Powerplant: 1 × Rotax 503 , 50 hp (37 kW)

Propellers: 2-bladed wooden

Performance

Maximum speed: 95 mph (153 km/h; 83 kn)

Cruise speed: 70 mph (113 km/h; 61 kn)

Stall speed: 27 mph (43 km/h; 23 kn)

Range: 181 mi; 291 km (157 nmi)

Service ceiling: 13,000 ft (4,000 m)

Rate of climb: 800 ft/min (4.1 m/s)

Avionics

none