The Rand Robinson KR-1
is a single-seat, single-engine sport aircraft designed in the United States in the early 1970s and marketed for homebuilding. It is a low-wing cantilever monoplane of conventional design with an enclosed cockpit and tailwheel undercarriage. As originally designed, the main undercarriage units of the Rand Robinson KR-1 were manually retractable, folding backwards into the wings. However, some builders choose fixed tailwheel or even fixed tricycle undercarriage for KR-1.
The KR-1’s wings have a two-spar construction; the front spar of spruce, and the rear spar from spruce and plywood. The wing ribs are formed from polyurethane foam, and the space around them filled with the same material before the entire wing structure is covered with fabric impregnated with epoxy resin. The wings are removable outboard the landing gear. Similar construction is used in the empennage and control surfaces.
The fuselage is built around a wooden framework, the lower part skinned in plywood and the upper part built up of polystyrene foam covered in epoxy-coated fabric. KR-1 builders have the choice of three different upper fuselage configurations: the “fastback” with a turtledeck behind the cockpit, the “pursuit” with a fighter-style bubble canopy, and the “sportsman” with an open cockpit and a small fairing behind it for rollover protection.
The design has proved popular, in 2010 that over 2,000 KRs were flying, worldwide.
Rand Robinson KR-1- Construction manual.pdf
Rand Robinson KR-1 Cutaway Drawing.pdf
Specifications Rand Robinson KR-1
- Length 12′ 9″
- Wing Span 17′ 0″
- Total Wing Area 62 sq. ft.
- Empty weight 375 lbs.
- Gross weight 750 lbs.
- Useful load 375 lbs.
- Baggage capacity 20 lbs. max
- Take off distance 350 ft.
- Landing distance 900 ft.
- Stall Speed 52 mph
- Maximum Speed 200 mph
- Cruise Speed 180 mph
- Range 1400 miles
- Rate of Climb (light) 1200 fpm
- Rate of Climb (gross) 800 fpm
- Service ceiling 15,000 ft.
- Engine VW 1834
- Fuel 8-30 gal.
- Fuel consumption 3.8 gph
- Landing gear Fixed conventional or trigear, or retractable conventional.
