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. A two-seat version is marketed as the KR-2. 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 KR-1 and basic KR-2 were manually retractable, folding backwards into the wings, while the KR-2T tandem-seat version had fixed undercarriage. However, some builders choose fixed tailwheel or even fixed tricycle undercarriage for KR-1s and KR-2s.