Rand Robinson KR-1

Last updated
KR-1 and KR-2
Chris Gardiner's 1999 Rand KR-2S C-GKRZ photo 1.JPG
KR-2S
Role Homebuilt
National originUnited States
Manufacturer nVAero
DesignerKenneth Rand
First flightFebruary 1972
StatusIn production (2022)
A KR-2S showing the small size of the aircraft and the low frontal profile Chris Gardiner's 1999 Rand KR-2S C-GKRZ photo 2.JPG
A KR-2S showing the small size of the aircraft and the low frontal profile

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. [1] [2] [3] A two-seat version is marketed as the KR-2. [1] [2] [3] It is a low-wing cantilever monoplane of conventional design with an enclosed cockpit and tailwheel undercarriage. [3] [4] As originally designed, the main undercarriage units of the KR-1 and basic KR-2 were manually retractable, folding backwards into the wings, [1] while the KR-2T tandem-seat version had fixed tricycle undercarriage. [5] However, some builders choose fixed tailwheel or even fixed tricycle undercarriage for KR-1s and KR-2s. [1] [6]

Contents

Kits for the KR-1, KR-2 and KR-2S are supplied by nVAero of Mission Viejo, California/Corona, California, United States. [1] [7] [8]

Design and development

The KR-1's wings have a two-spar construction; the front spar of spruce, and the rear spar from spruce and plywood. [1] [4] The wing ribs are formed from polyurethane foam, [1] and the space around them filled with the same material before the entire wing structure is covered with fabric impregnated with epoxy resin. [4] Similar construction is used in the KR-2, with an RAF 48 airfoil cross-section (some later models have adapted the AS 5046 airfoil, for increased speed at the expense of poorer low-speed handling [1] ), and the wings are removable outboard the landing gear. [1] Similar construction is used in the empennage and control surfaces. [1]

The fuselage is built around a wooden framework, [1] the lower part skinned in plywood and the upper part built up of polystyrene foam covered in epoxy-coated fabric. [4] 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. [9]

The design has proved popular, with over 10,000 sets of plans sold, [1] including 6,000 sets of KR-1 plans and 4,500 sets of KR-2 plans sold by 1979. [2] From these, over 200 KR-1s [4] and 350 KR-2s [10] were flying by 1987. nVAero's founder Steve Glover reported in 2010 that over 2,000 KRs were flying, worldwide. [1]

Plans and kits were still available in 2022. [11]

Variants

Rand Robinson KR-1 on display RandRobinson-KR1.jpg
Rand Robinson KR-1 on display

Aircraft on display

Specifications (KR-2)

Data from nVAero [16]

General characteristics

Performance

Notes

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Grimstead, Bob "Flight Review: The Rand KR-2", September 13, 2010, Kitplanes, retrieved November 13, 2020
  2. 1 2 3 Taylor 1989, p.757
  3. 1 2 3 Markowski 1979, p.286
  4. 1 2 3 4 5 Jane's All the World's Aircraft 1987–88, p.696
  5. Jane's All the World's Aircraft 1987–88, p.696–97
  6. Cox 1995, p.22
  7. 1 2 3 Vandermeullen, Richard: 2012 Kit Aircraft Buyer's Guide, Kitplanes, Volume 28, Number 12, December 2011, page 63. Belvoir Publications. ISSN 0891-1851
  8. Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 120. Flying Pages Europe SARL, 2015. ISSN   1368-485X
  9. Markowski 1979, p.288
  10. Jane's All the World's Aircraft 1987–88, p.697
  11. "Welcome to nV|Aero! The Exclusive Manufacturer of the KR Series Aircraft". nv-aero.com.
  12. Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 113. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  13. "Rand Robinson KR-1 - N1436"
  14. Queensland Air Museum (23 August 2013). "Rand Robinson KR-2 VH-XXS The Beast C/N Q082" . Retrieved 22 September 2013.
  15. Wings Over the Rockies Air and Space Museum. "Aircraft Exhibits". wingsmuseum.org. Archived from the original on 23 October 2018. Retrieved 7 May 2019.
  16. nVAero (2021). "KR-2 Aircraft". nvaero.com. Archived from the original on 23 June 2021. Retrieved 30 May 2022.

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