Photograph of the Learjet 23 prototype undergoing a fuselage side-bending test, February 25, 1964. Text on sign: "Fuselage side bending static test / 67% ultimate / 25 Feb. 2964."Inscription on verso: "Gene Koenig / middle white shirt / T-58-4E /…
Photograph of the Learjet 23 prototype undergoing a fuselage side-bending test, February 25, 1964. Text on sign: "Fuselage side bending static test / 0% ultimate / 25 Feb. 2964."Inscription on verso: "T-58-4C / 2-25-64."
Photograph of the Learjet 23 prototype undergoing a fuselage side-bending test, February 25, 1964.Text on sign: "Fuselage side bending static test / 0% ultimate / 25 Feb. 1964."Inscription on verso: "T58-4A / 2-25-64."
Photograph of Hank Beaird and Dave Brown seated in the cockpit of a Learjet 23 aircraft (tail number N801L), February 28, 1964.
Inscription: "PR-113[C or G?] / 2-28-64."
Inscription on verso: "N801L / Hank Beaird / Dave Brown (AV Week) / 2/28/64."
Photograph of the test fuselage of the Learjet 23 prototype at a Lear facility, February 29, 1964.Inscription on verso: "Overall shot of test fuselage / 2-29-64."
Photographic contact sheet containing three images related to first flight preparations of the Learjet 23 aircraft (tail number N802L), March 1964. Images 1 and 2 (left and top right) show a man fueling up the aircraft. Image 3 (bottom right) shows a…
Photographic contact sheet containing four images of people with a Learjet 23 aircraft, March 5, 1964. The first image (top left) shows men looking at a Learjet wing outfitted with testing tufts. The second image (top right) shows men inside the…
Photograph of three men conducting tests on the Learjet 23 prototype, March 16, 1964.Inscription on verso: "Flight test instruction for ground test / T-76-3A / 3-16-64."
Photograph of the test fuselage of the Learjet 23 prototype undergoing structure testing at a Lear facility, March 17, 1964.Inscription: "T76-1B / 3-17-64."Inscription on verso: "Structure testing."
Photographic contact sheet containing three images of a Lear Jet Stereo 8 player installed in William P. Lear's station wagon, March 18, 1964. Two of the images show a man seated in the driver's seat.
Inscription: "IND-36A / IND-36B / IND-36C /…