LK-10A Laister-Kauffmann   

General Details
Manufacturer: Laister-Kauffmann
Plane Name:


Classified as: Unclassified
Country Of Origin: U S A
Designer: Jack Laister
No. of Seats 2
No. Built 156
L/DMax: 22 89 kph / 45 kt / 55 mph
MinSink: 0.98 m/s / 3.2 fps / 1.90 kt


Span Area Empty Weight Payload Gross Weight Wing Load Water Ballast
m ft sq.m sq.ft kg lb. kg lb. kg lb. kg
kg lb.
15.2 50 13.33 165 215 475 181 400 396 875 29.7 5.27 0 0
Aspect ratio: 15.1
Airfoil: NACA 4418, 4409
Structure: wood/ fabric wing and tail; steel-tube/ fabric fuselage.

In 1938 Laister completed a sleek gull-wing sailplane, which was referred to as the Lawrence Tech Sailplane after its sponsor. Repainted red, white and blue and renamed the ‘Yankee Doodle’ it competed in a 1939 aerobatic competition at the Paris airshow. With the need for military trainers on the outbreak of World War II, Laister designed the two-place Yankee Doodle 2 from the original with straight wings and automatic control hook-ups. Under the sponsorship of John Kauffmann, a St. Louis businessman, simplified versions were produced in quantity as TG-4A’s for the USAAC in 1942-43. A flat-top Version with increased performance also has an ATC. A ‘bunnynose’ LK, flown by Harold Hutchinson, held the national multiplace goal record of 399 km/ 248 miles from 1956 to 1967. The Vintage Sailplane Association has copies of the military manuals, color scheme drawings and paint chips available. One LK-10A belongs to the National Soaring Museum. ATC


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