The Martin M-1 was an American gull winged, single-seat glider that was designed and built by Volmer Jensen in 1939.[1][2]

Role Glider
National origin United States
Designer Volmer Jensen
First flight 1939
Status Production completed
Primary user Jim Martin
Produced 1939
Number built 1

Design and development edit

Jim Martin contracted Jensen to design and built him a glider for contest flying just before the Second World War. Jensen completed the aircraft in 1939.[1]

The aircraft was constructed with a wooden structure and covered in doped aircraft fabric covering. The cantilever gull-style wing employed a NACA 4400 series airfoil. The tail was a conventional low-tail design and featured strut-bracing. The M-1 was registered as an Experimental - Amateur-built aircraft and was not type certified.[1][2]

Operational history edit

Martin flew the aircraft in a number of US Nationals, as did a later owner of the M-1, Emil Lehecka. While Lehecka owned it the aircraft picked up the nickname of the Whatsit. By the 1970s the aircraft was owned by Francis Kalinowsky and was based at the Circle X airport in Florida. At that time it was reportedly in good repair and was well maintained.[1]

The aircraft was removed from the Federal Aviation Administration registry and its whereabouts are unknown.[2]

Specifications (M-1) edit

Data from Soaring[1]

General characteristics

  • Crew: one
  • Wingspan: 48 ft 0 in (14.63 m)
  • Wing area: 180 sq ft (17 m2)
  • Aspect ratio: 12.8:1
  • Airfoil: NACA 4400 series
  • Empty weight: 438 lb (199 kg)
  • Gross weight: 631 lb (286 kg)


  • Maximum glide ratio: 28 at 50 mph (80 km/h)
  • Rate of sink: 132 ft/min (0.67 m/s) at 40 mph (64 km/h)

See also edit

Aircraft of comparable role, configuration, and era

Related lists

References edit

  1. ^ a b c d e Said, Bob: 1983 Sailplane Directory, Soaring Magazine, page 48. Soaring Society of America November 1983. USPS 499-920
  2. ^ a b c Federal Aviation Administration (May 2011). "Make / Model Inquiry Results". Retrieved May 27, 2011.