Martin M-1

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

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

Design and development

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

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)

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)

Performance

• 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

Aircraft of comparable role, configuration and era

• Matteson M-1 - glider with the same designation
  

Related lists

• List of gliders
  

References

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". http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=MARTIN&Modeltxt=M-1&PageNo=1. Retrieved 27 May 2011.