Marske XM-1

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XM-1
Marske XM-1 N5823N.jpg
The XM-1 in its original configuration with tip rudders
Role Glider
National origin United States
Designer Jim Marske
First flight1957
StatusSole example no longer on FAA registry
Number builtone

The Marske XM-1 was an American mid-wing, single-seat, experimental tailless glider that was designed and built by Jim Marske in 1957. [1] [2] [3] [4]

Contents

Experimentation with the XM-1 lead to the final configuration of the later Marske Pioneer. [1]

Design and development

The first of Marske's flying wings was the XM-1, a design inspired by the flying wing designs of Charles Fauvel and Al Backstrom. He built the XM-1 when he was 19 years old. The aircraft went through several versions, each a modification of the same basic airframe as Marske experimented with configurations. The aircraft started off with fins on the wing tips and was later converted to a single fin at the rear of the short fuselage in its "XM-1D" configuration. [1] [4]

The XM-1 was built with a welded steel tube fuselage covered in fiberglass. The 40 ft (12.2 m) wing was fabricated from wood and covered with doped aircraft fabric. The wing employed a 14% Fauvel airfoil. The landing gear was a fixed monowheel. [1]

Only one XM-1 was built. It was registered with the US Federal Aviation Administration in the Experimental - Amateur-built category. [1] [2]

Operational history

The XM-1 was described by Soaring Magazine as "easy to fly". The aircraft was stall and spin proof. Marske sold the aircraft and it went through a series of owners. The XM-1 was later removed from the FAA register and likely no longer exists. [1] [2]

Variants

The XM-1 in its "D" configuration with the single central fin and rudder Marske XM-1D N5823N.jpg
The XM-1 in its "D" configuration with the single central fin and rudder
XM-1-A
Initial configuration with wing tip fins and rudders. [1]
XM-1-B
with minor improvements over the XM-1-A
XM-1-C
Modified with a central fin only.
XM-1D
Final configuration with a central fin and rudder. [1]

Specifications (XM-1B)

Data from The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II [5]

General characteristics

Performance

See also

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References

  1. 1 2 3 4 5 6 7 8 Rogers, Bennett (August 1974). "1974 Sailplane Directory, Soaring Magazine". Soaring Magazine. Soaring Society of America: 96.
  2. 1 2 3 Federal Aviation Administration (August 2011). "Make / Model Inquiry Results" . Retrieved August 6, 2011.
  3. ↑ Marske, Jim (n.d.). "The Flying Wings of Jim Marske". Archived from the original on December 31, 2005. Retrieved March 20, 2011.
  4. 1 2 Marske, Jim (n.d.). "About Jim Marske". Archived from the original on November 27, 2010. Retrieved March 20, 2011.
  5. ↑ Shenstone, B.S.; K.G. Wilkinson (1963). The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde Volume II (in English, French, and German) (1st ed.). Zurich: Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue. pp. 226–227.
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