- Marske XM-1
-
XM-1 
The XM-1 in its original configuration with tip rudders Role Glider National origin United States Designer Jim Marske Introduction 1957 Status Sole example no longer on FAA registry Number built one The Marske XM-1 was an American mid-wing, single-seat, experimental flying wing glider that was designed and built by Jim Marske in 1957.[1][2][3][4]
Experimentation with the XM-1 lead to the final configuration of the later Marske Pioneer.[1]
Contents
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 though 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 though 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
- XM-1
- Initial configuration with wing tip fins and rudders.[1]
- XM-1D
- Final configuration with a central fin and rudder.[1]
Specifications (XM-1D)
Data from Soaring[1]
General characteristics
- Crew: one
- Wingspan: 40 ft 0 in (12.19 m)
- Wing area: 170 sq ft (16 m2)
- Aspect ratio: 9.5
- Airfoil: 14% Fauvel
- Empty weight: 350 lb (159 kg)
- Gross weight: 550 lb (249 kg)
Performance
- Maximum glide ratio: 28:1 at 58 mph (93 km/h)
- Rate of sink: 144 ft/min (0.73 m/s) at 42 mph (68 km/h)
- Wing loading: 3.2 lb/sq ft (16 kg/m²)
See also
- Related lists
References
- ^ a b c d e f g h i Rogers, Bennett: 1974 Sailplane Directory, Soaring Magazine, page 96. Soaring Society of America, August 1974. USPS 499-920
- ^ a b c Federal Aviation Administration (August 2011). "Make / Model Inquiry Results". http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=MARSKE&Modeltxt=&PageNo=1. Retrieved 6 August 2011.
- ^ Marske, Jim (undated). "The Flying Wings of Jim Marske". http://www.marskeaircraft.com/flyingwings.html. Retrieved 20 March 2011.
- ^ a b Marske, Jim (undated). "About Jim Marske". http://www.marskeaircraft.com/aboutus.html. Retrieved 20 March 2011.
External links
Marske Aircraft Aircraft People Jim MarskeLists relating to aviation General Aircraft (manufacturers) · Aircraft engines (manufacturers) · Airlines (defunct) · Airports · Civil authorities · Museums · Registration prefixes · Rotorcraft (manufacturers) · TimelineMilitary Accidents/incidents Records Categories:- United States sailplanes 1950–1959
- Marske aircraft
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