West German
West Germany was the common English name for the Federal Republic of Germany (FRG) from its formation on 23 May 1949 until its reunification with East Germany on 3 October 1990. It is sometimes known as the Bonn Republic after its capital c ...
high-wing
A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple wings.
A monoplane has inherently the highest efficiency and lowest drag of any wing config ...
, single-seat
motor glider
A motor glider is a fixed-wing aircraft that can be flown with or without engine power. The FAI Gliding Commission Sporting Code definition is: a fixed-wing aerodyne equipped with a means of propulsion (MoP), capable of sustained soaring flig ...
that was designed by
Egon Scheibe
Egon Scheibe (28 September 1908 – 26 September 1997) ''
and produced by
Scheibe Flugzeugbau Scheibe Flugzeugbau was a manufacturer of sailplanes and motorgliders in Germany in the second half of the 20th century. Founded by Egon Scheibe at the Munich-Riem Airport to produce his Bergfalke design in 1951,Gunston 1993, p.270 the company h ...
.Said, Bob: ''1983 Sailplane Directory,
Soaring Magazine
''SOARING'' is a magazine published monthly as a membership benefit of the Soaring Society of America. It was first published in 1937. The headquarters is in Hobbs, New Mexico. The magazine's article topics include safety issues and accounts of i ...
'', page 126. Soaring Society of America, November 1983. USPS 499-920
Derived from the unpowered Scheibe Spatz, the Motor Spatz was described in 1983 by
Soaring Magazine
''SOARING'' is a magazine published monthly as a membership benefit of the Soaring Society of America. It was first published in 1937. The headquarters is in Hobbs, New Mexico. The magazine's article topics include safety issues and accounts of i ...
as "one of the more primitive of the breed of self-launching sailplanes".
Design and development
The Motorspatz was an early attempt to create a self-launching glider. Scheibe accomplished this by mounting a
Hirth
Hirth Engines GmbH is an engine manufacturer based in Benningen, Germany. It is currently a part of the UMS Aero Group. Hirth began manufacturing aero engines in the 1920s, was taken over by Heinkel in WWII to develop the Heinkel-Hirth jet en ...
engine in the nose of a mostly stock
Spatz
''Spatz'' is a children's comedy series that ran on Children's ITV during the 1990s, produced by Thames Television and created by Andrew Bethell. The show originally ran from 21 February 1990 to 10 April 1992. The show centred on a fast food r ...
glider.
The SF-24 is constructed with a welded steel tube
that mounts the monowheel landing gear, with a small tail wheel for ground maneuvering. The wings and tail surfaces are built with wooden structures and covered in doped
aircraft fabric covering
Aircraft fabric covering is a term used for both the material used and the process of covering aircraft open structures. It is also used for reinforcing closed plywood structures. The de Havilland Mosquito is an example of this technique, as are ...
. The wing has a span, employs an Mu 14%
airfoil
An airfoil (American English) or aerofoil (British English) is a streamlined body that is capable of generating significantly more Lift (force), lift than Drag (physics), drag. Wings, sails and propeller blades are examples of airfoils. Foil (fl ...
and mounts spoilers for glidepath control.
The aircraft was not
type certified
A type certificate signifies the airworthiness of a particular category of aircraft, according to its manufacturing design (''type design''). Certification confirms that the aircraft of a new type intended for serial production is in compliance w ...
and 50 were built.
Operational history
In July 2011 there were two Motorspatz registered in the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
with the
Federal Aviation Administration
The Federal Aviation Administration (FAA) is a Federal government of the United States, U.S. federal government agency within the United States Department of Transportation, U.S. Department of Transportation that regulates civil aviation in t ...
, including one SF-24 in the ''Experimental - Exhibition'' category and one SF-24B in the ''Experimental - Research and Development'' category.
Variants
;SF-24
:Initial version
;SF-24A
:Improved version
;SF-24B
:Improved version