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→top: The LS2 is a fully type certificated design. It is better to describe the World Championships as taking place in Australia than South Australia.
 
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{{Short description|Single seat German glider, 1973}}
__NOTOC__
{{More footnotes|date=December 2012}}
<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. -->
<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. -->
{|{{Infobox Aircraft Begin
{{Infobox aircraft
| name=LS2
| name=LS2
| image=
| image=File:Rolladen Schneider LS2.jpg
| caption=
| caption=
}}{{Infobox Aircraft Type
| type=[[FAI Standard Class|Standard-class]] sailplane
| type=[[FAI Standard Class|Standard-class]] sailplane
| national origin=Germany
| national_origin=Germany
| manufacturer=[[Rolladen-Schneider]]
| manufacturer=[[Rolladen-Schneider]]
| designer=
| designer=
| first flight=ca. {{avyear|1973}}
| first_flight=1973
| introduced=
| introduction=
| retired=
| retired=
| status=
| status=
| primary user=
| primary_user=
| number built=1
| number_built=1
| developed from=
| developed_from=
| variants with their own articles=
| variants=
}}
}}
|}


The '''Rolladen-Schneider LS2''' is a 15 metre [[Span (architecture)|span]] single seat [[Glider (sailplane)|glider]] prototype with trailing edge [[Air brake (aircraft)|air brakes]], designed and built by [[Rolladen-Schneider Flugzeugbau GmbH]] circa 1973.
The '''Rolladen-Schneider LS2''' is a 15-metre [[Span (architecture)|span]] single seat [[Glider (sailplane)|glider]] prototype with [[Flap (aeronautics)|trailing-edge flaps]], designed and built by [[Rolladen-Schneider Flugzeugbau GmbH]] c. 1973.


The LS2 was designed by [[Wolf Lemke]] and [[Walter Schneider]] in response to changes in the [[FAI Standard Class|Standard Class]] rules. A single experimental prototype was built. First flow in 1973, it won the German Championships that year and went on to win the World championships in Australia in 1974.
The LS2 was designed by [[Wolf Lemke]] and [[Walter Schneider (aeronautical engineer)|Walter Schneider]] in response to changes in the [[FAI Standard Class|Standard Class]] rules. Only one example was built.


First flown in 1973, it won the German Championships that year. [[Helmut Reichmann]] competing in the LS2 won the 14th World championships in [[Waikerie]], Australia in 1974.
The design was nevertheless unsatisfactory. The [[Air brake (aircraft)|air brakes]] occupied most of the trailing edge of the wing, being intended also as a means to lower speeds and improve climb rates in [[thermals]]. Class rules did not allow these surfaces to be coupled to the ailerons. The resultant sluggish roll rate from the very short [[ailerons]] led to poor and unsafe flying characteristics. Thrice World Champion [[Helmut Reichmann]] reportedly said the performance advantages were not worth the extra pilot workload.


==Design==
The LS2 highlighted inconsistencies in the rules that promoted unwise design trends, with trade-offs having to be made by designers between competitiveness and safety. Many observers also felt that trailing edge air brakes were against the spirit of the Standard Class, an issue that affected other types such as the [[Eiri-Avion PIK-20|PIK-20]], [[Glasflügel H-201|Libelle]] and [[Schreder HP-8]].
The design was nevertheless unsatisfactory. The flaps occupied most of the trailing edge of the wing, being intended both as a means to control speed and improve climb rates in narrow [[thermals]]. Class rules did not allow these surfaces to be coupled to the ailerons. The resultant sluggish roll rate from the very short [[ailerons]] led to poor and unsafe flying characteristics. Thrice World Champion [[Helmut Reichmann]] reportedly said the performance advantages were not worth the extra pilot workload.

The LS2 highlighted inconsistencies in the rules that promoted unwise design trends, with trade-offs having to be made by designers between competitiveness and safety. Many observers also felt that trailing-edge flaps were against the spirit of the Standard Class, an issue that affected other types such as the [[Eiri-Avion PIK-20|PIK-20]], [[Glasflügel H-201|Libelle]] and [[Schreder HP-8]].


The [[International Gliding Commission]] voted a new set of rules in 1974, prohibiting any lift-enhancing devices in the Standard Class and creating the [[FAI 15 metre Class|15 metre Class]] where these were allowed without any restriction.
The [[International Gliding Commission]] voted a new set of rules in 1974, prohibiting any lift-enhancing devices in the Standard Class and creating the [[FAI 15 metre Class|15 metre Class]] where these were allowed without any restriction.


<!-- ==Development== -->
<!-- ==Operational history== -->
<!-- ==Variants== -->
<!-- ==Units using this aircraft/Operators (choose)== -->
==Specifications==
==Specifications==
{{Aircraft specs
{{aerospecs
|prime units? = met
|ref=
|met or eng?=<!-- eng for US/UK aircraft, met for all others. You MUST include one or the other here, or no specifications will show -->met


|crew=One
|crew=One
|capacity=
|length m=6.80
|length m=6.80
|length ft=22
|length ft=22
Line 48: Line 44:
|span ft=49
|span ft=49
|span in=3
|span in=3
|swept m=<!-- swing-wings -->
|swept ft=<!-- swing-wings -->
|swept in=<!-- swing-wings -->
|rot number=<!-- helicopters -->
|rot dia m=<!-- helicopters -->
|rot dia ft=<!-- helicopters -->
|rot dia in=<!-- helicopters -->
|dia m=<!-- airships etc -->
|dia ft=<!-- airships etc -->
|dia in=<!-- airships etc -->
|width m=<!-- if applicable -->
|width ft=<!-- if applicable -->
|width in=<!-- if applicable -->
|height m=
|height ft=
|height in=
|wing area sqm=10.3
|wing area sqm=10.3
|wing area sqft=111
|wing area sqft=111
|empty weight kg=240
|swept area sqm=<!-- swing-wings -->
|swept area sqft=<!-- swing-wings -->
|rot area sqm=<!-- helicopters -->
|rot area sqft=<!-- helicopters -->
|volume m3=<!-- lighter-than-air -->
|volume ft3=<!-- lighter-than-air -->
|aspect ratio=<!-- sailplanes -->
|empty weight kg=ca. 240
|empty weight lb=530
|empty weight lb=530
|gross weight kg=360
|gross weight kg=360
|gross weight lb=790
|gross weight lb=790
|lift kg=<!-- lighter-than-air -->
|lift lb=<!-- lighter-than-air -->

|eng1 number=
|eng1 type=
|eng1 kw=<!-- prop engines -->
|eng1 hp=<!-- prop engines -->
|eng1 kn=<!-- jet/rocket engines -->
|eng1 lbf=<!-- jet/rocket engines -->
|eng1 kn-ab=<!-- afterburners -->
|eng1 lbf-ab=<!-- afterburners -->
|eng2 number=
|eng2 type=
|eng2 kw=<!-- prop engines -->
|eng2 hp=<!-- prop engines -->
|eng2 kn=<!-- jet/rocket engines -->
|eng2 lbf=<!-- jet/rocket engines -->
|eng2 kn-ab=<!-- afterburners -->
|eng2 lbf-ab=<!-- afterburners -->

|max speed kmh=
|max speed mph=
|max speed mach=<!-- supersonic aircraft -->
|cruise speed kmh=<!-- if max speed unknown -->
|cruise speed mph=<!-- if max speed unknown -->
|range km=
|range miles=
|endurance h=<!-- if range unknown -->
|endurance min=<!-- if range unknown -->
|ceiling m=
|ceiling ft=
|glide ratio=<!-- sailplanes -->40
|glide ratio=<!-- sailplanes -->40
|climb rate ms=
|climb rate ftmin=
|sink rate ms=<!-- sailplanes -->0.65
|sink rate ms=<!-- sailplanes -->0.65
|sink rate ftmin=<!-- sailplanes -->128
|sink rate ftmin=<!-- sailplanes -->128


|armament1=
|armament2=
|armament3=
|armament4=
|armament5=
|armament6=
}}
}}

<!-- ==See also== -->
==See also==
{{aircontent
{{aircontent
<!-- include as many lines are appropriate. additional lines/entries with carriage return. -->
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|similar aircraft=<!-- similar or comparable aircraft -->
|similar aircraft=<!-- similar or comparable aircraft -->
|lists=<!-- related lists -->
|lists=<!-- related lists -->
*[[List of gliders]]
}}
}}


==References==
==References==
{{commons category|Rolladen-Schneider LS2}}
*[http://www.ls-flugzeugbau.de/index-e.html LS-Flugzeugbau website]
*[https://web.archive.org/web/20040824135540/http://www.ls-flugzeugbau.de/index-e.html LS-Flugzeugbau website]
*Simons M, Segelflugzeuge 1965-2000, Equip, 2004
*Simons M, Segelflugzeuge 1965-2000, Equip, 2004
*[http://www.sailplanedirectory.com/ Sailplane Directory]
*[http://www.sailplanedirectory.com/ Sailplane Directory]
<!-- ==External links== -->


{{Rolladen-Schneider aircraft}}
{{Rolladen-Schneider aircraft}}
{{Aviation lists}}


[[Category:German sailplanes 1970-1979]]
[[Category:Glider aircraft]]
[[Category:Rolladen-Schneider aircraft]]
[[Category:Rolladen-Schneider aircraft]]
[[Category:1970s German sailplanes]]

[[Category:Aircraft first flown in 1973]]
[[de:Rolladen Schneider LS2]]
[[Category:T-tail aircraft]]
[[Category:Shoulder-wing aircraft]]

Latest revision as of 22:01, 5 November 2024

LS2
General information
TypeStandard-class sailplane
National originGermany
ManufacturerRolladen-Schneider
Number built1
History
First flight1973

The Rolladen-Schneider LS2 is a 15-metre span single seat glider prototype with trailing-edge flaps, designed and built by Rolladen-Schneider Flugzeugbau GmbH c. 1973.

The LS2 was designed by Wolf Lemke and Walter Schneider in response to changes in the Standard Class rules. Only one example was built.

First flown in 1973, it won the German Championships that year. Helmut Reichmann competing in the LS2 won the 14th World championships in Waikerie, Australia in 1974.

Design

[edit]

The design was nevertheless unsatisfactory. The flaps occupied most of the trailing edge of the wing, being intended both as a means to control speed and improve climb rates in narrow thermals. Class rules did not allow these surfaces to be coupled to the ailerons. The resultant sluggish roll rate from the very short ailerons led to poor and unsafe flying characteristics. Thrice World Champion Helmut Reichmann reportedly said the performance advantages were not worth the extra pilot workload.

The LS2 highlighted inconsistencies in the rules that promoted unwise design trends, with trade-offs having to be made by designers between competitiveness and safety. Many observers also felt that trailing-edge flaps were against the spirit of the Standard Class, an issue that affected other types such as the PIK-20, Libelle and Schreder HP-8.

The International Gliding Commission voted a new set of rules in 1974, prohibiting any lift-enhancing devices in the Standard Class and creating the 15 metre Class where these were allowed without any restriction.

Specifications

[edit]

General characteristics

  • Crew: One
  • Length: 6.80 m (22 ft 4 in)
  • Wingspan: 15.00 m (49 ft 3 in)
  • Wing area: 10.3 m2 (111 sq ft)
  • Empty weight: 240 kg (530 lb)
  • Gross weight: 360 kg (790 lb)

Performance

  • Maximum glide ratio: 40
  • Rate of sink: 0.65 m/s (128 ft/min)

See also

[edit]

Related lists

References

[edit]
Wikimedia Commons has media related to Rolladen-Schneider LS2.
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