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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}}
{| class="infobox" style="width: 22em;"
{{More footnotes|date=December 2012}}
|+ style=font-size:large;| '''Rolladen-Schneider LS2'''
<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. -->
| colspan=2 style="text-align:left;font-size:smaller" |
{{Infobox aircraft
|-
| name=LS2
| '''Type designation'''
| image=File:Rolladen Schneider LS2.jpg
| LS2
| caption=
|-
| type=[[FAI Standard Class|Standard-class]] sailplane
| '''Competition class'''
| national_origin=Germany
| [[FAI Standard Class|Standard]]
| manufacturer=[[Rolladen-Schneider]]
|-
| designer=
| '''Number built'''
| first_flight=1973
| 1
| introduction=
|-
| retired=
| '''Crew'''
| status=
| 1
| primary_user=
|-
| number_built=1
| '''Length'''
| developed_from=
| 6.80 m
| variants=
|-
}}
| '''Cockpit width'''
| 0.59 m
|-
| '''Cockpit height'''
| 0.81 m
|-
| '''Wingspan'''
| 15 m
|-
| '''Wing area'''
| 10.29 m&sup2;
|-
| '''Aspect ratio'''
| 21.87
|-
| '''Wing profile:'''
| FX 67-K-170, FX 67-K-150
|-
| '''Empty mass'''
| ca. 240 kg
|-
| '''Maximum mass'''
| 360 kg
|-
| '''Wing loading'''
| 33 to 35 kg/m&sup2;
|-
| '''Min. sink rate'''
| ca. 0.65 m/s at 80 km/h
|-
| '''Best glide ratio'''
| ca. 40 at 100 km/h
|}


The '''Rolladen-Schneider LS2''' is a 15 metre [[span]] single seat [[glider]] prototype with trailing edge [[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 (aeronautical engineer)|Walter Schneider]] in response to changes in the [[FAI Standard Class|Standard Class]] rules. Only one example was built.
==History==


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.
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==
The design was nevertheless unsatisfactory. The [[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.
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 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 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.


==Sources==
==Specifications==
{{Aircraft specs
*[http://www.ls-flugzeugbau.de/index-e.html LS-Flugzeugbau website]
|prime units? = met

|crew=One
|length m=6.80
|length ft=22
|length in=4
|span m=15.00
|span ft=49
|span in=3
|wing area sqm=10.3
|wing area sqft=111
|empty weight kg=240
|empty weight lb=530
|gross weight kg=360
|gross weight lb=790
|glide ratio=<!-- sailplanes -->40
|sink rate ms=<!-- sailplanes -->0.65
|sink rate ftmin=<!-- sailplanes -->128

}}

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

==References==
{{commons category|Rolladen-Schneider LS2}}
*[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]


[[Category:Glider aircraft]]
{{Rolladen-Schneider aircraft}}

[[Category:Sailplanes 1970-1979]]
[[Category:German sailplanes 1970-1979]]
[[Category:Rolladen-Schneider aircraft]]
[[Category:1970s German sailplanes]]
[[Category:Aircraft first flown in 1973]]
[[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]
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