Schempp-Hirth Standard Cirrus

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The Standard Cirrus is a glider built by Schempp-Hirth.

The Standard Cirrus was designed by Dipl. Ing. Klaus Holighaus and flew for the first time in March 1969. It is a Standard Class glider with a 15 metre span and no camber changing flaps. The all-moving tailplane that was a feature of many designs of that period due to its theoretically higher efficiency, caused less than desirable high speed stability characteristics, and so modifications were made to the early design. Even so, the glider is still very sensitive in pitch.

By April 1977, when production by Schempp-Hirth ended, a total of 700 Standard Cirruses had been built, including 200 built under licence by Grob between 1972 and July 1975. A French firm, Lanaverre Industrie, had also built 30 Standard Cirruses under licence by 1979. VTC of Yugoslavia also licence-built Standard Cirruses, reaching 14 by 1979.

Improvements were made with the Standard Cirrus 75. These included better air-brakes with an increased area and a modified nose.

The last Cirrus model was the G/81 built by VTC until 1985. This incorporated a longer fuselage and canopy and a conventional tailplane and elevator with the wings of the Cirrus 75. All models of Cirrus have proved very popular in recent years in 'Club Class' Competitions worldwide.

The Cirrus was superseded by the Discus.

pecifications

aerospecs
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met or eng?= met

crew=One
capacity=80 kg (176 lb) water ballast
length m=6.35
length ft=20
length in=10
span m=15.00
span ft=49
span in=3
swept m=
swept ft=
swept in=
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dia m=
dia ft=
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width m=
width ft=
width in=
height m=1.32
height ft=4
height in=4
wing area sqm=10.0
wing area sqft=108
swept area sqm=
swept area sqft=
rot area sqm=
rot area sqft=
volume m3=
volume ft3=
aspect ratio= 22.5
wing profile= FX S-02-196 modified
empty weight kg=ca. 215
empty weight lb=473
gross weight kg=390
gross weight lb=860
lift kg=
lift lb=

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max speed kmh=220
max speed mph=140
max speed mach=
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range km=
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ceiling m=
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glide ratio= 38.5 (Measured ~36)
climb rate ms=
climb rate ftmin=
sink rate ms= 0.6
sink rate ftmin= 120

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References

* [http://www.schempp-hirth.com/ Schempp-Hirth Website]
* [http://www.standardcirrus.org/ Standard Cirrus Web Page]
* Simons M, Segelflugzeuge 1965-2000, Eqip, 2004
* [http://www.sailplanedirectory.com/ Sailplane Directory]
* [http://www.ssa.org/UsTeam/ust_champs.htm American narrative of World Championships (see 1968)] .