Comment:
Although the Standard Cirrus was a follow-on to
the original Open Class Cirrus design, it is
completely different aircraft, with a 15 m. wing
with airbrakes on the top surface only, an all-
moving T-tail and a steel tube skeleton in the
wing-fuselage center section. A Cirrus won the
U.S. Standard Class Nationals in 1969. Despite a
claimed L/D ratio of 38, measured performance
by both Paul Bikle and Ricard H. Johnson
demonstrated less than 36. In 1975 an improved
version called the Cirrus 75 was introduced with
redesigned wing fairings, larger airbrakes and
other improvements. 176 were manufactured under
license by Burkhart Grob in Mindelheim, Germany.
After production in
Germany ceased in 1977, the Standard Cirrus was
manufactured in Serbia by Vazduhoplovno Tehnicki
Centar (later Jastreb Fabrika Aviona Jedrilica),
first the Cirrus 75 and 75B version, and
subsequently a modified Cirrus 81 with roomier
cockpit and variable incidence tailplane. Between
1977 and 1978, the French company Lanaverre
Industrie built 35 ships designated CS 11/75 L
St. and CS 11/78 L St. These ships overlap the
German serial numbers with serial numbers
beginning at one. ATC
Specifications shown are for the Standard
Cirrus.
Additional information can be found on the
Standard Cirrus Web Page at
http://www.standardcirrus.org/ |
