|
| Span |
Area |
Empty Weight |
Payload |
Gross Weight |
Wing Load |
Water Ballast |
| m |
ft |
sq.m |
sq.ft |
kg |
lb. |
kg |
lb. |
kg |
lb. |
kg
/sq.m |
lb.
/sq.ft |
kg |
lb. |
| 15 |
49.2 |
14.81 |
159.4 |
213 |
470 |
127 |
280 |
340 |
750 |
22.96 |
4.7 |
0 |
0 |
| Aspect
ratio: |
15.12 |
| Airfoil: |
NACA 43012A |
| Structure: |
all metal |
| Engine: |
|
Comment:
The ﾑstandardﾒ 1-23 introduced in 1948, and with
its later versions, the B, C, D, E,F,G,H was for
years Americaﾒs most numerous performance
sailplane. The 1-23B & C were built for the 1952
World Championships held at Madrid ﾖ Cuatro
Vientos, Spain flown by Paul MacCready and Paul
Schweizer. They both had the wing spars spliced
and stretched to 15.24 m./ 50 ft., and the C had
thicker wing skins, a heavier spar and weighed
41 kg./ 90 lb more. In 1953 the 1-23D (ATC) was
introduced, a production version of the B. One
flown by Paul MacCready won the 1953 Nationals,
and another was flown 733 km./ 455.5 miles by
Joe Lincoln to earn the Barringer Trophy for
1960. An example belongs to the National Soaring
Museum. The single increased span (16.1 m./ 52.8
ft.) 1-23E was built for Paul MacCready to fly
in the 1954 World Championships where it
finished 4th. It has balanced air brakes and
originally did not a wheel, using the skid for
takeoff and landing. Paul Bikle won two world
altitude records with the 1-23E (14.102 m./
46.267 ft. absolute 12.894 m./ 42.303 ft. gain).
One F was built, being an E with heavier butted
skins on the wing. The 1-23G (ATC) was a 1954
production model with the longer wing of the E
and F, standard spoilers and a larger vertical
tail of slightly different shape. To the basic 1-
23G model Schweizer added balanced airbrakes,
removable wingtips and other minor modifications
to produce the H model, of which 8 were built.
The more numerous H-15 version has a wingspan
reduced to 15.0 m./ 49.2 ft. qualifying it for
the FAI-OSTIC Standard Class. It was also
produced with removable tips increasing the span
to 16.1 m./ 52.8 ft. 39 of this model were
built. One, which also belongs to the National
Soaring Museum, was substantially modified by
Sterling Starr by the fitting of a new NACA 65
(3)-618 section 16.5 m./ 54 ft. wing. |
|
