Schweizer SGU 2-22
Designed by Ernest Schweizer, the two-seater 2-22 first flew in 1947 and entered service the following year and became (until superseded by the 2-23) the most used two- place trainer in America. It was derived from the SGU 1-7 and developed through A, B, C, D and E models.
Of all-metal construction with metal and fabric covering, the 2-22 has strut-braced constant chord aluminium alloy hjgh-set wings, with a metal D-tube leading edge ahead of the main spar and fabric covering aft of it; there are no flaps or spoilers. The fuselage is a welded chrome-molybdenum steel tube structure with fabric covering, and there is a non-retractable and unsprung Goodyear mono-wheel with brake immediately aft of a nose skid mounted on rubber blocks; there is also a rubber-mounted tailskid. The fin and rudder are of aluminium with fabric covering, while the strut-braced tailplane and elevators are steel tube frameworks with fabric covering. The two pilots are seated in tandem with dual controls under a transparent, sideways-opening canopy, and in its initial form the 2-22 had tandem open cockpits with provision for an enclosed canopy.
The original 2-22 had a 204 kg / 450 lb empty weight and 377 kg / 830 lb gross with no rear side windows and no doors.
The SGU 2-22A (3 built) which appeared in 1957 featured several changes in the cockpit section, a redesign for the U.S. Air Force Academy with lengthened nose, full canopy and 409 kg / 900 lb gross weight.
The B is the original modified for 409 kg / 900 lb gross weight.
The C incorporated the A and B changes plus smaller ailerons; 103 built, including 28 kits (described as the 2-22CK). The D is the original model with small ailerons. The E was the last production model, with larger spoilers, roomier cockpit, new canopy with wing root changes to provide for a skylight.
No. Built: 258, including kits sold for amateur construction.
The 2-33 was designed to succeed the 2-22 as something a little plusher and better performing, thereby making it easier to attract new students into soaring.
Wing span: 13.11 m / 43 ft 0 in
Wing area: 19.51 sq.m / 210 sq.ft
Aspect ratio: 8.81
Airfoil: NACA 4301 2A
Length: 25 ft 8.5 in
Height: 9 ft 0 in
Empty Weight: 213 kg / 470 lb
Payload: 195 kg / 430 lb
Gross Weight: 408 kg / 900 lb
Wing Load: 20.91 kg/sq.m / 4.8 lb/sq.ft
Max speed: 89 mph (in smooth air)
L/DMax: 17 76 kph / 41 kt / 47 mph
MinSink: 1.07 m/s / 3.5 fps / 2.07 kt
Min sinking speed (solo): 2.8ft/sec