A 1952 aerobatic glider, designed by Alfred Vogt and Wolf Hirth. Forty five were built.

Vogt Lo 100 Zwergreiher
Length: 20.177 ft / 6.15 m
Wingspan: 32.808 ft / 10.0 m
Wing area: 10.9 sq.m
Aspect ratio: 9.17
Airfoil: Clark Y 16%
Empty Weight: 143 kg
Gross Weight: 265 kg
Wing Load: 24.3 kg/sq.m
Water Ballast: 0
Max. speed: 157 kts / 290 km/h
Seats: 1
MinSink: 0.80 m/s 72 kph
L/DMax: 25 85 kph

Circa 1947

The 15m Standard class Sagitta (Arrow) sailplane was designed and built by Piet Alsema, who formed NV Vliegtuigbouw to put it into production at Teuge airfield, near Apeldoorn, Holland, at a rate of one every two months in 1964. It was issued an airworthiness certificate in the aerobatic and cloud flying category.

The single-seat Sagitta is of conventional all-wood construction with a large, sliding blown canopy giving the pilot, seated over the wing leading edge, all-round visibility. The canopy slides backward and can be fixed open in flight at several positions. The mid-set wooden wings have a single spar and a plywood leading edge torsion box and the plain ailerons are also of wood; the wing is fabric covered over 25% of its area. Air brakes of a special design operate on both the upper and lower wing surfaces. Aluminium spoilers 20 inch long in the upper and lower wing limit top speed to 168 mph (test craft were dived at 193 mph). Fuselage and tailplane are all-wood; fuselage and tail frames are pine and plywood, fittings are steel. Aerolite glue is employed throughout. The fin and rudder is swept and the cantilever tailplane can be folded when the sailplane is towed in a trailer. All control surfaces connect automatically on assembly. A fixed monowheel with brake comprises the landing gear.

The 1964 price was around US$3212.

A special long-wing model of 58.55 ft span was built for championship meets.

The Sagitta first flew in prototype form on 4 July 1960. It was followed on 24 November 1961 by the first of the production aircraft, designated Sagitta 2; some 20 being produced.

A 17m (55 ft 9 in span) development of the Sagitta, known as the Super Sagitta, was reported in the spring of 1964, this being very similar apart from the increase in wing and tail surface areas, but the Super Sagitta remained a project only.

Gallery

Sagitta
Span: 48.5 ft
Length: 21 ft 3 in
Empty weight: 463 lb
Useful load: 243 lb
Root chord: 4 ft
Tip chord: 1 ft 8 in
Tail span: 9 ft 10 in
Wing area: 129 sq.ft
Aspect ratio: 18.7

Sagitta 013
Wing span: 15m / 49.2ft
Wing area: 11.98sq.m / 129sq.ft
Aspect ratio: 18.7
Airfoil: NACA 63-618/4412
Length: 6.47 m / 21 ft 2 in
Empty Weight: 215kg / 473lb
Payload: 105kg / 232lb
Gross Weight: 320kg / 705lb
Water ballast: None
Wing Load: 26.71kg/sq.m / 5.46lb/sq.ft
Max speed: 146 kt / 270 km/h
Max rough air speed: 108 kt / 200 km/h
Stalling speed: 35.5 kt / 66 km/h
L/DMax: 34 at 52.3 kt / 97 km/h
MinSink: 0.64 m/s / 2.1 fps / 1.24 kt at 42 kt / 78 km/h
Structure: wood/ fabric wings and tail, wood fuselage
Seats: 1

Sagitta 2
Span: 49 ft 2.5 in
Length: 21 ft 2.75 in
Height: 3 ft 11 in
Wing area: 129.2 sq ft
Aspect ratio: 18.7
Empty weight: 478 lb
Max weight: 705 lb
Max speed: 168 mph
Min sinking speed: 2.1 ft/sec at 48 mph
Best glide ratio: 37:1 at 60 mph