Haufe HA S 2 Hobby

Design and development

The HA-S-2 all-metal sailplane design was built as a follow-on to the previous Haufe-Hill collaboration, the Haufe HA-G-1 Buggie all-metal utility glider. The HA-S-2 took five years to design and build and first flew in Utah in 1967. The aircraft features a fixed monowheel landing gear, spoilers and is registered as an Experimental - amateur-built.

After the prototype HA-S-2 was finished a second example was completed from plans by Russell Worrell of Morgan, Utah in 1971. This version has a cockpit that is 2 in (5.1 cm) wider and has in increased wingspan of 43 ft (13.1 m), 1.8 ft (0.5 m) greater than the original. The second example was designated as the HA-S-3 Hobby and is also registered as an Experimental - amateur-built.

Variants

HA-S-2

Original model with a 41.23 ft (12.6 m) wingspan. One built.

HA-S-3

Second model built with a 2 in (5.1 cm) wider cockpit and a 43 ft (13.1 m) wingspan. One built.

Specifications (HA-S-2)

Data from Soaring

General characteristics

Crew: one

Wingspan: 41 ft 2.4 in (12.558 m)

Wing area: 100 sq ft (9.3 m²)

Aspect ratio: 17:1

Airfoil: Clark Y

Empty weight: 340 lb (154 kg)

Gross weight: 540 lb (245 kg)

Performance

Maximum glide ratio: 28:1 at 46 mph (74 km/h)

Rate of sink: 174 ft/min (0.88 m/s) at 40 mph (64 km/h)

Wing loading: 5.4 lb/sq ft (26 kg/m²)