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The ICA IS-28 was a two-seat sailplane produced in Romania in the 1970s. An all-metal aircraft of conventional design with a T-tail, it was originally produced with 15-metre wings, but in 1973, production shifted to the IS-28B with 17-metre wings and numerous aerodynamic refinements. These included a smaller tail with decreased dihedral, decreased dihedral on the wings, and redesigned fuselage contours. This version first flew on 26 April 1973 and was subsequently produced in versions with flaps (IS-28B2) and without (IS-28B1). Around 100 had been built by the early 1980s, with a substantial number sold for export.
The IS-28 was also produced as a motorglider, initially as just a powered version of the IS-28B2 (designated the IS-28M1) and then as the more radically redesigned IS-28M2. This version had an entirely new forward fuselage offering side-by-side seating for the two occupants, wings relocated to a low-set position on the fuselage, and tailwheel undercarriage with main units that semi-retracted backwards into the wings. The rear fuselage, empennage, and outer wing panels remained identical with the sailplane version.
The IS-30 was a refined IS-28B2, identical in most respects other than having all-metal control surfaces (where the IS-28's had been fabric-covered) and a redesigned horizontal stabiliser.
[edit] Variants
- IS-28 - sailplane with 15 metre wings
- IS-28B
- IS-28B1 - sailplane with 17 metre wings and DFS-style airbrakes
- IS-28B2 - similar to IS-28B1 with flaps and Schempp-Hirth-style airbrakes
- IS-28M
- IS-28M1 - motorglider version of IS-28B1 with Limbach SL.1700E1 engine
- IS-28M2 (aka IAR-34)- motorglider with side-by-side seating and three-point undercarriage
- IAR-28MA - IS-28M2 with new wing, split flaps and Limbach L.2000E01 engine
- IS-30 - all-metal IS-28B2 with new tailplane.
- IAR-46 - trainer version of IS-28M2 with reduced wingspan and Rotax 912A engine
[edit] Specifications (IS-28B2)
General characteristics
- Crew: One pilot
- Capacity: 1 passenger
- Length: 8.36 m (27 ft 5 in)
- Wingspan: 17.00 m (55 ft 9 in)
- Height: 1.80 m (5 ft 11 in)
- Wing area: 18.2 m² (196 ft²)
- Aspect ratio: 15.8
- Empty weight: 375 kg (826 lb)
- Gross weight: 590 kg (1,300 lb)
Performance
- Maximum speed: 226 km/h (140 mph)
- Maximum glide ratio: 34
- Rate of sink: 0.6 m/s (122 ft/min)
[edit] References
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions, 528.
- Hardy, Michael (1982). Gliders and Sailplanes of the World. Shepperton: Ian Allen, 54-55.
- Coates, Andrew (1978). Jane's World Sailplanes and Motor Gliders. London: MacDonald and Jane's, 124.
- Simpson, R. W. (1995). Airlife's General Aviation. Shrewsbury: Airlife Publishing, 342.
- Barnett, Cliff (20 November 1982). "IS-30: Romania's smooth two-seater". Flight International: 1484-85.
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