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Specifications

• Span 17.0 m./ 55.7 ft
• Area 18.24 sq. m. / 196.3 sq.ft.
• Airfoil Wortmann FX-61-163, root; -126, tip
• Empty weight 400 kg. / 882 lb.
• Payload 190 kg. / 418 lb.
• Gross weight 590 kg. / 1,300 lb.
• Wing loading 32.35 kg. / sq. m. / 6.62 lb. / sq. ft.
• Structure all metal, fabric covered control surfaces on 29 

Performance

• L/D max. 34 93 kph / 51 kt / 58 mph
• Min. sink 0.74 m/s / 2.43 fps / 1.44 kt

Other

• Country of origin Romania
• Designer Iosif Silimon
• No. of seats 2
• No. built about 400
• No. in the U.S. about 50

The 17-meter IS 28B, which first flew in 1976, was manufactured by Intreprinderea de Constructii Aeronautice (Aircraft Construction Company) (‘ICA’), the Romanian state aircraft company at its plant in the city of Brasov. ICA subsequently changed its name to Intreprinderea Aeronautici Romanesc ( Romanian Aircraft Company) (‘IAR’). The IS-28B was developed from the 15 m. IS-28 which appeared in 1970. The all metal structure IS-28B has performance flaps, with upper and lower surface (or optionally, upper surface only) Hutter type airbrakes for approach control, a partially retractable gear and fabric cover on all conrol surfaces. The 28B2 model incorporates detailed improvements. The IS-30 is metal skinned througout and in standard configuration has a fixed gear and no flaps, although these were available as factory options. Top surface only airbrakes are standard on the 30. The tail surface on the 28 fold, but the smaller, more aerodynamically refined, tail of the 30 does not. Specifications given here are for the IS-28B2. ATC

IAR Brasov IS-28M2 (IAR-34) Motor Lark

Specifications

• Span 17.0 m./ 55.7 ft
• Area 18.24 sq. m. / 196.3 sq.ft.
• Airfoil Wortmann
• Empty weight 600 kg. / 1,320 lb.
• Payload 189 kg. / 420 lb.
• Gross weight 789 kg. / 1,740 lb.
• Wing loading 43.26 kg. / sq. m. / 8.86 lb. / sq. ft.
• Engine 51 kW/ 68 bhp Limbach SL 1700 E1
• (IAR 46 – 60 kW/ 80 bhp Rotax 912)
• Structure all metal 

Performance

• L/D max. 27 100 kph / 54 kt / 62 mph
• Min. sink 1.20 m/s / 3.94 fps / 2.33 kt

Other

• Country of origin Romania
• Designer Iosif Silimon
• No. of seats 2
• No. built 50
• No. in the U.S. 4

The side-by-side two-place launching IS-28M2 (now redesignated IAR-34), which first flew in 1976, was developed from the tandem two-place IS-28 M1. The rear fuselage, tailplane and wings are similar to the IS-28B2 glider. Approach control is by upper and lower surface Hutter type airbrakes. The Limbach engine drives an adjustable pitch Hoffmann fully featering propeller. The gear partially retracts aft into the stub center section. Top-surface airbrakes and camber-changing flaps (+15 to –11) are provided, as are full dual controls. The 28M2A model has strengthened wings. The IS 28M2 has been developed into the Rotax powered 11.58 m. /38.0 ft. span IAR-46 light aircraft, which has a 17 m. extended wing sailplane variant. ATC

IAR Brasov IS-29D2 Lark

Specifications

• Span 15.0 m./ 49.2 ft
• Area 10.4 sq. m. / 112 sq.ft.
• Airfoil Wortmann Fx-61 –163, root; -60-126, tip
• Empty weight 240 kg. / 529 lb.
• Payload 120 kg. / 264 lb.
• Gross weight 360 kg / 793 lb.
• Wing loading 34.62 kg. / sq. m. / 7.08 lb. / sq. ft.
• Structure all metal 

Performance

• L/D max. 37 94 kph / 51 kt / 59 mph
• Min. sink 0.65 m/s / 2.13 fps / 1.26 kt

Other

• Country of origin Romania
• Designer Iosif Silimon
• No. of seats 1
• No. built more than 200
• No. in the U.S. about 10

The 15-meter single place sister of the IS-28 series, the IS-29D2 single-seater has retractable gear, camber-changing flaps and Hitter type airbrakes on the upper wing surface only. The T-tail has a fixed stabilizer and elevator. The –29D model is of all metal construction while the earlier –29B has wooden wings. Developments include 19 m. (-29E2) and 20 m. (29E3) versions and a flapless, fixed gear 16.5-meter ‘club’ model (-29G). All EXP except IS-29D2, ATC

IAR Brasov IS-32

Specifications

• Span 20.0 m./ 65.6 ft
• Area 14.68 sq. m. / 158 sq.ft.
• Aspect ratio 27.25
• Airfoil Wortmann FX 67-K-170/1 50
• Empty weight 400 kg. / 882 lb.
• Payload 190 kg. / 419 lb.
• Gross weight 590 kg. / 1,301 lb.
• Wing loading 40.2 kg. / sq. m. / 8,23 lb. / sq. ft.
• Structure metal 

Performance

• L/D max. 44 110 kph / 59 kt / 68 mph
• Min. sink 0.62 m/s / 2.03 fps / 1.20 kt
• 90 kph / 49 kt / 56 mph

Other

• Country of origin Romania
• Designer Iosif Silimon
• No. of seats 2
• No. built about 15
• No. in the U.S. 2

A large span development of the IS-28B2, the all metal –32 has a similar fuselage also with retractable gear but a new wing design employing double taper and externally hinged camber-changing flaps. In addition, top-surface dive brakes are fitted and the flaps and ailerons are interconnected. Despite reasonable performance, the –32 was not competitive with its large span composite two-place contemporaries.

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