The ICA IS-29 was a sailplane built in Romania in the 1970s. The prefix IS comes from Iosif Șilimon, the Romanian IAR (Industria Aeronautică Română) aeronautical engineer who designed it.
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| IS-29, IS-31, and IS-33 | |
|---|---|
 IS-29D2 | |
| General information | |
| Type | Club-class Sailplane |
| National origin | Romania |
| Manufacturer | ICA |
| Designer | |
| Number built | >200 |
| History | |
| First flight | April 1970 |
Design and development
The 15-metre (49ft 3in) single-seat variant of the IS-28 series, the IS-29D2 single-seater has retractable gear, camber-changing flaps and Hütter-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 metre (62 ft) -29E2 and 20 metre (66 ft) -29E3 versions and a flapless, fixed gear 16.5-metre (54 feet) ‘club’ model -29G.
The IS-29 was also produced in a motorglider version, designated the IS-29EM. This shared the low-set wings and three-point undercarriage of the IS-28M2, and the new wings of the IS-28MA.
Variants
- IS-29
- IS-29B - wooden wings of 15-metre span
- IS-29D
- IS-29D2
- IS-29D2 Club - Club-class version of IS-29D2
- IS-29D2
- IS-29E - open class version with ballast tanks
- IS-29E2 - version with 19-metre wings
- IS-29E3 - version with 20-metre wings
- IS-29EM - motorglider version
- IS-29G - Club-class version with 16.5-metre wings
- IS-31 - IS-29 with 20-metre wings and linked flaps and ailerons
- IS-33 - IS-29 with tanks for 150 kg (300 lb) of water ballast
Specifications (IS-29D2)
Data from Jane's All the World's Aircraft 1988-89[1][2]
General characteristics
- Crew: One
- Length: 7.3 m (23 ft 11 in)
- Wingspan: 15 m (49 ft 3 in)
- Height: 1.68 m (5 ft 6 in)
- Wing area: 10.4 m2 (112 sq ft)
- Aspect ratio: 21.6
- Airfoil: root:Wortmann FX 61-163, tip:Wortmann FX 60-126/1
- Empty weight: 240 kg (529 lb)
- Max takeoff weight: 360 kg (794 lb)
Performance
- Stall speed: 65 km/h (40 mph, 35 kn) flaps down
- Never exceed speed: 225 km/h (140 mph, 121 kn) in smooth air
- Max rough air speed: 172 km/h (107 mph)
- Max aero-tow speed: 140 km/h (87 mph)
- Max winch-launch speed: 130 km/h (81 mph)
- g limits: +5.2 -2.65
- Maximum glide ratio: 37
- Best glide speed: 93 km/h (58 mph)
- Rate of sink: 0.65 m/s (128 ft/min)
- Minimum sink speed: 78 km/h (48 mph)
- Wing loading: 34.62 kg/m2 (7.09 lb/sq ft)
See also
Related development
Aircraft of comparable role, configuration, and era
Notes
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