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<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. -->{{Inline citations|date=November 2023}}
__NOTOC__
{{Infobox aircraft
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<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. -->
{|{{Infobox Aircraft Begin
|name=IS-29, IS-31, and IS-33
|name=IS-29, IS-31, and IS-33
|image=IS 29D2.jpeg
|image=IS 29D2.jpeg
|caption=IS-29D2
|caption=IS-29D2
}}{{Infobox Aircraft Type
|type=[[FAI Club Class|Club-class]] Sailplane
|type=[[FAI Club Class|Club-class]] Sailplane
|national origin=Romania
|national_origin=Romania
|manufacturer=[[Industria Aeronautică Română|ICA]]
|manufacturer=[[Industria Aeronautică Română|ICA]]
|designer=[[Iosif Silimon]]
|designer=[[Iosif Șilimon]]
|first flight=April {{avyear|1970}}
|first_flight=April 1970
|introduced=
|retired=
|status=
|primary user=
|more users=
|produced=
|produced=
|number built=>200
|number_built=>200
|variants with their own articles=
|variants=
}}
}}
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.
|}


==Design and development==
The '''ICA IS-29''' was a [[sailplane]] built in [[Romania]] in the 1970s. The [[prefix]] IS comes from [[Iosif Silimon]], the Romanian IAR ([[Industria Aeronautică Română]]) aeronautical engineer who designed it. The 15-metre (49 feet) single place sister of the [[IAR IS-28|IS-28]] series, the IS-29D2 single-seater has retractable gear, camber-changing flaps and Hütter type [[air brake (aircraft)|airbrakes]] on the upper wing surface only. The [[T-tail]] has a fixed [[stabilizer (aircraft)|stabilizer]] and [[elevator (aircraft)|elevator]]. The –29D model is of all metal construction while the earlier –29B has wooden wings. Developments include 19&nbsp;metre (62&nbsp;ft) -29E2 and 20&nbsp;m (66&nbsp;ft) -29E3 versions and a flapless, fixed gear 16.5-metre (54&nbsp;feet) ‘club’ model -29G.
The 15-metre (49ft&nbsp;3in) single-seat variant of the [[IAR IS-28|IS-28]] series, the IS-29D2 single-seater has retractable gear, camber-changing flaps and Hütter-type [[air brake (aircraft)|airbrakes]] on the upper wing surface only. The [[T-tail]] has a fixed [[stabilizer (aircraft)|stabilizer]] and [[elevator (aircraft)|elevator]]. The –29D model is of all-metal construction while the earlier –29B has wooden wings. Developments include 19&nbsp;metre (62&nbsp;ft) -29E2 and 20&nbsp;metre (66&nbsp;ft) -29E3 versions and a flapless, fixed gear 16.5-metre (54&nbsp;feet) ‘club’ model -29G.

The aircraft demands reasonable training skills from the pilot, being known for its capability of entering a stall quite quickly, can lead to a spin. This is not uncommon in many gliders. The 29d's supposed deep stall was long debunked by exhaustive test flying in Australia and was well documented in various issue of "Australian Gliding" , the official GFA magazine at the time, in the 1970s. Recovery from stall/spin situations are similar to for example, the [[SZD-50 Puchacz|SZD Puchacz]]. It's general handling is excellent and is highly aerobatic in the right hands, with high positive and negative strength factors.
The pilot should be always aware of the stalling speed during flight and especially at the proximity with the ground (at take offs and landings) where the recovery from this scenario is impossible to perform.


The IS-29 was also produced in a [[motorglider]] version, designated the '''IS-29EM'''. This shared the low-set wings and three-point [[Landing gear|undercarriage]] of the IS-28M2, and the new wings of the IS-28MA.
The IS-29 was also produced in a [[motorglider]] version, designated the '''IS-29EM'''. This shared the low-set wings and three-point [[Landing gear|undercarriage]] of the IS-28M2, and the new wings of the IS-28MA.
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==Specifications (IS-29D2)==
==Specifications (IS-29D2)==
{{Aircraft specs
{{Aircraft specs
|ref=Jane's All the World's Aircraft 1988-89<ref name=JAWA88-89>{{cite book |title=Jane's All the World's Aircraft 1988-89 |year=1988 |publisher=Jane's Information Group |location=London |isbn=0-7106-0867-5 |editor=John W.R. Taylor|page=639}}</ref><ref name=j2mcl>{{cite web|title=ICA IS-29D|url=http://www.j2mcl-planeurs.net/dbj2mcl/planeurs-machines/planeur-fiche_0int.php?code=3504|accessdate=17 January 2014}}</ref>
|ref=Jane's All the World's Aircraft 1988-89<ref name=JAWA88-89>{{cite book |title=Jane's All the World's Aircraft 1988-89 |year=1988 |publisher=Jane's Information Group |location=London |isbn=0-7106-0867-5 |editor=John W.R. Taylor|page=639}}</ref><ref name=j2mcl>{{cite web|title=ICA IS-29D|url=http://www.j2mcl-planeurs.net/dbj2mcl/planeurs-machines/planeur-fiche_0int.php?code=3504|access-date=17 January 2014}}</ref>
|prime units?=met
|prime units?=met
⚫
|crew=One
<!--
General characteristics
-->
|genhide=

⚫
|crew=1
|capacity=
|length m=7.3
|length m=7.3
|length ft=
|length in=
|length note=
|span m=15
|span m=15
|span ft=
|span in=
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|height m=1.68
|height m=1.68
|height ft=
|height in=
|height note=
|wing area sqm=10.4
|wing area sqm=10.4
|wing area sqft=
|wing area note=
|aspect ratio=21.6
|aspect ratio=21.6
|airfoil=root:Wortmann FX 61-163, tip:Wortmann FX 60-126/1
|airfoil=root:Wortmann FX 61-163, tip:Wortmann FX 60-126/1
|empty weight kg=240
|empty weight kg=240
|empty weight lb=
|empty weight note=
|gross weight kg=
|gross weight lb=
|gross weight note=
|max takeoff weight kg=360
|max takeoff weight kg=360
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<!--Performance-->
|max takeoff weight lb=
|max takeoff weight note=
|more general=
<!--*'''Water ballast:''' {{convert||l|USgal impgal|0|abbr=on}}-->
<!--
⚫
Performance
-->
|perfhide=
|stall speed kmh=65
|stall speed kmh=65
|stall speed mph=
|stall speed kts=
|stall speed note= flaps down
|stall speed note= flaps down
|never exceed speed kmh=225
|never exceed speed kmh=225
|never exceed speed mph=
|never exceed speed note=in smooth air<br />
*'''Max rough air speed:''' {{cvt|172|km/h}}
|never exceed speed kts=
⚫
*'''Max aero-tow speed:''' {{cvt|140|km/h}}
|never exceed speed note=in smooth air</li>
*'''Max rough air speed:''' {{convert|172|kph|kn mph|abbr=on}}</li>
*'''Max winch-launch speed:''' {{cvt|130|km/h}}
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*'''Max aero-tow speed:''' {{convert|140|kph|kn mph|abbr=on}} </li>
*'''Max winch-launch speed:''' {{convert|130|kph|kn mph|abbr=on}}
|g limits=+5.2 -2.65
|g limits=+5.2 -2.65
|glide ratio=37</li>
|glide ratio=37<br />
*'''Best glide speed:''' {{convert|93|kph|kn mph|abbr=on}}
*'''Best glide speed:''' {{cvt|93|kph}}
|sink rate ms=0.65
|sink rate ms=0.65
|sink rate ftmin=<!-- sailplanes -->
|sink rate note=<br />
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*'''Minimum sink speed:''' {{cvt|78|km/h}}
|sink rate note=</li>
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*'''Minimum sink speed:''' {{convert|78|kph|kn mph|abbr=on}}
|lift to drag=
|wing loading kg/m2=34.62
|wing loading kg/m2=34.62
|wing loading lb/sqft=
|wing loading note=
|more performance=
|avionics=
}}
}}
<!-- ==See also== -->
==See also==
{{aircontent
{{aircontent
<!-- include as many lines are appropriate. additional lines/entries with carriage return. -->
<!-- include as many lines are appropriate. additional lines/entries with carriage return. -->
|see also=
|see also=
|related=<!-- related developments -->
|related=<!-- related developments -->
*[[ICA IS-28]]
|similar aircraft=<!-- similar or comparable aircraft -->
|similar aircraft=<!-- similar or comparable aircraft -->
*[[Pilatus B-4]]
*[[Schweizer SGS 1-34]]
|lists=<!-- related lists -->
|lists=<!-- related lists -->
}}
}}


==Notes==
==Notes==
{{commonscat}}
===Citations===
{{reflist}}
{{reflist}}


==Further reading==
===Bibliography===
* [[Soaring Society of America]]
* [[Soaring Society of America]]
* {{cite book |last= Taylor |first= Michael J. H. |title=Jane's Encyclopedia of Aviation |year=1989 |publisher=Studio Editions |location=London |page=528 }}
* {{cite book |last= Taylor |first= Michael J. H. |title=Jane's Encyclopedia of Aviation |year=1989 |publisher=Studio Editions |location=London |page=528 }}
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* {{cite book |last= Simpson |first= R. W. |title=Airlife's General Aviation |year=1995 |publisher=Airlife Publishing |location=Shrewsbury |page= 342}}
* {{cite book |last= Simpson |first= R. W. |title=Airlife's General Aviation |year=1995 |publisher=Airlife Publishing |location=Shrewsbury |page= 342}}
* {{cite book |title=Jane's All the World's Aircraft 1977-78 |publisher=Jane's Yearbooks |location=London |page=608 }}
* {{cite book |title=Jane's All the World's Aircraft 1977-78 |publisher=Jane's Yearbooks |location=London |page=608 }}
<!-- ==External links== -->


{{ICA aircraft}}
{{ICA aircraft}}
{{IAR_Aircraft}}
{{IAR_Aircraft}}


[[Category:Romanian sailplanes 1970–1979]]
[[Category:1970s Romanian sailplanes]]
[[Category:ICA aircraft]]
[[Category:ICA aircraft]]
[[Category:Glider aircraft]]
[[Category:Aircraft first flown in 1970]]
[[Category:T-tail aircraft]]
[[Category:Shoulder-wing aircraft]]

Latest revision as of 02:57, 11 September 2024

IS-29, IS-31, and IS-33
IS-29D2
General information
TypeClub-class Sailplane
National originRomania
ManufacturerICA
Designer
Number built>200
History
First flightApril 1970

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.

Design and development

[edit]

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

[edit]
  • IS-29
    • IS-29B - wooden wings of 15-metre span
    • IS-29D
      • IS-29D2
        • IS-29D2 Club - Club-class version of 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)

[edit]

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

[edit]

Related development

Aircraft of comparable role, configuration, and era

Notes

[edit]
Wikimedia Commons has media related to ICA IS-29.

Citations

[edit]
  1. ^ John W.R. Taylor, ed. (1988). Jane's All the World's Aircraft 1988-89. London: Jane's Information Group. p. 639. ISBN 0-7106-0867-5.
  2. ^ "ICA IS-29D". Retrieved 17 January 2014.

Bibliography

[edit]
  • Soaring Society of America
  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 528.
  • Hardy, Michael (1982). Gliders and Sailplanes of the World. Shepperton: Ian Allan. pp. 54–55.
  • Coates, Andrew (1978). Jane's World Sailplanes and Motor Gliders. London: MacDonald and Jane's. p. 124.
  • Simpson, R. W. (1995). Airlife's General Aviation. Shrewsbury: Airlife Publishing. p. 342.
  • Jane's All the World's Aircraft 1977-78. London: Jane's Yearbooks. p. 608.
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