- Variants
- Specifications (PIK-3c)
- See also
- Notes
- References
| name=PIK-3 | image=PIK-3a.JPG | caption=PIK-3a in Finnish Aviation Museum }}{{Infobox Aircraft Type | type=Sailplane | national origin=Finland | manufacturer=Polyteknikkojen Ilmailukerho | designer=Lars Norrmen and Ilkka Lounama | first flight=1950 | introduced= | retired= | status= | primary user= | number built=40 | developed from= | variants with their own articles=
}} |
The PIK-3 (Polyteknikkojen Ilmailukerho – Finnish institute of technology students flying club) was a sailplane produced in Finland in the 1950s and 60s.[1] It was designed to be a cheap and easy-to-build aircraft[2] to equip the country's gliding clubs as their standard single-seat machine.[3] It was a conventional design for its day, with a high wing and conventional empennage.[2][3] Construction was of wood throughout, skinned in plywood.[2][3] Design work commenced in 1942,[4] but the prototype did not fly until 1950.[2][3] Antti Koskinen refined the design for production as the PIK-3A and then further modified the design by replacing the flaps with air brakes, which was designated the PIK-3B.[2][3][4] By the end of the 1950s, a third modification of the original design was carried out by Olavi Roininen[4] as the PIK-3C. This had completely new wings of 15 m (49 ft 3 in) to allow it to compete in the Standard Class.[2] The prototype flew on 20 May 1958,[2][3] and the design was then modified for production by Suomen Ilmailuliitto.[3] Variants- PIK-3 – first prototype with wingspan of 13 m (47 ft 8 in)
- PIK-3A Kanttikolmonen – initial production version of PIK-3
- PIK-3B – PIK-3A with air brakes in place of flaps
- PIK-3C Kajava – PIK-3B with new wings of 15 m (49 ft 3 in) span
Specifications (PIK-3c) {{Aircraft specs
|ref=,[2] The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs du Monde[5]
|prime units?=met
|genhide=
|crew=1
|capacity=
|length m=6.6
|length ft=
|length in=
|length note= (PIK-3 – {{convert|6.5|m|ftin|abbr=on}})
|span m=15
|span ft=
|span in=
|span note= (PIK-3 – {{convert|13|m|ftin|abbr=on}})
|upper span m=
|upper span ft=
|upper span in=
|upper span note=
|mid span m=1
|mid span ft=
|mid span in=
|mid span note=
|lower span m=
|lower span ft=
|lower span in=
|lower span note=
|swept m=
|swept ft=
|swept in=
|swept note=
|dia m=
|dia ft=
|dia in=
|dia note=
|width m=
|width ft=
|width in=
|width note=
|height m=1
|height ft=
|height in=
|height note=
|wing area sqm=13.1
|wing area sqft=
|wing area note= (PIK-3 – {{convert|13|m²|sqft|abbr=on}})
|swept area sqm=
|swept area sqft=
|swept area note=
|volume m3=
|volume ft3=
|volume note=
|aspect ratio=17.1 (PIK-3 – 13)
|airfoil=Göttingen 549 (PIK-3 – Göttingen 693)
|empty weight kg=165
|empty weight lb=
|empty weight note= (PIK-3 – {{convert|135|kg|lb|abbr=on}})
|gross weight kg=
|gross weight lb=
|gross weight note=
|max takeoff weight kg=280
|max takeoff weight lb=
|max takeoff weight note= (PIK-3 – {{convert|240|kg|lb|abbr=on}})
|fuel capacity=
|lift kg=
|lift lb=
|lift note=
|more general=
|perfhide=
|max speed kmh=
|max speed mph=
|max speed kts=
|max speed note=
|max speed mach=
|cruise speed kmh=
|cruise speed mph=
|cruise speed kts=
|cruise speed note=
|stall speed kmh=55
|stall speed mph=
|stall speed kts=
|stall speed note=
|never exceed speed kmh=235
|never exceed speed mph=
|never exceed speed kts=
|never exceed speed note= (PIK-3 – {{convert|200|km/h|mph kn|abbr=on|1}})
- Rough air speed max: {{convert|145|km/h|mph kn|abbr=on|1}} (PIK-3 – {{convert|130|km/h|mph kn|abbr=on|1}})
- Aerotow speed: {{convert|140|km/h|mph kn|abbr=on|1}} (PIK-3 – {{convert|130|km/h|mph kn|abbr=on|1}})
- Winch launch speed: {{convert|110|km/h|mph kn|abbr=on|1}} (PIK-3 – {{convert|100|km/h|mph kn|abbr=on|1}})
- Terminal velocity: with full air-brakes at max all-up weight {{convert|200|km/h|mph kn|abbr=on|0}} (PIK-3 – {{convert|180|km/h|mph kn|abbr=on|1}})
|minimum control speed kmh=
|minimum control speed mph=
|minimum control speed kts=
|minimum control speed note=
|range km=
|range miles=
|range nmi=
|range note=
|combat range km=
|combat range miles=
|combat range nmi=
|combat range note=
|ferry range km=
|ferry range miles=
|ferry range nmi=
|ferry range note=
|endurance=
|ceiling m=
|ceiling ft=
|ceiling note=
|g limits=+5 -2.5 (PIK-3 – +4 -2)
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=
|climb rate note=
|time to altitude=
|sink rate ms=0.61
|sink rate ftmin=
|sink rate note=at {{convert|65|km/h|mph kn|abbr=on|1}}) (PIK-3 – 0.76 m/s (149.6 ft/min) at {{convert|61|km/h|mph kn|abbr=on|1}})
|lift to drag=30:1 at {{convert|75|km/h|mph kn|abbr=on|1}}) (PIK-3 – 25:1 at {{convert|72|km/h|mph kn|abbr=on|1}})
|wing loading kg/m2=21.4
|wing loading lb/sqft=
|wing loading note=(PIK-3 – 18.5 kg/m² (3.79 lb/sqft)
|disk loading kg/m2=
|disk loading lb/sqft=
|disk loading note=
|fuel consumption kg/km=
|fuel consumption lb/mi=
|power/mass=
|thrust/weight=
|more performance=
}}See also{{aircontent
|see also=
|related=
|similar aircraft=Schleicher Ka-6
|lists=
}}Notes1. ^Taylor 1989, p.726
2. ^1 2 3 4 5 6 7 Coates 1978, p.24
3. ^1 2 3 4 5 6 Hardy 1982, p.74
4. ^1 2 "PIK-sarjan lentokoneet"
5. ^{{cite book|last=Shenstone|first=B.S.|title=The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs dans Le Monde|year=1958|publisher=Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue|location=Zurich|pages=9–13|edition=1st |author2=K.G. Wilkinson |author3=Peter Brooks|language=English, French, German}}
References{{commons category|PIK-3}}- {{cite book|last=Shenstone|first=B.S.|title=The World's Sailplanes:Die Segelflugzeuge der Welt:Les Planeurs dans Le Monde|year=1958|publisher=Organisation Scientifique et Technique Internationale du Vol a Voile (OSTIV) and Schweizer Aero-Revue|location=Zurich|pages=9–13|edition=1st |author2=K.G. Wilkinson |author3=Peter Brooks|language=English, French, German}}
- {{cite book |last= Hardy |first= Michael |title=Gliders and Sailplanes of the World |year=1982 |publisher=Ian Allan |location=Shepperton }}
- {{cite book |last= Coates |first= Andrew |title=Jane's World Sailplanes and Motor Gliders |year=1978 |publisher=MacDonald and Jane's |location=London }}
- {{cite web |title=PIK-sarjan lentokoneet |work=Polyteknikkojen Ilmailukerho website |url=http://pik.tky.fi/joomla/index.php?option=com_content&task=view&id=43&Itemid=108 |accessdate=2009-01-08 }}
- {{cite book |last= Taylor |first= Michael J. H. |title=Jane's Encyclopedia of Aviation |year=1989 |publisher=Studio Editions |location=London}}
{{PIK aircraft}} 3 : Finnish sailplanes 1950–1959|PIK aircraft|Glider aircraft |