The PIK-11 Tumppu ("Mitten") was a single-seat, single-engine sport aircraft developed in Finland in the 1950s.[1] It was a low-wing, cantilever monoplane of conventional design with an enclosed cockpit and fixed, tailwheel undercarriage.[2] It was to be the first powered aircraft produced by Polyteknikkojen Ilmailukerho,[1][a] with the objective being building an aircraft for club use that was cheap to build and easy to fly.[2]
| PIK-11 Tumppu | |
|---|---|
| |
| PIK-11 Tumppu in Finnish Aviation Museum | |
| Role | Sport aircraft |
| National origin | Finland |
| Manufacturer | Polyteknikkojen Ilmailukerho |
| First flight | 15 March 1953 |
| Number built | 4 |
Design work was started in 1948 by Kai Mellen and Ilkka Lounanmaa under the direction of Professor Arvo Ylinen.[2] The first of four machines made its first flight on 15 March 1953.[2] The prototype is preserved at the Finnish Aviation Museum,[4] and another example was still listed on the Finnish Civil Aviation Authority registry in 2008.[5]
In the early 21st century, a flying replica was under construction, to be powered by a Rotax 912 engine.[6]
Specifications
editData from Jane's all the World's Aircraft 1955-56[7] & [8]
General characteristics
- Crew: 1
- Length: 5.5 m (18 ft 1 in)
- Wingspan: 8 m (26 ft 3 in)
- Height: 1.65 m (5 ft 5 in) tail down
- Empty weight: 238 kg (525 lb)
- Gross weight: 373 kg (822 lb)
- Powerplant: 1 × Continental A65-8 4-cyl. horizontally-opposed air-cooled piston engine, 48 kW (65 hp)
Performance
- Maximum speed: 220 km/h (140 mph, 120 kn) at sea level
- Cruise speed: 170 km/h (110 mph, 92 kn) at sea level
- Landing speed: 80 km/h (50 mph; 43 kn)
- Never exceed speed: 280 km/h (170 mph, 150 kn)
- Range: 700 km (430 mi, 380 nmi)
- g limits: +5.5 -1.5
- Rate of climb: 5.5 m/s (1,080 ft/min) initial
- Time to altitude: 1,000 m (3,300 ft) in 3 minutes 10 seconds, 5,000 m (16,000 ft) in 31 minutes
- Wing loading: 41 kg/m2 (8.4 lb/sq ft)
- Power/mass: 0.13 kW/kg (0.0787 hp/lb)
Take-off run: 300 m (980 ft) to clear 15 m (50 ft)
Notes
edit- ^ A Grunau Baby sailplane had been converted into a motorglider in 1949 as the PIK-10 Moottoribaby.[3]
- ^ a b Taylor 1989, p.726
- ^ a b c d "PIK-sarjan lentokoneet"
- ^ Green & Pollinger 1965, p. 33
- ^ "Item Collection: Aircraft"
- ^ Summary of the Finnish Aircraft Register 2008, Part I page 44
- ^ <"Lentokoneen rakennusprojekti PIK-11 'Tumppu'"
- ^ Bridgman, Leonard (1955). Jane's all the World's Aircraft 1955-56. London: Jane's all the World's Aircraft Publishing Co. Ltd.
- ^ "Lentokoneen rakennusprojekti PIK-11 "Tumppu"" (in Finnish). Retrieved 20 April 2014.
References
edit
- "Aircraft". The Finnish Aviation Museum website. Retrieved 2009-01-12.
- Green, William; Pollinger, Gerald (1965). The Aircraft of the World (3rd ed.). London: Macdonald & Co. (Publishers) Ltd.
- "Lentokoneen rakennusprojekti PIK-11 'Tumppu'". Vaasan Lentokerho website. Retrieved 2009-01-12.
- "PIK-sarjan lentokoneet". Polyteknikkojen Ilmailukerho website. Retrieved 2009-01-12.
- "Summary of the Finnish Aircraft Register" (PDF). Finnish Civil Aviation Authority website. Archived from the original (PDF) on 2011-07-20. Retrieved 2009-01-12.
- Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.