Engineering:Pazmany PL-4

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PL-4A
Role Amateur-built aircraft
National origin United States
Manufacturer Pazmany Aircraft Corporation/Homebuilt
Designer Ladislao Pazmany
First flight 12 July 1972
Number built more than 50

The Pazmany PL-4A is a single-seat, single-engine sport aircraft developed in the United States[1] and first flown in 1972.[2] It is marketed for homebuilding from plans, and 686 sets had sold by 1985.[2] The PL-4A is a conventional, low-wing cantilever monoplane with an enclosed cabin and fixed, tailwheel undercarriage.[2][3] The design features a T-tail, chosen to facilitate folding the wings.[3][4] Construction throughout is of metal, using standard extruded sections for the longerons[2] and pop rivets as the basic fastener. The standard powerplant is a Volkswagen air-cooled engine of 60 hp (45 kW)[5][6] Construction time is estimated to be around 1,000–1,500 hours.[7][8]

The PL-4A won the "Outstanding New Design" and "Outstanding Contribution to Low-Cost Flying" awards at the 1972 EAA Fly-In.[9][10] By 2000 more than 50 had been built and flown.[11]

Variants

Pazmany PL-4A
Standard single seater, normally powered by a 60 hp (45 kW) Volkswagen air-cooled engine with V-belt drive reduction.[12]
Denight 100 D2 Special
Modified PL4A design to seat two side by side. Main differences are an increase in length by 17 in (450 mm) and in fuselage width by 12 in (305 mm), a more powerful 115 hp (86 kW) Avco Lycoming O-235 flat-four engine and a conventional tail. Maximum take-off weight is 1,250 lb (567 kg).[13]

Specifications

Data from Jane's All the World's Aircraft 1985–86, p.608

General characteristics

  • Crew: One pilot
  • Length: 16 ft 7 in (5.04 m)
  • Wingspan: 26 ft 8 in (8.13 m)
  • Height: 5 ft 8 in (1.73 m)
  • Wing area: 89 sq ft (8.3 m2)
  • Empty weight: 578 lb (262 kg)
  • Gross weight: 850 lb (385 kg)
  • Powerplant: 1 × Converted Volkswagen air-cooled engine , 50 hp (38 kW)

Performance

  • Maximum speed: 125 mph (201 km/h, 109 kn)
  • Range: 340 mi (545 km, 300 nmi)
  • Service ceiling: 13,000 ft (3,960 m)
  • Rate of climb: 650 ft/min (3.3 m/s)

References

Notes

  1. ↑ Taylor 1989, p.717
  2. ↑ 2.0 2.1 2.2 2.3 Jane's All the World's Aircraft 1985–86, p.608
  3. ↑ 3.0 3.1 Markowski 1979, p.241
  4. ↑ "Pazmany's PL-4 Features 'T'-tail and VW engine" 1972, p.40
  5. ↑ Markowski 1979, p.245
  6. ↑ "Pazmany's PL-4 Features 'T'-tail and VW engine" 1972, p.43
  7. ↑ Pazmany 1973, p.39
  8. ↑ Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011-12, page 114. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  9. ↑ Markowski 1979, p.246
  10. ↑ Dwiggins 1973, p.78
  11. ↑ Simpson 2001, p.418
  12. ↑ Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, page 121. Flying Pages Europe SARL, 2015. ISSN 1368-485X
  13. ↑ Jane's All the World's Aircraft 1984/5 p.571

Bibliography

  • Dwiggins, Don (April 1973). "Pazmany VW-Engine Homebuilt". Plane & Pilot: 76–79. 
  • Taylor, John W. R. (1984). Jane's All the World's Aircraft 1984-1985. London: Jane's Publishing Co.. ISBN 0710608012. 
  • Jane's All the World's Aircraft 1985–86. London: Jane's Publications. https://archive.org/details/janesfightingshi8586shar. 
  • Markowski, Mark (1979). The Encyclopedia of Homebuilt Aircraft. Blue Ridge Summit, Pennsylvania: TAB Books. ISBN 0-8306-2256-X. 
  • Pazmany, Ladislao (March 1973). "The Pazmany PL-4A is flying". Sport Aviation: 32–39. 
  • "Pazmany's PL-4 Features 'T'-tail and VW engine". Sport Flying: 40–43. October 1972. 
  • Simpson, Rod (2001). Airlife's World Aircraft. Shrewsbury: Airlife Publishing Ltd. ISBN 978-1-84037-115-4. 
  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. ISBN 0-7106-0710-5. 



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