| 词条 | SZD-41 Jantar Standard | |||||||||||||||
| 释义 |
The SZD-41 Jantar Standard was a Standard Class glider designed and produced in Poland from 1973. DevelopmentDevelopment of the SZD-41 Jantar Standard was relatively quick due to using the fuselage and tail unit of the SZD-38 Jantar 1 and fitting 15 m span wings complying with the Standard class specification. The prototype SZD-41, limited to 235 km/h, no winch launching or aerobatics, first flew in October 1973 piloted by Adam Zientek. The two prototypes, SZD-41-1 SP-2685 (construction number X-110) and SZD-41-2 SP-2686 (c/n X-111), were entered in the 1974 World Gliding Championships at Waikerie in Australia, taking 3rd and 7th places in the Standard class. In 1976, at Reyskale in Finland, SZD-41As took 4th, 6th and 18th places in the World Gliding Championships Standard Class. Competition results and measured flight tests revealed that the SZD-41A was more or less the equal of direct competitors, such as the Schempp-Hirth Standard Cirrus and Schleicher ASW 19.[1] Unfortunately, the production methods left the epoxy laminates prone to shrinkage which drastically affected performance due to the sensitive aerodynamics of the aerofoil sections used.[1] The SZD-41A Jantar Standard was built primarily of Fibreglass-Epoxy resin composite with local strengthening from welded steel tube in the fuselage centre-section, foam ribs in the wings and plywood at equipment mounting points. The skin was composed of fibreglass laminates laid up in moulds to attain accurate profiles. The monowheel manually retractable landing gear hung from the steel tube centre section structure which also mounted the towing hook and wing attachments. Large plate style airbrakes aft of the mainspar extend from the top and bottom surfaces, with the gaps sealed by spring-loaded covers when closed, also operating the disk brake on the monowheel at full extension. The cantilever fibreglass-epoxy tailplane is attached to the top of the fin, trimming of the elevator was achieved by spring loading the control stick and adjusting the neutral loading position. 80 litres (later 100) of water ballast could be carried in plastic tanks in the wings and jettisoned as required. The semi-reclining seat is in a comfortable cockpit enclosed by a two-part canopy, the front part fixed and the rear hinged to open rearwards for entry/exit. After modifications to remove restrictions on the prototypes and improvements required after flight testing, production of the SZD-41A and SZD-41B Jantar Standard commenced, continuing till 1978 when 159 had been built, many of which were exported worldwide. In common with many SZD products, the aircraft was delivered with a full range of basic instruments from Polish suppliers, which led to the famous punch-line: "There I was, 50ft, inverted, nothing on the clock but the makers' name, and that was in (expletive redacted) Polish" used in Gliding Club Bars throughout the world to humourise recovery from perilous situations. Variants
Specifications (SZD-41A Jantar Standard){{aerospecs|ref=http://www.piotrp.de/SZYBOWCE/pszd41.htm |met or eng?=met |crew=1 |capacity= |length m=7.11 |length ft=23 |length in=4 |span m=15 |span ft=49 |span in=2 ½ |swept m= |swept ft= |swept in= |rot number= |rot dia m= |rot dia ft= |rot dia in= |dia m= |dia ft= |dia in= |width m= |width ft= |width in= |height m=1.51 |height ft=4 |height in=11 |wing area sqm=10.66 |wing area sqft=114.75 |swept area sqm= |swept area sqft= |rot area sqm= |rot area sqft= |volume m3= |volume ft3= |aspect ratio=21.1 |wing profile=NN 8 |empty weight kg=244 |empty weight lb=538 |gross weight kg=360 kg (794 lb), with ballast 460 |gross weight lb=1,014 |lift kg= |lift lb= |eng1 number= |eng1 type= |eng1 kw= |eng1 hp= |eng1 kn= |eng1 lbf= |eng1 kn-ab= |eng1 lbf-ab= |eng2 number= |eng2 type= |eng2 kw= |eng2 hp= |eng2 kn= |eng2 lbf= |eng2 kn-ab= |eng2 lbf-ab= |max speed kmh=250 |max speed mph=155 |max speed mach= |cruise speed kmh= |cruise speed mph= |stall speed kmh=with ballast 80km/h (50 mph), without ballast 68 |stall speed mph=42.25 |range km= |range miles= |endurance h= |endurance min= |ceiling m= |ceiling ft= |g limits=
|roll rate= |glide ratio=38 @ 92 km/h (57 mph) no ballast, 38 @ 105.2 km/h (65 mph) with ballast |climb rate ms= |climb rate ftmin= |sink rate ms=with ballast 0.69 m/s (136 ft/min), without ballast 0.6 |sink rate ftmin=118 |armament1= |armament2= |armament3= |armament4= |armament5= |armament6= }}{{aircontent |see also= |related= |similar aircraft= |lists= }} References1. ^1 Simons, Martin. Sailplanes 1965-2000 2nd revised edition. EQIP Werbung und Verlag G.m.b.H.. Königswinter. 2005. {{ISBN|3-9808838-1-7}} {{refbegin}}2. ^http://www.piotrp.de/SZYBOWCE/pszd41.htm
External links{{commons category|SZD gliders}}
2 : SZD aircraft|Polish sailplanes 1970–1979 |
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