| 词条 | SZD-49 Jantar K | |||||||||||||||
| 释义 |
The SZD-49 Jantar K was a 15m Class glider designed and built in Poland in 1977.[1] DevelopmentAfter the FAI Standard class rules had been created and then modified in the early 1970s the FAI decided to add a new 15m class, for gliders with a maximum span of 15m but no other restrictions other than airbrakes limiting the speed to Vne or less. Władysław Okarmus set about designing a new wing, with flaps, for use with the SZD-48-3 fuselage, the resulting off-spring was named SZD-49 Jantar K. First flight of the prototype, (SP-2583, X-143), took place at Bielsko in October 1978. All was not well with the SZD-49 during the flight trials and further development was abandoned. The sole prototype was later used as a live teaching aid for advanced students and was successfully modified twice with some success by groups of students from Warsaw University of Technology. Constructed almost entirely from Galssfibre using epoxy resin, the SZD-49 had a welded steel tube centre section truss to accept the loads from the wings, undercarriage and towing hook. A one piece forward opening canopy with integral glare-shield gave access to the cockpit for entry/egress and maintenance. The wings are fitted with full span flaps with drooping ailerons as well as single leaf airbrakes extending from top and bottom surfaces of the wing. Ailerons are driven through a patented linkage entirely enclosed inside the wing.[1] A standard instrument fit and an oxygen system were provided by the manufacturer. Specifications (SZD-49 Jantar K){{aerospecs|ref=[1] |met or eng?=met ||crew=1 |capacity= |length m=6.85 |length ft=22 |length in=6 |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=21.1:1 |wing profile=NN 8 |empty weight kg=265 |empty weight lb=584 |gross weight kg=without ballast 385 (849 lb) with ballast 535 |gross weight lb=1,179.5 |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= |stall speed mph= |range km= |range miles= |endurance h= |endurance min= |ceiling m= |ceiling ft= |g limits=+ 5.3 / -2.65 |roll rate= |glide ratio=40 @ 97 km/h without ballast, 123 km/h with ballast |climb rate ms= |climb rate ftmin= |sink rate ms=@ (320kg/75 km/h) 0.6 m/s (118 ft/min), @(420 kg/ 86km/h) 0.69 |sink rate ftmin=136 |armament1= |armament2= |armament3= |armament4= |armament5= |armament6= }} See also{{aircontent|see also= |related= |similar aircraft=
|lists= }} References{{commons category|SZD gliders}}1. ^1 2 http://www.piotrp.de/SZYBOWCE/pszd49.htm {{refbegin}}{{refend}}{{Polish gliders}} 3 : Sailplanes|Polish sailplanes 1970–1979|SZD aircraft |
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