| 词条 | MacDonald S-20 | |||||||||||||||
| 释义 |
The MacDonald S-20 is a single-seat sport aircraft that was designed in the United States in the early 1970s and marketed for home building.[1] The aircraft is a conventional, low-wing cantilever monoplane with fixed tailwheel undercarriage and an open cockpit.[2] Construction is of metal throughout, with a forward fuselage of welded steel tube construction, with the rear fuselage built up of aluminium bulkheads and longerons. The wings and tail are also of aluminium construction, and the entire aircraft is skinned in the same material. Pop rivets are used extensively to simplify construction.[2] The S-20 designation was applied to the prototype (registration N106AB), while aircraft built from the plans were designated S-21.[2] Specifications (S-20){{aerospecs|ref=Jane's All the World's Aircraft 1977–78, 547 |met or eng?=eng |crew=One pilot |capacity= |length m=5.64 |length ft=18 |length in=6 |span m=7.62 |span ft=25 |span in=0 |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=1.60 |height ft=5 |height in=3 |wing area sqm=8.7 |wing area sqft=94 |swept area sqm= |swept area sqft= |rot area sqm= |rot area sqft= |volume m3= |volume ft3= |aspect ratio= |wing profile= |empty weight kg=206 |empty weight lb=456 |gross weight kg=326 |gross weight lb=720 |lift kg= |lift lb= |eng1 number=1 |eng1 type=converted Volkswagen automotive engine |eng1 kw=40 |eng1 hp=53 |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=177 |max speed mph=110 |max speed mach= |cruise speed kmh= |cruise speed mph= |stall speed kmh= |stall speed mph= |range km=404 |range miles=251 |endurance h= |endurance min= |ceiling m= |ceiling ft= |g limits= |roll rate= |glide ratio= |climb rate ms=4.3 |climb rate ftmin=850 |sink rate ms= |sink rate ftmin= |armament1= |armament2= |armament3= |armament4= |armament5= |armament6= }}{{aircontent |see also= |related= |similar aircraft= |lists= }} Notes1. ^Taylor 1989, 620 2. ^1 2 Jane's All the World's Aircraft 1977–78, 546 References
4 : United States sport aircraft 1970–1979|Homebuilt aircraft|Low-wing aircraft|Aircraft first flown in 1972 |
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