查看“︁北美きたみ航空こうくうNAC-60”︁的てき源みなもと代だい码


{|{{Infobox aircraft begin
| name = 北美航空NAC-60
| image = NAC-60 model side view.jpg
| caption = NAC-60的模型
}}{{Infobox aircraft type|type=[[超音速客机]]|national origin={{flag|United States}}|manufacturer=[[北美航空]]|status=计划取消|number built=<!--0 completed, flight capable aircraft only -->|developed from=[[XB-70]]}}
|}'''北美航空NAC-60'''是由[[北美航空]]提出的一种[[超音速客機]]构想，其是第一个上马的美国超音速运输（NST)项目。NST计划的目的是设计生产美国自有的超音速客机 <ref name="flightglobal">{{Cite magazine|date=1964-02-13|title=THE UNITED STATES SST CONTENDERS|url=https://www.flightglobal.com/pdfarchive/view/1964/1964%20-%200377.html|magazine=FLIGHT international|page=235|access-date=2019-09-14|language=en-US|archive-date=2016-10-21|archive-url=https://web.archive.org/web/20161021071648/https://www.flightglobal.com/pdfarchive/view/1964/1964%20-%200377.html|dead-url=no}}</ref> ，并以此抗衡英法合作开发的[[协和式客机|协和客机]]和苏联开发的[[圖-144|图波列夫Tu-144]]。 但最终该设计案在与[[洛歇L-2000|洛克希德公司]]和[[波音2707|波音公司]]的竞争中败下阵来，整个项目随即被中止。

== 设计 ==
北美航空NAC-60在机头上应用了[[前翼|鸭翼]]设计，整体看上去就像是放大版的[[XB-70戰神侍婢式轟炸機|XB-70轰炸机]]。鸭翼将代替传统的升降舵为机体提供稳定性和操控性。<ref>{{Cite web|title=《大飞机》波音2707：“几乎吃掉西雅图的飞机”_航空产业_中国经济网|url=http://www.ce.cn/aero/201507/23/t20150723_6020695.shtml|accessdate=2020-08-22|author=|date=|format=|work=www.ce.cn|publisher=|language=zh-CN|archive-date=2017-09-26|archive-url=https://web.archive.org/web/20170926205132/http://www.ce.cn/aero/201507/23/t20150723_6020695.shtml|dead-url=no}}</ref>这一点与协和式客机不同，由于协和拥有专门为亚音速飞行优化的三角翼，因此并不需要鸭翼。同时，作为民用机型，NAC-60拥有比XB-70更宽的机身、更大的机翼和更加圆润的机头，并为亚音速飞行做了特别优化。

在所有NST项目的竞标方案中，NAC-60是唯一一个没有采用下垂式头锥的机型，这意味着飞行员在起降时获得的视野会更加有限。<ref>{{Citation|title=North American NAC-60 (XB-70) Valkyrie|url=https://www.flickr.com/photos/31469080@N07/16581855184/|date=2015-04-19|accessdate=2020-08-22|last=Sentinel28a1|language=en-US}}</ref>同时，NAC-60的航速也不如[[波音2707]]和其原型，事实上，在NST计划中，NAC-60的续航里程和载客量均为垫底。<ref>{{Cite web|title=The NAC-60 - America's Supersonic Jet That Never Was|url=https://simpleflying.com/the-nac-60-americas-supersonic-jet-that-never-was/|accessdate=2020-08-22|date=2020-04-23|work=Simple Flying|language=en-US|archive-date=2020-04-25|archive-url=https://web.archive.org/web/20200425182604/https://simpleflying.com/the-nac-60-americas-supersonic-jet-that-never-was/|dead-url=no}}</ref>

== 性能参数 ==
{{Aircraft specs|ref=FLIGHT international <ref name="flightglobal" />|ferry range nmi=|eng1 lbf-ab=<!-- afterburners -->

<!--
        Performance
-->|max speed kts=1520|max speed note=|max speed mach=2.65|cruise speed kts=|cruise speed note=|stall speed kts=|stall speed note=|never exceed speed kts=|never exceed speed note=|minimum control speed kts=|minimum control speed note=|range nmi=3389|range note=|ferry range note=|thrust original=|endurance=<!-- if range unknown -->|ceiling ft=|ceiling note=|g limits=<!-- aerobatic -->|roll rate=<!-- aerobatic -->|glide ratio=<!-- sailplanes -->|climb rate ftmin=|climb rate note=|time to altitude=|wing loading lb/sqft=|wing loading note=|fuel consumption lb/mi=|thrust/weight=|more performance=|eng1 kn-ab=<!-- afterburners -->|power original=|prime units?=kts
<!--
        General characteristics
-->|airfoil=<!--'''root:''' [[NACA airfoil|NACA ]]; '''tip:''' [[NACA airfoil|NACA ]]<ref name="Selig">{{cite web |last1=Lednicer |first1=David |title=The Incomplete Guide to Airfoil Usage |url=https://m-selig.ae.illinois.edu/ads/aircraft.html |website=m-selig.ae.illinois.edu |accessdate=16 April 2019}}</ref>-->|crew=4名（机长、副机长、领航员、飞行工程师）|capacity=187名乘客或{{cvt|35000|lb|0}}负载|length ft=195|length in=|length note=|span ft=121|span in=|span note=|height ft=48|height in=|height note=|wing area sqft=|wing area note=|aspect ratio=<!-- sailplanes -->|empty weight lb=|eng1 note=|eng1 name=具备[[后燃器]]的[[涡喷发动机]]|eng1 lbf=<!-- jet/rocket engines -->|eng1 kn=<!-- jet/rocket engines -->|eng1 shp=<!-- prop engines -->|eng1 hp=<!-- prop engines -->|eng1 kw=<!-- prop engines -->|eng1 type=|eng1 number=4|empty weight note=|more general=<!--
        Powerplant
-->|fuel capacity=|max takeoff weight note=|max takeoff weight lb=480000|gross weight note=|gross weight lb=|avionics=}}

== 参考文献 ==
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{{超音速客机}}
[[Category:超音速客机]]
[[Category:北美航空]]