| 词条 | Viper Aircraft ViperJet | ||||||||||||||
| 释义 |
The Viper Aircraft ViperJet is a small homebuilt jet aircraft by Viper Aircraft Corporation. It is a conventional, low-wing monoplane with swept wings and tail and two seats in tandem under a bubble canopy. The jet intakes are located at the sides of the fuselage and the tricycle undercarriage is retractable. Construction throughout is of composite materials.[1][2] DevelopmentOriginally conceived to use a piston engine driving a five- or six-blade pusher propeller, brothers Scott and Dan Hanchette commenced work on the prototype, then known as the ViperFan,[3] in February 1996.[4] However, concerns about the difficulty and cost associated with eliminating vibration from the drivetrain led the Hanchettes to choose turbojet propulsion instead, and they installed a Turbomeca Marboré engine in place of the Continental flat-6 they had originally envisaged as a powerplant.[3] The Viperjet prototype flew late in October 1999.[1] and made its public debut at EAA AirVenture Oshkosh in 2000.[5] The Hanchette brothers, however, were unhappy with both the low power[6] and the high fuel consumption[7] of the Turbomeca engine, and soon swapped it for a General Electric T58 turboshaft engine with the power turbine removed,[7] turning it into a turbojet. While this worked, it still did not produce as much thrust as the Hanchettes hoped for, and eventually, they selected the General Electric J85.[7] With this engine producing around four times the thrust of the previous powerplants tested in the Viper, the Hanchettes substantially redesigned the aircraft, dubbing the J85-powered version the MKII.[7] The prototype was dismantled and rebuilt, with parts of the canopy and fuselage center section all that remained of the original design.[7] The slightly larger MKII also features a pressurized cabin,[8] nearly three times the fuel tankage,[9] stronger undercarriage,[9] and optional tip tanks.[9] The MKII prototype flew on 12 June 2005[10] and Viper Aircraft offered replacement MKII parts to all customers who had purchased kits of the original version,[7] now dubbed the MKI. In 2006, the base MKII kit cost US$182,000, but since builders can purchase additional components already pre-made by Viper Aircraft, customers spent an average of $350,000 on their kits.[6] They would then have to spend approximately another $300,000[6] and around 3,000 to 3,500 hours to complete the aircraft.[4] The company also offers customers a builder assistance program to help them assemble the major airframe components and a training program to help them learn to fly their ViperJet once it is complete. Zero Gravity Builders[11] provides builder assistance for the ViperJet MKII, ViperJet LXR and Viper FanJet.[12] Viper Aircraft had sold 21 kits by September 2006.[4] In 2008, Viper Aircraft announced an enlarged, turbofan-powered follow-on design as the Viper Aircraft FanJet. The company has also proposed a military trainer version of the ViperJet, as well as a UAV version.[13] Operational historyBy October 2012 five examples had been registered in the United States with the Federal Aviation Administration.[14] Specifications (MKII, preliminary specifications){{aerospecs|ref=White 2006, p.13 |met or eng?=eng |crew=One pilot |capacity=2 (1 pilot & 1 passenger) |length m=7.80 |length ft=25 |length in=6 |span m=8.48 |span ft=27 |span in=10 |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= |height ft= |height in= |wing area sqm= |wing area sqft= |swept area sqm= |swept area sqft= |rot area sqm= |rot area sqft= |volume m3= |volume ft3= |aspect ratio= |wing profile= |empty weight kg=1,452 |empty weight lb=3,200 |gross weight kg=2,320 |gross weight lb=5,100 |lift kg= |lift lb= |eng1 number=1 |eng1 type=General Electric CJ-610 |eng1 kw= |eng1 hp= |eng1 kn=12.7 |eng1 lbf=2,850 |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= 804-845 |max speed mph= 500-525 |max speed mach= |cruise speed kmh=603 |cruise speed mph=375 |stall speed kmh=130 |stall speed mph=80 |range km=1,480 |range miles=920 |endurance h= |endurance min= |ceiling m= 10,500 |ceiling ft= 35,000 |g limits= |roll rate= |glide ratio= |climb rate ms=61 |climb rate ftmin=12,000 |sink rate ms= |sink rate ftmin= |armament1= |armament2= |armament3= |armament4= |armament5= |armament6= }} ReferencesNotes1. ^1 {{Citation | title = ViperJet kit aircraft makes maiden flight | url = https://www.flightglobal.com/news/articles/viperjet-kit-aircraft-makes-maiden-flight-58059/ | newspaper = Flight international | date = 10 November 1999 | publisher = Flight global | quote = The composite ViperJet…}}. 2. ^{{Citation | last1 = Bayerl | first1 = Robby | first2 = Martin | last2 = Berkemeier | title = World Directory of Leisure Aviation | year = 2011–2012 | page = 126 | publisher = WDLA | place = Lancaster, UK | ISSN = 1368-485X|display-authors=etal}} 3. ^1 Freeze 2005, p. 10C 4. ^1 2 Saywers 2006, p. 14 5. ^Hitchman 2000, p. 44. 6. ^1 2 Saywers 2006, p. 1 7. ^1 2 3 4 5 Freeze 2005, p.11C 8. ^Joshi 2007, p. B6 9. ^1 2 White 2006, p. 11. 10. ^{{Harvnb | Viper | 2005}}. 11. ^{{Citation | url = http://www.zerogravitybuilders.com/ | title = Zero Gravity Builders Studio LLC}}. 12. ^White 2006, p. 12 13. ^White 2006, p. 13 14. ^{{cite web|url = http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=VIPERJET&PageNo=1|title = Make / Model Inquiry Results|accessdate = 27 October 2012|last = Federal Aviation Administration|date = 27 October 2012}} Bibliography{{refbegin}}
External links{{Commons category|Viperjet}}
6 : Viper Aircraft|United States sport aircraft 1990–1999|Homebuilt aircraft|Single-engined jet aircraft|Low-wing aircraft|Aircraft first flown in 1999 |
||||||||||||||
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。