Kestrel JP10

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Kestrel K-350 POC
Kestrel two view white2 by Truthdowser.svg
Kestrel K-350 POC
Role single engine turboprop
Manufacturer Kestrel Aircraft Company
First flight 29 July 2006
Number built 1 prototype
Unit cost
USD$3.2 million (projected)[1]

The Kestrel K-350 or Kestrel (previously the Kestrel JP10) is a high-performance single turboprop-engined all-composite six-seat aircraft.[2][3]

The proof-of-concept (POC) first flew on 29 July 2006.[4] and by April 2010, registered N352F, had logged about 260 hours.[5]

Its layout is low-wing with conventional tail. The tricycle undercarriage is fully retractable. Its construction uses composites incorporating carbon fiber. The engine that has been powering the POC is a Pratt & Whitney PT6-67A turboprop flat rated to 1,000 hp (746 kW).[2] In 2011 the company selected the Honeywell TPE331-14GR engine as first choice for the aircraft, also flat rated to approximately 1,000 hp (746 kW).[6]

The company formed in 2002 to build the aircraft was started by Richard Noble who was responsible for the team that first broke the sound barrier on land. Noble envisioned the aircraft's primary role as being part of the fleet of “air taxis” flying over Europe that provide an alternative to both commercial airlines and chartered corporate jets. Noble named his Farnborough, England based company “Farnborough Aircraft” and the design for the then designated “F1” was detailed.[7]

The name of the company has since been changed to Kestrel Aircraft Company and the aircraft’s designation was changed from “F1”, to “JP100”,[8] to “JP10”, and is now the "K-350".

Design[edit]

The carbon-fiber composite construction is claimed to allow a lower drag shape than does all-metal construction. The wing is also of carbon-fiber construction and features a high lift laminar flow design worked out mostly by aerodynamicist Dr. Gordon Robinson.[9]

The cabin features a club-seating arrangement, a toilet (or a possible seventh seat), and a baggage compartment in the pressurized area. In the cockpit, side window pillars are eliminated for a more unobstructed view for the pilot.[10]

Farnborough Aircraft formed a business alliance with Epic Aircraft to develop both companies' aircraft and as a result the POC aircraft appears similar to the Epic LT. The wing is reportedly the same, while the Kestrel’s fuselage is 20 inches longer than the Epic’s. The fuselage is also slightly wider and has a 27% greater volume.[11] The window and door arrangement on the left side of the aircraft is noticeably different.

Development[edit]

A business partnership formed in 2006 to complete the Kestrel’s development, named the Gulf Aircraft Partnership and located in the UAE, did not proceed.[8]

In 2009 Kestrel Aircraft’s Adrian Norris reported that the company was ready to freeze the design and build conformal prototypes as part of the effort to seek FAR Part 23 certification.[12]

A business relationship has been formed with Liberty Aerospace of Melbourne, Florida, United States to provide assistance with Toray carbon fiber components.[5]

In 2010, Alan Klapmeier, co-founder of Cirrus Aircraft Corporation, joined with Anthony Galley and others in the renamed Kestrel Aircraft Company.[13]

The wing is to be redesigned to improve stall characteristics and ease of construction, most likely eliminating the wing’s planform elliptical leading edge.[13]

On 23 July 2010 Kestrel Aircraft announced that they will be relocating to large, relatively newly built hangars at the soon to be closed Brunswick Naval Air Station in Brunswick, Maine. The company will receive some local financial assistance in exchange for an anticipated eventual creation of some 300 jobs. On January 17, 2012, it was announced that the aircraft will be produced in Superior, Wisconsin due to tax incentives totalling US$50 million, and that a smaller workforce would remain in Brunswick creating composite components for the aircraft.[14]

In July 2013 it was announced that the aircraft would be equipped with the Garmin G3000 avionics suite. Kestrel CEO Alan Klapmeier also stated that funding delays had slowed progress on the aircraft and that a conforming prototype was now expected to be ready in the summer of 2014, with the first customer delivery forecast for the end of 2015 or early 2016. Type certification costs were estimated at US$175M, with US$50M already spent.[15]

By September 2013 employees were reporting that the company was short of money and that salaries and insurance payments were missing or late, and that vendors had not been paid. The company indicated that development had been delayed due to lack of investment and that the first flight of a production aircraft would not occur in 2014.[16]

In early 2014 it was reported that Kestrel Aircraft had fallen months behind on loan payments to the Wisconsin Economic Development Corporation due to financing delays. It was also reported that the delay in financing had impacted hiring, causing the company to reduce its staff in Superior. The WEDC and Kestrel have agreed upon new terms that will defer the payments until November 2014.[17][18] As of July 2014, some finance had come in and employment grew at its Brunswick Landing facility, but the total amount of $100 million had not been reached.[19]

Specifications (Kestrel K-350)[edit]

Data from [20]

General characteristics

  • Crew: 1 or 2
  • Capacity: six standard/seven-eight optional
  • Length: 38 ft 5 in (11.7 m)
  • Wingspan: 44 ft 11 in (13.7 m)
  • Height: 13 ft 0 in (3.96 m)
  • Empty weight: 5,200 lb (2,359 kg)
  • Max takeoff weight: 8,500 lb (3,856 kg)
  • Fuel capacity: 319 US gal (1,208 l)
  • Main tank usable fuel: 2,152 lb (976 kg)
  • Pressurization: 7.5 psi (52 kPa)
  • Maximum cabin altitude: 8,000 feet (2,400 m) at FL 310
  • Powerplant: 1 × Honeywell TPE331-14GR turboprop, 1,000 hp (750 kW)
    (Pratt & Whitney PT6-67A turboprop engine for prototype)

Performance

  • Cruise speed: 320 kn (368 mph; 593 km/h)
  • Range: 1,300 nmi (1,496 mi; 2,408 km)
    Range assumes NBAA IFR profile with 6 Pax at Max Cruise
  • Service ceiling: 31,000 ft (9,400 m)
  • Rate of climb: 2,250 ft/min (11.4 m/s)
  • Takeoff distance: 2,500 ft (762 m)
    *Fuel consumption: 58 US gallons (220 l) per hour

See also[edit]

References[edit]

  1. ^ Mark Huber (October 2013). "Kestrel Aircraft Is Poised for the Next Phase of Growth". Retrieved 2014-12-23. 
  2. ^ a b Dave Higdon (2007-12-00). "Turboprop round-up". Retrieved 2010-07-28. 
  3. ^ Aviation Week & Space Technology: 71. 14 October 2013. 
  4. ^ flightglobal.com (July 2010). "Pictures: Farnborough Aircraft F1 Kestrel prototype performs first flight". Retrieved 2010-07-24. 
  5. ^ a b Trautvetter, Chad (2010-04-15). "Kestrel_JP10". Retrieved 2010-07-28. 
  6. ^ "Honeywell Power Selected For Kestrel Turboprop". Retrieved 2011-08-15. 
  7. ^ Matthew Stibbe (2001-04-00). "Richard Noble's New Mission". Retrieved 2010-07-28. 
  8. ^ a b Alcock, Charles (2006-01-00). "Farnborough turboprop renamed Kestrel JP100". Retrieved 2010-07-28. 
  9. ^ farnborough-aircraft (1999-11-29). "TheF1aircraft". Retrieved 2010-07-28. 
  10. ^ Collins, Peter (23 January 2007). "Flight Test: Farnborough Aircraft Kestrel - Wings of desire". Retrieved 2010-07-28. 
  11. ^ Charles Alcock & Chad Trautvetter (2006-02-00). [story_pointer=1&tx_ttnews[mode]=1 "Epic-Farnborough partnership goes awry"]. Retrieved 2010-07-28. 
  12. ^ Mark Huber (2009-10-00). [mode=1 "Farnborough Kestrel Could Be Built by Liberty"]. Retrieved 2010-07-28. 
  13. ^ a b George, Fred (25 July 2010). "Kestrel Aircraft Makes Oshkosh Debut". Retrieved 2010-07-28. 
  14. ^ Koenig, Seth (23 July 2010). "Airplane manufacturer to launch new line in Brunswick". Retrieved 2010-07-25. 
  15. ^ Bertorelli, Paul. "Garmin G3000 Selected For Kestrel". Avweb.com. Retrieved 2013-08-02. 
  16. ^ Pew, Glenn. "Kestrel Running Rough". Avweb. Retrieved 30 September 2013. 
  17. ^ Eyewitness News. "Financing Delays Impact Kestrel Project in Superior". wdio.com. Retrieved 18 June 2014. 
  18. ^ Northland's Newscenter. "Superior-based Kestrel Aircraft months behind on loan payments". NNCNOW.com. Retrieved 18 June 2014. 
  19. ^ Fishell, Darren. "Kestrel CEO: Financing Puzzle Still Coming Together, Not Complete" Bangor Daily News, 31 July 2014. Accessed: 2 September 2014.
  20. ^ "Kestrel brochure"

External links[edit]