Sport Jet II

Last updated

Sport Jet II
Role Amateur-built aircraft
National origin United States
Manufacturer Excel Jet
Sport-Jet, Limited
DesignerBob Bornhofen
First flightMay 12, 2006 [1]
StatusDevelopment ended (2015)
Number built1 [2]

The Sport Jet II was an American amateur-built aircraft that was under development by Sport-Jet, Limited. The Sport Jet was designed by Robert Bornhofen who licensed the intellectual property to Excel Jet. The aircraft was intended to be supplied as a kit for amateur construction. [3] [4] The first Sport Jet built crashed on takeoff after logging 23.8 hours of flight time. [5]

Contents

Design and development

The Sport Jet II featured a cantilever mid-wing, a four-seat enclosed and pressurized cabin, retractable tricycle landing gear, a T-tail and a single jet engine. [3] [4]

The aircraft fuselage was made from composites, with the wing fashioned from aluminum sheet. Its 34 ft (10.4 m) span employed a NACA 64-415 airfoil, had an area of 165 sq ft (15.3 m2) and mounted flaps. The standard engine recommended was the 2,200 lb (998 kg) thrust Pratt & Whitney Canada JT15D turbofan, although when under development by Excel Jet a Williams FJ33 4A was used. The engine was mounted in the aft fuselage and was provided air by two intakes, one on each side of the fuselage. [3] [4] [6] [7]

The prototype aircraft's Federal Aviation Administration aircraft registration was cancelled on 4 June 2013. [8] By May 2017 the company website had been blanked and it is likely that the project has been cancelled. [9] [10]

Accident

On 22 June 2006 at 0953 hours local time, the Sport Jet prototype was destroyed in a crash just after take-off at Colorado Springs Municipal Airport (COS). According to reports, the plane lifted approximately fifteen feet into the air before rotating left to 90° of bank, at which point the left wing contacted the ground, causing the plane to cartwheel off the runway before coming to rest 454 feet from the initial point of impact. The National Transportation Safety Board (NTSB) investigation concluded it could find no cause for the accident, focusing mostly on disproving the pilot and owner's assertions that the crash was caused by wake turbulence. The NTSB used NASA's APA program to compute the location and strength of the wake turbulence the previous plane (a de Havilland Dash-8-200) would have left behind, and found there was no contributing wake involved in the crash. [5]

Excel-Jet filed a lawsuit against the FAA stating that the crash was a direct result of the wake turbulence from the DHC-8, and that the NTSB findings were incorrect. Bornhofen believed the FAA air traffic control clearance of the Sport-Jet for take-off was in violation of the FAA's regulations "and caused it to crash", according to lawyer Frank Coppola. [11] At the conclusion of the case, US District Judge Kathryn H. Vratil found that "in electing not to apply the three-minute separation interval, [the air traffic controller] did not breach her duty of care or violate FAA orders. Furthermore, even if a breach occurred, a wake turbulence encounter did not cause the accident. Therefore the Court finds in favor of the United States of America." A judgment was entered in favor of the defendant and the case was closed on 17 June 2010. [12]

Specifications (Sport Jet II)

Data from Bayerl and Sport-Jet, Limited [3] [7]

General characteristics

Performance

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References

  1. ↑ "Maverick Jet Creator Witnesses First Flight Of New Sport-Jet VLJ". Airport Journals. June 1, 2006.
  2. ↑ Federal Aviation Administration (September 30, 2012). "Sport-Jet Make / Model Inquiry Results" . Retrieved September 30, 2012.
  3. 1 2 3 4 Bayerl, Robby; Martin Berkemeier; et al: World Directory of Leisure Aviation 2011–12, page 101. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X
  4. 1 2 3 Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015–16, page 127. Flying Pages Europe SARL, 2015. ISSN   1368-485X
  5. 1 2 "National Transportation Safety Board investigation DEN06LA090". NTSB. June 29, 2006.
  6. ↑ Lednicer, David (2010). "The Incomplete Guide to Airfoil Usage". Archived from the original on April 20, 2010. Retrieved January 3, 2012.
  7. 1 2 Sport-Jet, Limited. "Technical". Archived from the original on December 6, 2014. Retrieved September 30, 2012.
  8. ↑ Federal Aviation Administration (May 26, 2017). "N-Number Inquiry Results N350SJ" . Retrieved May 26, 2017.
  9. ↑ "SportJetAir Home Page". sportjetair.com. Retrieved May 26, 2017.
  10. ↑ Sport-Jet, Ltd (2013). "Sport-Jet, Ltd: Official Site of Sport Jet II". sportjetair.com. Archived from the original on July 20, 2013. Retrieved September 28, 2022.
  11. ↑ "Excel-Jet sues FAA for Sport-Jet crash". General Aviation News. November 9, 2007. Retrieved May 4, 2018.
  12. ↑ United States District Court for the District of Colorado, Civil Action No. 07-cv-02181-KHV-BNB, EXCEL-JET, LTD v. THE UNITED STATES OF AMERICA
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