1. Design and development

2. Accident

3. Specifications (Sport Jet II)

4. References

5. External links

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.^[2][3] The first Sport Jet built crashed on takeoff after logging 23.8 hours of flight time.^[4]

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.^[2][3]

The aircraft fuselage was made from composites, with the wing fashioned from aluminum sheet. Its {{convert|34|ft|m|1|abbr=on}} span employed a NACA 64-415 airfoil, had an area of {{convert|165|sqft|m2|abbr=on}} and mounted flaps. The standard engine recommended was the {{convert|2200|lb|kg|0|abbr=on}} 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.^[2][3][5][6]

The prototype aircraft's Federal Aviation Administration aircraft registration was cancelled on 4 June 2013.^[7] By May 2017 the company website had been blanked and it is likely that the project has been cancelled.^[8]

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.^[4]

Excel-Jet filed a lawsuit against the FAA stating that the crash was a direct result of the wake turbulence from the DH-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.^[9] The result of the lawsuit is unknown, but the suit does not appear to have been upheld by the court.

Specifications (Sport Jet II)

|genhide=
|crew=one
|capacity=four-five passengers
|length m=
|length ft=30
|length in=
|length note=
|span m=
|span ft=34
|span in=
|span note=
|height m=
|height ft=9.6
|height in=
|height note=
|wing area sqm=
|wing area sqft=165
|wing area note=
|aspect ratio=
|airfoil=NACA 64-415
|empty weight kg=
|empty weight lb=2900
|empty weight note=
|gross weight kg=
|gross weight lb=5250
|gross weight note=
|fuel capacity={{convert|220|u.s.gal}}
|more general=

|eng1 number=1
|eng1 name=Pratt & Whitney Canada JT15D
|eng1 type=turbofan
|eng1 kn=
|eng1 lbf=2200
|eng1 note=

|perfhide=
|max speed kmh=
|max speed mph=
|max speed kts=420
|max speed note=
|cruise speed kmh=
|cruise speed mph=
|cruise speed kts=380
|cruise speed note=
|stall speed kmh=
|stall speed mph=
|stall speed kts=67
|stall speed note=
|never exceed speed kmh=
|never exceed speed mph=
|never exceed speed kts=
|never exceed speed note=
|range km=
|range miles=1400
|range nmi=
|range note=
|endurance=
|ceiling m=
|ceiling ft=28000
|ceiling note=
|g limits=
|roll rate=
|glide ratio=
|climb rate ms=
|climb rate ftmin=3000
|climb rate note=
|time to altitude=
|sink rate ms=
|sink rate ftmin=
|sink rate note=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=30
|wing loading note=
|power/mass=
|thrust/weight=
|more performance=
|avionics=
}}

References

External links

• {{Official website|http://sportjetair.com/}}

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