Aviation Technology Group, Inc. announced the following design changes to its Javelin aircraft: an increase in wing size, enhancement of wing lift devices, and improvement to the canopy opening mechanism. These constitute the last major design changes to the Javelin, freezing its configuration to enable suppliers to start producing the production airframe parts.

To achieve a lower stall speed, resulting in slower and safer approaches and landings, designers have increased the wing span by 1.85 feet and the wing area by 29 square feet. The wings were further enhanced with Fowler flaps and leading edge flaps. Aerodynamicists expect these wing improvements to yield a 5 to 7-knot decrease in stall speed, lowering Javelin’s stall speed to 90 knots.

Engineers also implemented design improvements to the Javelin's canopy system. Under advisement from ATG’s Pilot-vehicle Interface Working Group, designers selected an aft-hinge canopy opening mechanism to replace the less conventional side-opening arrangement. Removal of the side hinges gives the new canopy a more aerodynamic profile, enables ground operations with an open canopy in winds up to 40 knots, and allows Javelin pilots to taxi with improved visibility and cockpit ventilation. The new canopy also features a gas spring and electric motor combination, which allows pilots to open and close the canopy with the push of a button.

Changes to the wing and canopy have resulted in a nominal weight increase and a small decrease the Javelin’s cruise speed to 500 knots. After a thorough review and acceptance by ATG engineering staff and executive management, the overall benefits of these final design changes were confirmed by a series of wind tunnel tests conducted at the University of Washington Aeronautics Laboratory in May.

“ATG has always emphasized safety as a priority,” noted Charlie Johnson, president of ATG. “And, lower stall speed provides an extra margin of safety during critical takeoff and landing phases.”

About ATG: Incorporated in 2000, ATG is dedicated to the design, development and production of the Javelin executive jet and its derivatives for government markets. Initial customer deliveries of the FAA-certified Javelin are slated for 2008. For photographs and additional information go to www.avtechgroup.com.

FACT SHEET: Javelin executive jet (Mk-10)
Engines: two 1,800-pound thrust, turbofan Williams International FJ33
Seating capacity: two, tandem
Cabin width:
Canopy interior sills: 28.5 inches
Cockpit interior width at elbows: 36 inches
Maximum outside cabin width: 40 inches
Maximum gross weight: 6,900 pounds
Empty weight: 4,655 pounds
Wing span: 25.1 feet
Length: 37 feet
Height: 10.5 feet
Wing area: 149 square feet
Wing load: 46 psf
Takeoff ground roll (std day, SL, 6,900 pounds): 2,000 feet
Balanced field (std day, SL, 6,900 pounds): 3,200 feet
Maximum rate of climb: 9,000 fpm
Time to climb to 41,000 feet (ISA, std day, 6,900 pounds): 17 minutes
Cruise speed (ISA, std day, 5,100 pounds, 35,000 feet): 0.87 Mach, 500 KTAS, 575 mph
Stall speed in landing configuration (6,900 pounds.): 98 KCAS
Stall speed in landing configuration (5,380 pounds): 86 KCAS
Approach speed: 120 knots (at maximum gross weight)
Approach speed: 105 knots (at typical approach weight, 5380 pounds)
Landing distance (std day, SL, 6,900 pounds, full flaps)
Ground roll: 2,400 feet
Over 50 feet: 4,000 feet
Landing distance (std day, SL, 5,380 pounds, full flaps)
Ground roll: 2,000 feet
Over 50 feet: 3,400 feet
IFR range (long range cruise speed): 1,000 nm
Endurance: 3.5 hours
Fuel capacity: 280 gallons
Fuel consumption at mid-cruise weight
Economy cruise (0.75 Mach at 45,000 feet): 73 gph
High-speed cruise (0.86 Mach at 35,000 feet): 133 gph
Certified ceiling: 45,000 feet
Cargo or baggage: up to 200 pounds
Price 2005: $2.795 million (will be indexed, taxes not included)

Contact: Sara Newton
Communications Manager
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Original Release