The Learjet 35A is a measurement aircraft for deployment in the upper troposphere and lower stratosphere, operated by Enviscope GmbH, Germany.
The Learjet 35A is a twin-engined jet aircraft that was originally conceived as a business jet. The basic version has seating for two pilots, a flight attendant and seven passengers. Its flight characteristics and construction also make it ideally suited for use in atmospheric research.
The Learjet 35A has the following characteristics:
* excellent flight performance, i.e. long range and good rate of climb
* maximum height of 45,000 feet, also attainable with externally mounted equipment
* economical operation
* adequate body size for the installation of measurement equipment in 19-inch racks
* large cargo door allowing easy access
* robust construction enabling easy modification
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More Information (under review)
Dimensions: Length: 14.83 m; Height: 3.73 m; Wingspan: 12.04 m; Flying performances: Speed: Usual speed during transit flights: 236 m/s Ascent rate: 1708 m/s Altitude: (1 ft = 0.31 m) Min altitude: Above sea: 492 ft Above ground: 492 ft Max ceiling: 45000 ft Usual ceiling during measurements: 41000 ft Ceiling limitations: Range/endurance with external probes and canisters: payload 1000 kg: 3400 km, 5 hours payload 1200 kg: 3000 km, 4.5 hours payload 1500 kg: 2600 km, 4 hours payload 1800 kg: 2200 km, 3.5 hours typical max. scientific payload is 1200 kg Payload: Empty weight: 4717 kg Max take-off weight: 8890 kg Max payload: 1800 kg Usual scientific payload during measurements: 1200 kg Endurance: Max endurance: 5 h (at min scientific payload and max fuel) (Y-coordinate of 1st point) Range: Max range: 3500 km (at min scientific payload and max fuel) Range at max scientific payload: 3000 km Usual range during measurement flight: 3400 km Other: Weather conditions limitations: VFR, IFR, Known icing conditions Take-off runway length: 1310 m Engines: 2 Garett TFE 731-2-2B, TO thrust: 3175 kg/engine; Crew and scientists on board: Crew (pilots + operators): 2 pilots; Seats available for scientists: up to 8 passengers (2 -3 in scientific conf.) Cabin: Length: 5.31 m Width: 1.46 m Height: 1.32 m Apertures: Cargo door : width: 0.84 m, heigth: 1.2 m; Cabin pressurized: Yes Aircraft modifications: Openings: 1 roof aperture with 152 mm diameter 2 Window replacement plates (181 x 273 mm), mounting provisions for different inlets special door replacement kit for a foto hatch Hard points: 1 Pylon with hardpoints (nato-lock) under each wing, 450 kg load capacity per side. Inlets: 1 isokinetc "Aerosol Inlet" 1 "NOy Inlet with Converter" (customer application) 1 "Multichannel" Inlet 2 "Universial Inlets" with backward-forward openings 1 "Aerosol straight-lined Inlet" for underwing container Additionnal systems: Additional systems : 2 Underwing container, length: 2,90 m, 0,39 m Diameter, load capacity for scientific equipment: 120 kg, mounting provisions inside 2 Towed Drones with winch system Meteorological Sensors, temperature, pressure, humidity measurement and dewpoint hygrometer Interface to air data computer Acquisition systems: Data aquisition for internal and user data, Interface to ARINC 429, several serial ports, provisions for time synchronisation, software with on-line grafics, quick look processing, online processing of physical data, data storage systems. Electrical power: Electrical power (kW) and voltages (V) available for scientists: 9 kW, primary in 28VDC Inverters up to 5 kW/220V and 1 kW/110V available