The Learjet 25 also requires long runways at high altitude or ambient temperature. Taxi operations are accomplished using the electronic nose wheel steering. The landing gear, brake, flap and spoiler systems are hydraulically operated. The force applied in the nose down direction is 80 pounds at the control wheel. [2], Two General Electric CJ610-6 single-rotor axial-flow turbojet engines are pylon-mounted on each side of the aft fuselage. The electrically operated RPM tachometer consists of a signal generator on the engine and an indicator located in the centre of the instrument panel. The number of passengers, amount of cargo, and other factors contributing to the overall weight.

is a key factor in any flight plan. The valves are controlled by the FIRE switch and activation of these valves are indicated with pinhead lights located in the cockpit next to the FIRE switch. Average fuel burn was 670-680pph each engine at .65G cruise. If the red disc is ruptured, either or both the containers have been discharged overboard as a result of an overheat condition causing excessive pressure within the containers. During a series of demonstration flights lasting from June 9 to 18, 1982, the 25G broke a number of long-distance speed and fuel consumption records. Interconnecting cables synchronize the flaps throughout their range of travel and a limit switch located on the left flap sector prevents over-travel.

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The Learjet 25 also requires long runways at high altitude or ambient temperature. Taxi operations are accomplished using the electronic nose wheel steering. The landing gear, brake, flap and spoiler systems are hydraulically operated. The force applied in the nose down direction is 80 pounds at the control wheel. [2], Two General Electric CJ610-6 single-rotor axial-flow turbojet engines are pylon-mounted on each side of the aft fuselage. The electrically operated RPM tachometer consists of a signal generator on the engine and an indicator located in the centre of the instrument panel. The number of passengers, amount of cargo, and other factors contributing to the overall weight.

is a key factor in any flight plan. The valves are controlled by the FIRE switch and activation of these valves are indicated with pinhead lights located in the cockpit next to the FIRE switch. Average fuel burn was 670-680pph each engine at .65G cruise. If the red disc is ruptured, either or both the containers have been discharged overboard as a result of an overheat condition causing excessive pressure within the containers. During a series of demonstration flights lasting from June 9 to 18, 1982, the 25G broke a number of long-distance speed and fuel consumption records. Interconnecting cables synchronize the flaps throughout their range of travel and a limit switch located on the left flap sector prevents over-travel.

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The Learjet 25 also requires long runways at high altitude or ambient temperature. Taxi operations are accomplished using the electronic nose wheel steering. The landing gear, brake, flap and spoiler systems are hydraulically operated. The force applied in the nose down direction is 80 pounds at the control wheel. [2], Two General Electric CJ610-6 single-rotor axial-flow turbojet engines are pylon-mounted on each side of the aft fuselage. The electrically operated RPM tachometer consists of a signal generator on the engine and an indicator located in the centre of the instrument panel. The number of passengers, amount of cargo, and other factors contributing to the overall weight.

is a key factor in any flight plan. The valves are controlled by the FIRE switch and activation of these valves are indicated with pinhead lights located in the cockpit next to the FIRE switch. Average fuel burn was 670-680pph each engine at .65G cruise. If the red disc is ruptured, either or both the containers have been discharged overboard as a result of an overheat condition causing excessive pressure within the containers. During a series of demonstration flights lasting from June 9 to 18, 1982, the 25G broke a number of long-distance speed and fuel consumption records. Interconnecting cables synchronize the flaps throughout their range of travel and a limit switch located on the left flap sector prevents over-travel.

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lear 25 fuel burn

The indicator face is divided into green (safe), yellow (caution) and red (danger) segments. Once cruising altitude and speed are reached, the fuel burn drops off. An oxygen rupture disc will relieve oxygen pressure if the oxygen cylinder pressure reaches 2700 to 3000 psi. This is achieved by removing the starboard seating to allow for a stretcher, mounting oxygen bottles and intravenous drip equipment. The H-valve position can be adjusted by the crew to increase or reduce the amount of bleed air cooling at the heat exchanger. The engine compartments consist of an eight-stage axial-flow compressor directly coupled to a two-stage turbine, a through-flow annular combustion system, variable inlet guide vanes, controlled compressor interstage bleed, exhaust nozzle and accessory drive system. Used 261.8 Gallons for the flight. Passengers are also influenced by car performance, again measured in gallons. As the ignition cycle is completed, the igniter plugs cease sparking and combustion becomes self-sustaining. The stall warning system utilizes a stall warning vane on each side of the nose. The CJ610-6 engines fitted to the Learjet 25 have very low inertia and accelerate rapidly. The Lear 75 was developed from a nearly identical cabin of the Lear 45, but offers seating for up to 9 passengers in some configurations. Improved version. This mode is suitable for straight taxi, takeoff and gentle turns. On aircraft equipped with variable authority steering, the steering authority varies with ground speed. Dial markings are based on percent of maximum allowable engine speed. It is possible for gravel from an improperly packed gravel runway to be sucked into the engines causing "foreign object damage", thus the need for the kit. The pressure differential at final cruising altitude will be maintained at 8.7 psi difference between pressure altitude and cabin altitude. On April 10, 2014, a privately owned Learjet 25D was destroyed on the ground by Venezuelan forces. Wheel speed transducers in each main wheel axle induce an AC frequency on the DC voltage input proportionate to the wheel speed as they are driven by the wheels. The inverter outputs are frequency synchronized through a paralleling bus tie. The amount of bleed air cooling at the heat exchanger can be controlled by the hot air bypass valve (H-valve). Emergency extension can be accomplished pneumatically in case of hydraulic or electrical system failure. When the angle-of-attack transducer vanes decrease below the stall point, the nose down command is removed. The aircraft is equipped with AC (Alternating Current) and DC (Direct Current) electrical systems. When buying a car, the fuel efficiency is easily determined and stated in the vehicle specifications. A refrigeration-type cooling system is used for cooling and dehumidification while the aircraft is on the ground or operating at altitudes below 18 000 feet. The pulsating dc voltage is averaged and forwarded through the selector switch to the fuel flow indicator. Speed and altitude of flight. My cruise speed was set at .65G or 390kph SOG. An angle-of-attack indicator translates signals from the stall warning system into visual indications of the aircraft angle-of-attack and allows the crew to monitor the proximity of stall caution zone. Two motor-driven shutoff valves will stop hydraulic flow to the engine-driven pumps in case of an emergency. When averages are stated, it is important to remember that the first hour fuel usage will be significantly higher. Fuel flow is indicated via a fuel flow system. Mr Z, what was your cruise speed at 30K? Trim functions, microphone keying, autopilot override and steering system switches are located in the control wheels. FAA certified on September 4, 1970. Most Learjet 25 aircraft were fitted with a fuselage tank. Despite being used at lower altitudes and equipped with small landing gear, the Learjet can land on gravel runways if it is fitted with a special "gravel kit". The vanes provide regulated voltage input to the angle-of-attack transducers, modified by a stall warning bias box to compensate for flap position. Table showing approximate fuel burn range by class of aircraft: Table showing approximate fuel burn by specific aircraft model: As you can see, fuel efficiency figures vary greatly, and for good reason. When aircraft manufacturers quote fuel burn numbers they will nearly always show the assumptions that they make eg 6 occupants @ 200 lb (91 kg) each, Long Range Cruise speed, ISA en-route, NBAA IFR reserves with 100 nm alternate, takeoff @ Sea Level. The cabin interior can be converted to several different configurations to allow for cargo and medevacs. The fuel flow through a rotor-turbine at each engine causes the rotor to spin and a pickup coil emits pulses as the rotor blades pass through the coil field. The bleed air is cooled in the heat exchanger by ram air entering the dorsal fin inlet and passing through the heat exchanger. We discuss the costs of ownership, with a breakdown of fixed and variable costs including the fuel costs, in the following articles: Cost for a Embraer Phenom 300  Cost for a Challenger 605. The first Model 25 flew on August 12, 1966, and the first delivery was in November 1967.[1]. Nose wheel steering is electrically controlled via the rudder pedals.

The Learjet 25 also requires long runways at high altitude or ambient temperature. Taxi operations are accomplished using the electronic nose wheel steering. The landing gear, brake, flap and spoiler systems are hydraulically operated. The force applied in the nose down direction is 80 pounds at the control wheel. [2], Two General Electric CJ610-6 single-rotor axial-flow turbojet engines are pylon-mounted on each side of the aft fuselage. The electrically operated RPM tachometer consists of a signal generator on the engine and an indicator located in the centre of the instrument panel. The number of passengers, amount of cargo, and other factors contributing to the overall weight.

is a key factor in any flight plan. The valves are controlled by the FIRE switch and activation of these valves are indicated with pinhead lights located in the cockpit next to the FIRE switch. Average fuel burn was 670-680pph each engine at .65G cruise. If the red disc is ruptured, either or both the containers have been discharged overboard as a result of an overheat condition causing excessive pressure within the containers. During a series of demonstration flights lasting from June 9 to 18, 1982, the 25G broke a number of long-distance speed and fuel consumption records. Interconnecting cables synchronize the flaps throughout their range of travel and a limit switch located on the left flap sector prevents over-travel.

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