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Uhh...keeping airplanes from lying on the ground when they're not flying?
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What is the purpose of retracting landing gear's pivot?
When the landing gear retracts, it is very important for aerodynamics that they retract into the body of the aircraft as much as possible. However, placement of the landing gear depends ultimately on factors such as the aircraft's center of gravity, its weight, its possible fuel load and much more, there may not be a good locaction in the aircraft for the wheels to rectract fully without some kind of articulation. As a result, aircraft designers often must come up with some pretty interesting solutions to enable to landing gear to be retracted fully into a space that is otherwise unused in the aircraft. Often in order for the landing gear to retract into its well, the wheel trucks may have to be rotated or pivoted. Large aircraft in particular often have multiple wheels for each of the landing gear. It is particularly difficult to design a retraction system for these as the wheel trucks may be very large and ungainly. Some large aircraft have the ability to pivot the landing gear to one direction or another for landing. This is done to increase the aircraft's capacity to land in cross-winds. In a strong cross-wind the aircraft may not be able to land gracefully pointed straight down the runway, and so the landing gear may be off-set one direction or another to allow the aircraft to land with a slight crab-angle.
Why is Vlo lower than Vle?
Vlo = Maximum landing gear operating speed (do not exceed this speed while the landing gear is operaing) Vle = Maximum landing gear extended speed (do not exceed this speed while the landing gear is extended) When the landing gear is fully retracted or fully extended it is locked into position and is more resistant to damage from high airspeeds. When the landing gear is in the process of extending or retracting (operating) there is no locking mechanism, and the only thing resisting the airflow is the extension/retraction mechanisms. Additionally, on some aircraft, the landing gear may swing or swivel in odd directions in order to tuck into their recesses, this can cause odd aerodynamic behavoir in the rest of the aircraft if done at high speeds. Once the landing gear is extended, it is rare that a pilot would then exceed Vlo. Most of the time the landing gear is lowered shortly before landing and the pilot is doing everything he can to slow the aircraft further. However in the event that an aircraft had to be flown a long distance with the landing gear extended (such as a ferry flight to a repair facility) the pilot would go ahead & fly Vle.
Why is landing gear called landing gear?
Attached to a gear are many tires. The tires are used the land the aeroplane. That is why it is called landing gear.
What are the landing gear sub system?
Not sure exaclty what you are asking. There are many minor systems that relate to the Landing Gear and the wheels and brakes. The aircraft is divided into different categories referred to as ATA categories. ATA 29 is Hydraulic Controls and ATA 28 is Fuel Controls. Landing Gear is covered by ATA 32. Then this category is sub-divided based upon the manufacturer's organization. ATA 32-10 is the Main Gears ATA 32-20 is the Nose Gears ATA 32-30 is gear retraction and extension ATA 32-40 is wheel and brakes and anti-skid ATA 32-50 is steering ATA 32-60 is Proximity Indicatio System Each of these sub-categories that relate to the braking, and steering and retraction are considered sub-systems of the landing gear.
What are the average dimensions of nose wheel landing gear of an aircraft?
Unsure if you are asking for Nose Wheel (tire) dimension or the height of the Nose Landing Gear?Nose WheelBoeing 747-200 49X17 Tire 30/32 ply rating Boeing 767 H32 X 14-15 20/22 ply ratingDouglas DC-9-50 26.6 X 6.6CH 10 ply ratingDouglas DC10-30 40 X 15.5-16 26/28 ply ratingReference: "Aircraft Landing Gear Design: Principles and Practices" by N. S. Currey, Pub by AIAA.Nose Landing GearDC10 Nose Landing Gear is mounted in the aircraft at a slight angle forward. If the gear was taken out of the a/c and laid down with the wheels removed, the full length of the gear from center of Trunnion mount to center-line of Axle is as follows: Fully Compressed 80.17 inchesStatic Position 82.17 inches (weight on gear)Fully Extended 97.17 inchesLength of Strut Stroke 17.00 inchesReference: Boeing Drawing NCG6003
Where is landing gear actuator located in aircraft?
On the Landing gear
How far from an airport should aircraft wheels be down?
The wheels along with the system is called Landing Gear. The Landing Gear can be retracted soon after take-off. Stationary landing gears slow the aircraft down.
Explain aircraft landing gear systems?
It is the system of wheels that opens before an airplane lands and closes after take off. The system also supports the aircraft while on the ground, taxiing or landing.
How many landing gear must deploy to land?
All of the landing gear on the particular aircraft.
What is a belly landing?
A belly landing is a landing of an aircraft without the landing gear being deployed.
What is belly landing?
A belly landing is a landing of an aircraft without the landing gear being deployed.
When must landing gear be deployed?
Prior to the LANDING of the aircraft to which it is attached.
Why do most small aircraft not have retractable landing gear?
because light aircraft use the basic hydraulic system for its operation so its not necassary to be there
What has the author Irving Ross written?
Irving Ross has written: 'Flightworthy active control landing gear system for a supersonic aircraft' -- subject(s): Supersonic planes, Landing gear, Landing aids (Aeronautics), Airplanes 'An electronic control for an electrohydraulic active control landing gear for the F-4 aircraft' -- subject(s): Landing aids (Aeronautics), Airplanes, Electronic equipment
What is the vetical ground reaction on the main landing gear assemblies of a Boeing 747 aircraft when landing?
What is the vetical ground reaction on the main landing gear assemblies of a Boeing 747 aircraft when landing?http://wiki.answers.com/Q/What_is_the_vetical_ground_reaction_on_the_main_landing_gear_assemblies_of_a_Boeing_747_aircraft_when_landing&src=ansTT
What is the purpose of retracting landing gear's pivot?
When the landing gear retracts, it is very important for aerodynamics that they retract into the body of the aircraft as much as possible. However, placement of the landing gear depends ultimately on factors such as the aircraft's center of gravity, its weight, its possible fuel load and much more, there may not be a good locaction in the aircraft for the wheels to rectract fully without some kind of articulation. As a result, aircraft designers often must come up with some pretty interesting solutions to enable to landing gear to be retracted fully into a space that is otherwise unused in the aircraft. Often in order for the landing gear to retract into its well, the wheel trucks may have to be rotated or pivoted. Large aircraft in particular often have multiple wheels for each of the landing gear. It is particularly difficult to design a retraction system for these as the wheel trucks may be very large and ungainly. Some large aircraft have the ability to pivot the landing gear to one direction or another for landing. This is done to increase the aircraft's capacity to land in cross-winds. In a strong cross-wind the aircraft may not be able to land gracefully pointed straight down the runway, and so the landing gear may be off-set one direction or another to allow the aircraft to land with a slight crab-angle.
What are the applications of journal bearing?
Machinability for airframes, helicopter,landing gear applications, turbine engine applications....
