Figure 3. Tandem landing gear along the longitudinal axis of the aircraft permits the use of flexible wings on sailplanes (left) and select military aircraft like the. Regardless of the type of landing gear used, shock absorbing equipment, brakes, retraction mechanisms, controls, warning devices, cowling, fairings, and. How The 4 Types Of Landing Gear Struts Work. Spring Steel Struts. One of the most common landing strut systems on general aviation aircraft is the spring steel strut. Bungee Cords. Bungee cords are often found on tailwheel and backcountry airplanes. Shock Struts. The last type of strut is the only one that is a true.
|Published:||5 May 2014|
|PDF File Size:||29.1 Mb|
|ePub File Size:||23.73 Mb|
A nose wheel steering tiller located on the flight deck The main gear on a tricycle-type landing gear arrangement is attached to reinforced wing structure or fuselage structure. The number and location of wheels on the main gear vary.
Many main gear have two or more wheels. Dual main gear of a tricycle-type landing gear Multiple wheels spread the weight of the aircraft over a larger area.
They also provide a safety margin should one tire fail. Heavy aircraft may use four or more wheel assemblies on each main gear.
When more than two wheels are attached to a landing gear strut, the attaching mechanism is known as a bogie.
Figure 7 illustrates the triple bogie main gear of a Boeing Triple bogie main landing gear assembly on a Boeing The tricycle-type landing gear arrangement consists of many parts and assemblies.
A main landing gear of a transport category aircraft is illustrated in Figure 8 with many of the parts identified as an introduction to landing gear nomenclature. Nomenclature of a main landing gear bogie truck Fixed and Retractable Landing Gear Further classification of aircraft landing gear can be made into two categories: Many small, single-engine light aircraft have fixed landing gear, as do a few light twins.
This means the gear is attached to the airframe types of landing gear remains exposed to the slipstream as the aircraft is flown.
As the speed of types of landing gear aircraft increases, so does parasite drag.
Landing Gear Types – Landing Gear Arrangement
Mechanisms to retract and stow the landing gear to eliminate parasite drag add weight to the aircraft. On slow aircraft, the penalty of this added weight is not overcome by the reduction of drag, so fixed gear is used.
As the speed of the aircraft increases, the drag caused by the landing gear becomes greater and a means to retract the gear to eliminate parasite drag is required, despite the weight of the mechanism. A great deal of the parasite drag caused by light aircraft landing gear can be reduced by building gear as aerodynamically as possible and by adding fairings or wheel pants to streamline the types of landing gear past the protruding assemblies.
A small, smooth profile to the oncoming wind greatly reduces landing gear parasite drag. Types of landing gear thin types of landing gear section of the spring steel struts combine with the fairings over the wheel and brake assemblies to raise performance of the fixed landing gear by keeping parasite drag to a minimum.
Figure 9 Wheel fairings, or pants, and low profile struts reduce parasite drag on fixed gear aircraft Retractable landing gear stow in fuselage or wing compartments while in flight.
Once in these wheel wells, gear are out of the slipstream and do not cause parasite drag. Most retractable gear have a close fitting panel attached to them that fairs with the aircraft skin when the gear is fully retracted. Figure 10 The retractable gear of a Boeing fair into types of landing gear in the fuselage.
During landing, the types of landing gear gear must not touch the runway first, otherwise the rear gear will slam down and cause the aircraft to bounce off the runway.
In this arrangement the main landing gear's shock absorption was taken up by a vertically sliding bungee cord-sprung upper member. The vertical post along which the upper member slid to take landing shocks also had its lower end as the rotation point for the forward end of the main wheel's suspension fork, allowing the main gear to pivot on moderate crosswind landings.
This feature was intended to enhance safety aboard aircraft carriers by redirecting the hot exhaust blast upwards, and to reduce hangar space requirements by enabling the aircraft to park with its nose underneath the tail of a similarly equipped jet.
Types of landing gear gear was used on the North American FJ-1 Fury  and on early versions of the McDonnell F2H Bansheebut was found to be of little use operationally, and was omitted from later Navy fighters. A similar arched types of landing gear is often formed from spring steel.
Landing gear - Wikipedia
The Cessna Airmaster was among the first aircraft to use spring steel landing gear. The main advantage of such gear is that no other shock-absorbing device types of landing gear needed; the deflecting leaf provides the shock absorption.
Monowheel gear is also used on some powered aircraft, where drag reduction is a priority, such as the Europa XS. Much like the Me rocket fighter, some gliders from prior to the Second World War used a take-off dolly that was jettisoned on take-off and then landed on a fixed skid.
- Landing Gear Types – Landing Gear Arrangement
- Aeronautical Guide: Landing Gear Types
- Navigation menu
Ground carriage[ edit ] The idea behind a ground carriage is to leave the landing gear on the runway and not take it into the air, in order to reduce weight and drag.