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Landing Gear Systems(Airframes) > Day 1 Lecture > Flashcards

Day 1 Lecture Flashcards

1
Q

Fixed Landing Gear Purpose

A

Simple Design and Lightweight

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2
Q

Fixed Landing Gear are used for ____ powered aircraft

A

Recip

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3
Q

Fixed Landing Gear are not worried about ____ because they have ____ ____

A

Drag
Low Speed

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4
Q

Retractable Landing Gear Purpose

A

No Drag

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5
Q

Retractable Landing Gear are used on ____ ____ aircraft

A

Higher Speed

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6
Q

Most aircraft equiped with retractable Landing Gear are _____

A

Commercial

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7
Q

There are 6 configurations

A

Conventional

Tricycle

Seaplanes/amphibians

Skiplanes

Helicopter

Multiple wheeled

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8
Q

There are ____ Tandem and ____ Tandem Rows of landing gears.

A

Single
Double

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9
Q

Conventional Design Now incorporates a ______

A

tailwheel

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10
Q

Conventional Design ____ ____ carried majority of weight

A

Main Gears

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11
Q

Conventional Design Originally has “___ ___” on rear for stability for unpaved runways

A

tail skid

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12
Q

Conventional Design C.G. _____ wheel

A

behind

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13
Q

Conventional Design have ____ ____ for turning “S” Turns and Ground Loops!!

A

Differential Braking

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14
Q

Most common in use for transport aircraft

A

Tricycle Design

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15
Q

Tricycle Design C.G. is between ____ and ____ wheels

A

Main
Nose

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16
Q

What design Allows for heavier aircraft

A

Tricycle Design

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17
Q

What design Utilizes Nose Wheel Steering for turns

A

Tricycle Design

18
Q

Hull watertight (Corrosion Largest Concern)

Landing Gear retract into fuselage

A

Amphibians

19
Q

Wheels replaced with FLOATS

Aluminum or fiberglass

Rudders installed on back of floats for water taxi

A

Seaplanes

20
Q

Used for artic or snow operations

Wheels replaced with SKIS

Aluminum or fiberglass

Some may incorporate retractable skies

A

Skiplanes

21
Q

Most common design

Hydraulic dampeners may be used for shock absorption

Can incorporate ground handling wheels

A

Skid-Type

22
Q

Helios that are not exposed to landing in unimproved areas

Caster-type nose wheel (tricycle design)

A

Fixed-wheel gear

23
Q

Military and Heavy transport (possible)

A

Retractable-wheel gear

24
Q

2 wheels attached to a beam on one strut

Seldom one bogie is used

A

Bogie

25
Q

2 Bogies

Strut consist of an Air/Oil design (OLEO)

A

Truck

26
Q

Usually used with Tricycle design

Heavy weight applications

Two or more wheels per strut

A

Multiple Wheeled Landing Gear

27
Q

Also Called Shock Cord

Small airplanes (rubber band with fabric covering)

Requires special tooling to replace cords

A

Bungee Cord

28
Q

So called “Cessna Type Gear Legs”

Made of Spring Steel

A

Leaf Type

29
Q

Most common (and complex) type for Transport

Absorb heavy impact on landing and taxiing

A

Shock Strut (OLEO)

30
Q

Compressible – absorbs shock during taxiing

Dry and non- combustible

Keeps strut extended (static)

Amount of Chrome showing (air in strut)

A

air

31
Q

Incompressible – Fluid Contained in bottom chamber

Piston rises due to landing forces fluid through metered orifices to upper chamber (dynamic)

A

Oil

32
Q

Designed to control the flow of fluid from one chamber to another.

A

Metering Pin or Plunger

33
Q

Cheveron Seal– Prevents oil from escaping(one way)

Wiper/Scraper – keeps debris out of strut

A

Seals

34
Q

Simple and Complex design (Aircraft use Complex)

Uses Air (N2) and Oil (usually MIL-H-5606)

A

Shock Strut Construction

35
Q

Check for leakage, proper air pressure, and cleanliness IAW AMM

Lint-free cloth moistened with proper hydraulic fluid to wipe down exposed chrome

A

Shock Strut Maintenance

36
Q

Medium Pressure (A)
Valve Core (similar to auto)

High Pressure (B)
No Valve Core Schrader Valve

A

AIR VALVES

37
Q

Fluid level extremely low or entrapped air

Follow Aircraft AMM/Service manual for proper procedure

Typical Procedure

Construct a bleed hose to make an airtight connection to filler opening (tool part number)

Jack aircraft until struts extended

Release air pressure and remove air valve assembly

Fill strut to proper level with proper hydraulic fluid

Attach bleed hose and insert free end into a container of clean hydraulic fluid

Place exerciser jack under strut, compress and extend strut (allow to extend with own weight)

Remove jack and bleed hose, install air valve and inflate strut

A

Bleeding/ Servicing Shock Struts

38
Q

Shock Strut Troubleshooting no chrome exposed while plane is still

A

Low Nitrogen

39
Q

Shock Strut Troubleshooting Strut “bottoms out” during landing

A
40
Q

Shock Strut Troubleshooting Strut “bottoms out” during taxiing

A

Low Nitrogen

Landing Gear Systems(Airframes) (6 decks)

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