Sheet metals and compsosites
This is the minimum distance between the center of a rivet hole and the edge of the sheet metal sheet.
What is 2 times the diameter of the rivet (2D)?
This structural fuselage design relies primarily on the strength of the skin to carry the primary flight loads.
What is a monocoque design?
This flight control surface controls an aircraft's movement around its lateral axis (pitch).
What is an elevator?
This is the specific color of Mil-H-5606 petroleum-based hydraulic fluid.
What is red?
This component in a landing gear shock strut absorbs the initial landing impact forces.
What is the hydraulic fluid/metering pin (or oil charge)?
This type of core material is commonly used in sandwich-structure composite panels due to its high strength-to-weight ratio.
What is honeycomb?
This type of corrosion is most likely to occur in areas where two or more dissimilar metals make contact.
What is galvanic corrosion?
This terms describes the longitudinal angle of the wing relative to the horizontal chord line of the aircraft fuselage.
What is the angle of incidence?
This device protects a hydraulic system from over-pressurization by dumping fluid back to the reservoir.
What is a pressure relief valve?
This valve or device prevents hydraulic nose wheel shimmying or rapid oscillation during taxiing.
What is a shimmy damper?
This property describes a material's ability to be rolled, thin-drawn, or permanently deformed without rupturing.
What is malleability?
This primary structural member runs longitudinally down the fuselage to provide strength and shape.
What is a longeron?
These secondary flight controls are attached to the trailing edge of the wing to increase lift at low speeds.
What are flaps?
This system component stores fluid under pressure to act as a cushion and provide a backup supply of energy.
What is an accumulator?
This term describes the alignment of the landing gear wheels when they point slightly inward toward each other.
What is toe-in?
This type of inspection uses high-frequency sound waves to detect internal delaminations in a composite panel.
What is ultrasonic inspection?
This type of stress is a combination of tension and compression acting simultaneously on a wing spar in flight.
What is bending stress?
This specific tool is used to check and measure the tension of flight control cables.
What is a tensiometer?
This specific type of synthetic hydraulic fluid is fire-resistant and typically light purple in color.
What is Skydrol?
This device prevents the landing gear from retracting accidentally while the aircraft is resting on the ground.
What is a squat switch (or landing gear safety switch)?
This is the primary structural defect found when an aluminum sheet shows black oxidation soot coming from around a rivet head.
What is a working rivet (or smoking rivet)?
This structural device is installed at the wingtip to reduce induced drag by preventing wingtip vortices.
What is a winglet?
This condition occurs when a control surface is overbalanced or under-insulated, causing rapid, destructive oscillations in flight.
What is control surface flutter?
This component allows hydraulic fluid to flow freely in only one direction while blocking flow in the opposite direction.
What is a check valve?
This specific type of air valve is used on landing gear shock struts to service them with high-pressure nitrogen.
What is a Schrader valve?