stress
Flying fitness is not just a physical condition. It has a definite meaning in the psychological sense as well.
Stress
There are two types of stress: acute and chronic. Acute stress relates to the demands placed on the body because of current issues; for example, time constraints for converting the aircraft from passenger to cargo configuration.
Stressed Skin
An outer covering used on wings and fuselages, designed to carry the tension and compression forces encountered in flight.
Stringer ...
Stress: The product of the load on a body divided by the area subjected to load, originally expressed in foot-pounds per square inch. A body is in tension when the force tends to pull it apart.
distress
A condition of being threatened by serious and/or imminent danger and of requiring immediate assistance
ditch
To land safely somewhere other than a runway ...
A distress or an urgency condition.
En Route High Altitude Charts
Provide aeronautical information for en route instrument navigation (IFR) in the high altitude stratum.
I cannot stress enough that a poor approach followed by an attempt to salvage a landing is an excellent reason for adding full power and making a go around! In addition, a good, safe pilot always thinks ahead of the airplane.
First, the stress on a machine cannot be accurately measured by a smaller model, and simply multiplying the proportions of the model's dimensions does not result in a structurally sound machine.
DETRESFA (DISTRESS PHASE) [ICAO]- The code word used to designate an emergency phase wherein there is reasonable certainty that an aircraft and its occupants are threatened by grave and imminent danger or require immediate assistance.
DEVIATIONS- ...
Emotional Distress: Mental anguish.
Equipment Status: Operational status of a piece of equipment consisting of a status indicator and status words.
D&D Cell: Distress and Diversion Cell (at ATCC listening out on 121.5Mhz and 243Mhz).
Dewpoint: The OAT at which the airmass reaches saturation point.
DME: Distance Measuring Equipment.
DETRESFA - distress phase of search and rescue operation.
DF - direction indicator. A gyro instrument which indicates the magnetic heading of an aircraft.
Though the Mayday distress signal can be transmitted over any frequency aircraft have special frequencies that are specifically for distress calls. The frequency 121.
Column 3, the yield stress (fy), is the stress (load per area) at which there will be a permanent deformation after unloading (the material has yielded, given way ... ).
Materials
d ...
Flak happy: Fear of flying, or stress accompanying flying, into flak
Flaking: Loss of a flight's member aircraft to "Aborts".
Flamed: Shot down an aircraft.
In other words, for V parts and castings which require light metal construction, but which are under no particular stress. Tin and copper are used for ferrules of wire joints and for tankage. Copper or brass wire are used for safety wires.
You might think the stresses would be greatest in the middle of the strip where the bend is greatest. In fact, the stresses are highest at the ends of the strip. Here, the strip must handle three kinds of stresses when it bends.
Effect of Turbulence on Load Factor - Turbulence in the form of vertical air currents can, under certain conditions, cause severe load stress on an airplane wing.
You are allowed to choose an airspeed higher than VA if you want, since the maneuver doesn't place much stress on the wings.
Surface friction drag: This arises from the tangential stresses due to the viscosity or "stickiness" of the air.
Because of the thermal stresses incurred in flight above Mach 2, the MiG-25 could not be constructed with traditional aluminum alloys.
Mayday: The ultimate international radio distress call, indicating imminent danger to the life of the occupants onboard and requiring immediate assistance. Its slightly less prioritary equivalent is Pan Pan.
Due to stress on the wheels and undercarriage when landing, the maximum safe landing weight may be considerably less than the maximum safe brake-release weight.
A scratch causes a stress riser, which can promote fatigue cracks. That's why during a preflight, you're cautioned to always run a hand down a prop's leading edge to look for nicks and scratches.
Remember that VA is the speed above any full or abrupt control movement (by pilot or turbulence) can cause excessive stress on the aircraft structure and depends on the weight of the aircraft. So remain below VA.
Once the flapping hinge was installed, rotor blades were breaking due to high stress. The stress was identified as being caused by coriolis force and the installation of another hinge, the lead-lag hinge solved that problem.
More importantly, the airframe was designed so that the skin of the aircraft bore most of the stress on the plane during flight. There was no interior skeleton of metal spars, thus giving passengers more room than they had in the 247.
MONOCOQUE - Type of fuselage design with little or no internal bracing other than bulkheads, where the outer skin bears the main stresses; usually round or oval in cross-section.
G or g is also used as a stress measurement for bodies undergoing acceleration., or the "loads" imposed on an aircraft or pilot. Loads may be centrifugal and aerodynamic due to maneuvering, usually expressed as g, i.e.
A number of highly stressed members are of chromemolybdenum steel (4130). Other members are of 1025 Steel.
The fuselage is made corrosion resistant by the application of a coat of zincchromate, followed by a sealer coat of nitrate dope.
MONOCOQUE - Structure in which the outer skin carries the primary stresses, and is free of internal bracing.
MONOPLANE - A fixed-wing aircraft with a single set of wings, i.e. one wing on each side.
Coning This effect is the bending of the rotor or propeller blades when stressed.
Control Surface Any one of the various moveable portions of the wings, tail surfaces, or canard.
It then requires more energy to "rip" it out, and the aluminum stringer frame and stressed-skin construction then need much more energy to start to bend, buckle and twist.
the centrifugal force reduces compressive stress on the upper surface of the blade.
Japan Airlines Corporation recently stated it will halt flights on 45 routes from Sept. 30 as the stressed carrier's new government-backed management team steps up...
The affordable, cheaper plastic parts are more prone to snapping under stress than their metallic counterparts.
If the blade is rigidly attached to the mast but isn't strong enough, it could develop stresses large enough to break the blade. This is exactly what happened to Juan de l'Cierva's early rotor systems. His solution was a lead lag hinge.
"... under the opera's quaint superficies of popular humor, the profound melancholy, the lament, the cry of distress of poetry in chains...." ...
Marker Beacon - Electronic navigation facility transmitting a 75 MHz vertical fan shaped radiated pattern
Mayday - International radiotelephony distress signal
MEDEVAC - Medical Evacuation Flight
MEL - Minimum Equipment List
MHz - Megahertz ...
Paul Sterling, owner of Sterling Aviation in Kent, Washington, is working with the FAA to modify the wing spar and lower the stress levels of critical components in the wing, hopefully adding 5,000 hours to the wing's life.
 See also: Aircraft, Flight, Aviation, Landing, Power
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