Cross-section

Cross-section. A section of the fuselage, hull, float or ring of an aeroplane perpendicular to the longitudinal axis.

Cross-section comparison of Airbus A380 versus Boeing 747-400
Although wide-body aircraft have a larger frontal area (and thus greater form drag) than a narrow-body aircraft of similar capacity, ...

The cross-section shape of a wing, from leading to trailing edge.
Roll
A rotation of an aircraft around the longitudinal axis. This effect is produced by the ailerons.

Once the skirt cross-sections have been worked out you have to decide how to cut out all
the panels of material and assemble them so that the skirt will adopt the required shape.

RAM - Radar Absorbing Material - a special paint, carbon fibre, plastic, or iron ferrite coating that is applied to parts of an aircraft to reduce its radar cross-section ...

Since the wing is symmetrical (a teardrop shape in cross-section), the reduced pressure is the same both above and below.

Cracks: Fractures that would not separate the material into two parts if the surrounding supports were removed; usually originating at edges, holes, or points where concentrated loads are applied or where abrupt changes in cross-sectional area ...

-If a wire is an inch square in cross-section and breaks when a load of 150,000 lb. is hung on it, we say that the strength of the wire is 150,000 per square inch. Smaller wires equally strong have a strength of 150,000 lb.

Generally the wing of small aircraft will look like the cross-section of the figure above. The forward part of an airfoil is rounded and is called the leading edge. The aft part is narrow and tapered and is called the trailing edge.

5-inch cabin cross-section, barely large enough to accommodate two average-sized humans, but somehow, the luxurious leather interior makes it seem larger and more sumptuous.

You will notice that changing the cross-sectional shape of the wing is not on this list. Any ordinary wing flies just fine inverted. Even a wing that is flat on one side and curved on the other flies just fine inverted, as shown in figure 3.11.

Like a downburst but on a smaller scale, cross-section of 0.5 - 2 NM. The horizontal wind may average at 45 Kts with a maximum of 90 Kts. It is very dangerous as the phenomena is concentrated over a small area.
Tornadoes ...

ANHEDRAL - The downward angle of a wing in relation to a horizontal cross-section line; aka CATHEDRAL. SEE DIHEDRAL.
APPROACH CONTROL SEE RADIO NAVIGATION
APRON - The hard-surfaced or paved area around a hangar.

Further, the term usually refers to the shape of the wing or revolving blade, as seen in the cross-section.

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.

Cross-section shapes of most rotor blades are not the same throughout the span.

The fatigue aspect of scratch damage can be fixed by gently sanding the scratch out and polishing the surface. However, the cross-section reduction damage will still exist. There will be less material left to resist the load.

See also: Aircraft, Cross, Section, Wing, Flight