Aircraft Structures: Test 1

Cantilever Wing

Has no struts

Truss structures and wire bracing

Robbed the aircraft of speed.

Monocoque

Stressed skin structure. Skin carries load

Semi-Monocoque

Longerons, stringers, and curcumferentials carry load

Pressurized structures

Rip stop doublers. Had issues with breaking apart.

Datum

Imaginary point which measurements are taken. Measured in inches

Arm

Distance from datum "about station 530 (inches)"

Water Line

Distance above or below some arbitrary horizontal plane

Buttock Line

Distance left or right of the plane of symmetry

Reference points

A position

Chordline

Line connecting trailing edge to leading edge

Angle of Attack

Angle between the chord line and the relative wind

Angle of Incident

Difference between longitudinal axis and chord line

Truss type airfoil

Ribs, compression struts, spar, drag wires, gussets

Semi-Monocoque Aircraft

Control surfaces - monocoque, metal wings, cantilever wing

Longitudinal Controls

Fixed horizontal stabilizer, elevator, trim, and stabilator

Auxiliary Trim Devices

Pilot must be able to determine trim position

Assembly

Refers to the joining of parts or sub-assemblies by various means until the entire a/c is in condition for operation

Rigging

The alignment of parts or sections to obtain proper flight characteristics

Assembly Guidlines

Correct type and size

Rigging requirements

Can be found on type cert. data sheet

Dihedral Board

Board with level used on front spar to get dihedral angle

Washin/Washout

Wash in - increase lift and drag

Wash out - decrease lift and drag

Aircraft Cables

Corrosion resistant steel and carbon steel

Cable inspection

Tested to 60% of their rated strength

Par-Al-Ketone

Protects cable from moisture and corrosion. Run a cloth along cable to test for "burrs"

AN

Denotes aircraft part

AD

Denotes material code

AN meaning

Army/Navy (airforce/navy)

NAS

National Aerostandard

MS

Military Standard

Nut Types

Plain, Casle, Self-Locking

Self-Locking Nut Restrictions

All metal. Fiber or nylon. Heat and rotation restriction.

Screws

Machine screws or PK screws(self tapping)

Specific Information of an Aircraft

Can be found in the mx manual

Waterline

Level that water would reach if it were to fill up

Stainless Steel v. Regular Steel

Regular Steel is magnetic

Self locking Nut test

If you can put it on by hand, it's bad (No heat, no rotation)

Cable Inspection

Soaked cloth passover

Pulley Cable Alignment

No more than 3 deg

Grip Length

Should equal the thickness of the material