Airframes Flashcards
Fuselage Types - Truss Type
- Frame of wood beams or metal tubes, bolted or welded
- Used on older style aircraft
- Frames covered with fabric, metal, or composite
- Frame carries load and fuselage stresses
- Two types are “Warren” and “N Girder”
Fuselage Types - Monocoque
- Stressed Skin Structure, skin carries SOME of the load
- Perfect Stressed Skin means the skin carries ALL of the load
- Formers maintain shape
- Bulkheads carry load
Fuselage Types - Semi Monocoque
- Combination of stressed skin and formers or frame system
- Has a firewall
- Cessna 172
Wing Terms - Chord
Straight Line from leading to trailing edge
Wing Terms - Camber
Upper Curvature of the wing
Wing Terms - Span
Distance from wingtip to wingtip
Wing Terms - Wing Root
Inboard section of wing closest to fuselage
Wing Terms - Load Factor
Actual weight being imposed vs weight of aircraft
Construction Terms - Spars
- Bars that run from wing root to tip (parallel to wing)
- Carry most of the load in flight
- Prevent torsion
Construction Terms - Ribs
Give shape to the wing
Construction Terms - False Ribs
Smaller ribs placed between leading edge and front spar
Construction Terms - Drag/Anti-Drag Wires
Provide additional support to the wing
Construction Terms - External Struts
External bracing from the fuselage to the wing to provide additional support (C172)
Construction Terms - Wing Tip Bow
Curved metal tube giving wingtip its shape
Construction Terms - Compression Struts
Steel Tubes placed between spars to prevent compression/distortion of the wing
Semi Cantilever Wing
Bracing supported by external struts (C172)
Full Cantilever Wing
No external bracing (Seminole)
Nose Wheel Gear Advantages
- Greater Visibility over nose while taxiing
- Nose over tendencies eliminated
- Greater maneuverability on ground
Tail Wheel Gear Advantages
- Less Drag
- Cheaper and Easier to build and maintain
- Will sustain less prop damage
- More suitable for ski operations
Forms of Shock Absorbers
- Low Pressure Tires
- Oleo (traditional shock absorber)
- Rubber discs or doughnuts
- Steel Spring
Brakes - What to watch for
- Leave parking brake off if chocked
- Hydraulic leak around main gear (red puddle)
- Cracks in pads
- Rusting over long periods due to lack of use