W2 (Fuel Sys, Components) Flashcards
3 Types of Fuel Tanks
- Metal
- Integral/Structural (Wet wing)
- Rubber bladder
Smaller tanks
*Made from: sheet steel coated with lead/tin alloy (terneplate)
*Seams - folded over and soldered
Larger tanks
*Aluminum alloy
*Seams: riveted and welded, sloshed w/ sealant
Integral/Structural Tanks (Wet wing)
The structures itself forms the tank
Structural Tank (Wet wing) location
Aircraft Wing
Bladder Tank
- Material - Neoprene
- Structure - to hold shape and for support
Snaps, clips, lacing
Used to the tank to attach to the structure
Fuel filler cap location
- Aircraft Wing - Top side of a fixed wing
- Helicopter - fuselage (fuel tank is close to the CofG)
Bad O-Ring
*Fuel Contamination (letting water & debris in the fuel tank)
*Fuel leakage
Vented filler caps
Vent hole = kept clear at all times
Goose neck vent
Tube opening facing forward (+ve pressure in the tank)
Filler caps must be……
Electrically bonded to the airframe
Lightning proof filler caps
No exposed metal parts in the tank (prevents static discharge)
Non-siphoning cap adapters
*Has a spring-loaded flapper valve
*During refueling - pushed open by the fuel nozzle
*During flight - closed
*Cap lost/left off during refuel- fuel does not siphon out the tank.
Fuel lines
*Rigid or flexible
*Location & application depending
