Why are integral fuel tanks used in many large aircraft?

Why are integral fuel tanks used in many large aircraft?

Why are integral fuel tanks used in many large aircraft? To reduce weight. are still necessary due to the possibility of contamination from other sources. formed by the aircraft structure.

Why do you think fuel is stored in a jumbo jet’s wings?

Fuel acts as a counter stress for the wings shortly after take-off when the stress of the aircraft mass acts on them (during take-off it is always the largest). This prevents a large change in the wing dihedral angle. In bigger aircraft, leaving the wing tanks empty might result in wings simply snapping off.

Why are aircraft fuel tanks Pressurised?

Each tank is vented (or pressurised) to allow air into the tank to take the place of burned fuel; otherwise, the tank would be in negative pressure which would result in engine fuel starvation. A vent also allows for changes in atmospheric pressure and temperature.

What happens if the fuel selector is in both position?

This means we can no longer guarantee item #2 above: If the fuel selector were in the “Both” position and one tank ran dry the fuel pump is going to happily try to suck air through the line from the empty tank, and that could cause the engine to quit.

Why do GA manufacturers opt to use just a left / right selector valve?

Why do GA manufacturers opt to use just a Left/Right selector valve given that a majority of GA accidents are fuel related and off-airport landings with fuel in a tank is still relatively common? Is there a safety issue I’m not seeing?

Why do you need a fuel selector valve?

Since the aircraft already needs to have a fuel selector valve anyway it’s easier to just design the valve in such a way to satisfy item #1 on the list: Make sure the fuel pump can only draw from one tank at a time – i.e. “Don’t provide a “Both” position on a low-wing aircraft.”

What kind of fuel pump does a GA plane use?

Most GA planes are configured with either a gravity feed fuel system (like the Cessna 172) or an engine driven fuel pump ( Piper Cherokees) that can be supplemented with an electric fuel pump should it quit or become partially inoperative. The FAA has a nice document on it here (see pump feed systems) their opinion is,