Aircraft Fuel Systems (Aerospace Series (PEP)) by Roy Langton, Chuck Clark, Martin Hewitt, Lonnie Richards PDF

By Roy Langton, Chuck Clark, Martin Hewitt, Lonnie Richards

ISBN-10: 0470057084

ISBN-13: 9780470057087

ISBN-10: 047005946X

ISBN-13: 9780470059463

ISBN-10: 156347963X

ISBN-13: 9781563479632

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Extra info for Aircraft Fuel Systems (Aerospace Series (PEP))

Sample text

This is discussed in more detail in Chapter 9. Ribs and stringers within the integral tank structure must allow fuel and air migration within the fuel tank boundary and inertia loads resulting from fuel slosh during aircraft acceleration must be accommodated by this structure. An even more critical requirement for fuel tank structure is the accommodation of fuel inertiainduced forces during worst case hard landings. This requirement is particularly critical in helicopter fuel tank design where the accommodation of an auto-rotation landing can impose very large g loads upon impact and therefore the structural design of the fuel tanks must ensure that fuel leakage, which would bring with it an obvious fire risk, is prevented.

This requirement is particularly critical in helicopter fuel tank design where the accommodation of an auto-rotation landing can impose very large g loads upon impact and therefore the structural design of the fuel tanks must ensure that fuel leakage, which would bring with it an obvious fire risk, is prevented. The structural designer must therefore accommodate the specified maximum g forces in each of the three orthogonal axes taking into account the maximum mass of fuel within each tank or compartment.

In addition to the primary fuel gauging function a second measurement system called ‘Secondary gauging’ is required to ensure the integrity of this critical function and to permit safe aircraft dispatch in the presence of gauging system failures. The secondary gauge must use dissimilar technology to guard against common mode failures. A common type of secondary gauge is the Magnetic Level Indicator (MLI) where the position of the floating magnet can be read by the ground crew on a stick protruding from the base of the fuel tank.

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Aircraft Fuel Systems (Aerospace Series (PEP)) by Roy Langton, Chuck Clark, Martin Hewitt, Lonnie Richards


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