PPRuNe Forums - Turbine Engine Mounts.

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Turbine Engine Mounts.

I was asked a question regarding which mount transmits the axial load of the engine. Front, Rear or both?

On the aircraft i work on (777 and 747) the answer seems to vary. Most instructors i talk to don't appear to agree.

What are your thoughts.

Tim

That would be the front. The aft mount is usually articulated to cater for thermal expansion of the engine.

By axial, do you mean thrust loads? i.e. along the longitudinal axis of the engine?

On a 777, the AFT mount takes care of that, via the thrust links. Those would be those two effing great links that connect the intermediate case (on a RR) or LPC case on a GE90, to the aft mount. (I have no idea about PW engines)

That's also the reason that even though the front of the engine is heavier, and thats where the trust-producing fan is, you'll notice that the aft mount is twice as big and has twice as many bolts, and also has those two huge dowels.

I've never worked on a 747, so I can't help you there.