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Old 30th Nov 2010, 04:17
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AnthonyGA
 
Join Date: Sep 2007
Location: Paris, France
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Why does the Airbus PTU bark?

I know that the PTU on some Airbus models can be quite noisy when it operates, but I'm curious as to the specific design difference that causes the noise on these models but does not cause a similar noise on other aircraft. Is it the PTU design itself that makes the noise? Do other aircraft use some other way of cross-pressurizing hydraulic systems? Or do other aircraft not need to provide for cross-pressurization due to other design features? And if the Airbus has electric hydraulic pumps, why can't these be used to maintain pressure in both hydraulic circuits when necessary?

Just wondering why the Airbus seems to be different from most other aircraft in this respect.
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