PPRuNe Forums - View Single Post - RTOW Min and Max Acc Heights
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Old 3rd Mar 2013, 20:59
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pilot-737
 
Join Date: Dec 2006
Location: Athens
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Hazelnuts39
The engine out accelaration procedure according to airbus is :
Push to level off at acc altitude...
Clean up the aircraft while maintaining this altitude (529 ft)
And then select green dot open climb mct thrust
With 2 engines you are in uninterrupted climb and you DON'T level off at 400ft
In addition you reach 400 feet in a shorter distance than in a OEI condition so yes you are able to to reach 529 ft while you climb and clean up simultaneously without penetrating your obstacle identification surface ! Imagine the inertia and your rate of Climb at 400 ft With 2 engines...if you suddenly lose an engine you will be at 529 ft before your failed engine fails in windmilling condition (129 ft : 1500 ft / min = 5.16 sec ) Don't forget that in OEI you have less than 50% of your 2 engines gradient...
I'm always talking about 2 eng acft and the second segment as this is the point when talking about the MINIMUM acceleration altitude
I think a 4 engine acft may have a final segment concern which may affect your max acceleration altitude but this is an other story
as I said the problem may arise If your min acc altitude is much higher than your standard acceleration altitude and if you experience an engine failure AFTER your standard thrust reduction altitude in this case
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