A320 Dual HYD question
quick ? to all tech boffins
Example: A320 60T Green and Blue Dual Hydraulic Failure. I want to workout my Landing Distance so into the QRH on a RWY with GOOD breaking action. (FPE-IFL-29) Left Column says: G+B REF DIST calculated with 140kt min I appreciate this speed is for the Min Rat speed.However at 60 T Vref is 130 and Delta Vref is 25 giving me 155 Kt Vapp. SPD increment says N/A. (disregard ALT,WIND, TEMP,SLOPE,REV.) Ref distance is calculated for 140 Kts and 66T..Ok so youmake the adjustment for the 60T but your carrying 155-140= 15 Kts extra speed. How di I get a REF DIST for 155 Kts? Anyone? Airbus totally unintuitive….or I am missing something (probably)... Thanks to anyone. |
The ref distance is for 66T, so your 60T landing would mean less speed.... No increase in speed... No correction...
Each +5kt is for extra increments over and above the +25 kt, so as long as you factor the weight, as I understand it thats it! |
Cheers cough
Still puzzled... Ok...let's say the weight is now 66 ton..we now have vref136 and delta ref +25 Giving a vapp of 161.. I am still waiting for that airbus moment of clarity to hit me. Spd increment for this failure is NA... |
The landing distance as published assumes 161kt. The +5kt only applies if you come down final at 166kt. However, above 20kt above Vref you shouldn't be adding any extra so this column shows NA. There is a reference to this inVapp determination with failure, in the approach correction box.
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Cheers for that...
I think that's ironed out that crease. Appreciate the replies. |
Airbus Logic
If Airbus were to write bomb disarming manuals, it would go something like this -
First Line - CUT THE RED WIRE Then a few acres of words, followed by - Last Line - Be sure to cut the blue wire first. Best Regards, Old Smokey |
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