A320 Dual HYD question
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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.
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.
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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!
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!
Last edited by Cough; 17th May 2013 at 12:57.
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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...
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...
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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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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
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