A320...Asymmetric Braking (QRH 2.11)
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Join Date: Mar 2006
Location: kuwait
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A320...Asymmetric Braking (QRH 2.11)
Hello...
few things i would like to know here ...
it says...in case of NORM BRK FAULT, multiply the landing distance by :
2.35 on dry runway
1.85 on wet runway
1.90 on contaminated runway
then it says...in case of G SYS LO PR, multiply the landing disatnce by :
2.50 on dry runway
2.25 on wet runway
2.75 on contaminated runway.
the first question is: in the first case...why the factor of the wet runway is higher than the dry runway ? and why the dry runway factor is the highest off all in the first case ?
the second question: in the second case : why the contminated factor is the highest off all ...unlike the first case ?
Thanks
few things i would like to know here ...
it says...in case of NORM BRK FAULT, multiply the landing distance by :
2.35 on dry runway
1.85 on wet runway
1.90 on contaminated runway
then it says...in case of G SYS LO PR, multiply the landing disatnce by :
2.50 on dry runway
2.25 on wet runway
2.75 on contaminated runway.
the first question is: in the first case...why the factor of the wet runway is higher than the dry runway ? and why the dry runway factor is the highest off all in the first case ?
the second question: in the second case : why the contminated factor is the highest off all ...unlike the first case ?
Thanks
Join Date: Aug 2000
Location: Farnham, UK
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My FCOM has the following note:
Dry runway assumes reverse idle only. With this mind the factors you quote then seem to make sense!
T'bug
The landing distance coefficients for wet or contaminated runways assume the use of maximum reverse thrust on all of the operative reversers.
T'bug
Join Date: Sep 2005
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I think the explanation could be that if you look at the distances quoted for "actual landing distance config full without autobrake" you can see that the contaminated distances are alredy factored somewhat to reflect the braking action expected therefore the landing distance multiplication will be slightly less than for a dry runway. I hope that made sense.
Best regards
Office Pest
Best regards
Office Pest
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Yep so does mine. Have a look at FCOM 3.02.80 kuwait340.
Furthermore standard temperatures were used demonstrating actual landing distances on dry runways. On contaminated runways actual temperatures were used to derive with those figures giving more conservative numbers.
Furthermore standard temperatures were used demonstrating actual landing distances on dry runways. On contaminated runways actual temperatures were used to derive with those figures giving more conservative numbers.