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BeechBoy · January 15th, 2007, 13:14

This is predominantly for the "big-iron" drivers or anyone else where runway lengths are frequently a factor.

The landing performance data on our dispatch releases is for a bare dry runway. Modifications are made for the following factors:
- flap settings
- whether ice has accumulated on the airplane (and the approach needs to be flown 15 knots faster)
- if a tailwind is present

No consideration is given to runway conditions at all. We often land on runways where braking action is poor (mu readings of 18-19). For the Beech this isn't a problem as far as stopping the airplane (our runways are at least 5000 feet long).

But what about you guys flying the heavies? How do you determine if the airplane can stop if the braking action is only fair or poor?

The only thing I've seen on the matter is some rules of thumb in my "Fly the Wing" book. This book states that for icy runways (braking action poor) add 120% to the landing roll.

I got the graphs for the Beech and, using this rule, determined that even with zero flaps and an iced up airplane I could land at our shortest runway but just barely.

Any input?

January 15th, 2007, 13:14	#1
BeechBoy Junior Member Join Date: Jan 2007 Location: Milwaukee, Wi Posts: 71	Icy Runways This is predominantly for the "big-iron" drivers or anyone else where runway lengths are frequently a factor. The landing performance data on our dispatch releases is for a bare dry runway. Modifications are made for the following factors: - flap settings - whether ice has accumulated on the airplane (and the approach needs to be flown 15 knots faster) - if a tailwind is present No consideration is given to runway conditions at all. We often land on runways where braking action is poor (mu readings of 18-19). For the Beech this isn't a problem as far as stopping the airplane (our runways are at least 5000 feet long). But what about you guys flying the heavies? How do you determine if the airplane can stop if the braking action is only fair or poor? The only thing I've seen on the matter is some rules of thumb in my "Fly the Wing" book. This book states that for icy runways (braking action poor) add 120% to the landing roll. I got the graphs for the Beech and, using this rule, determined that even with zero flaps and an iced up airplane I could land at our shortest runway but just barely. Any input?