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Climb Segments again

 
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DaveS



Joined: 11 Nov 2009
Posts: 1

PostPosted: Wed Nov 11, 2009 10:01 pm    Post subject: Climb Segments again Reply with quote

If I understand correctly the FAA came up with these segments. Where do they get the 2.4%, 1,2%? Are these just minimums to be able to certify your plane? The standard 1/2 mile runway is 200ft/nm which equates to 3.3%. I'm a little puzzled Rolling Eyes
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K.Haroon
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Joined: 11 Dec 2005
Posts: 1295

PostPosted: Thu Nov 26, 2009 5:48 pm    Post subject: Reply with quote

Regarding your query the 2.4% and 1.2% engine out gradients are used for certification of a two engine airplane. From where have they come, I dont know, I believe a performance engineer would be able to answer this.

Regarding 3.3%, I havent understood your point. I think thats the general IFR requiremnet in SIDS which is different from certification gradients.

Procedure gradients are different than A/C performance gradients. Following might be helpful in understanding.

JAR OPS 1.510 - Landing Destinations and Alternates

For instrument approaches with a missed approach gradient greater than 2.5%, the expected landing mass must allow a missed approach with a climb gradient equal to or greater than that in the OEI missed approach configuration and speed [see JAR 25.121(d)]. Alternative methods must be approved.

With a DH of below 200 feet the expected landing mass must allow a missed approach gradient of climb, with the critical engine failed and the speed and configuration for go-around for at least 2.5%, or the published gradient, whichever is the greater [ see JAR AWO 243 ]. Alternative methods must be approved.

Also check out this link http://www.pprune.org/tech-log/445232-approach-climb-2-1-vs-macg-2-5-greater.html


Last edited by K.Haroon on Tue Aug 14, 2012 8:54 am; edited 2 times in total
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