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T/O Run: Grooved vs. not, concrete vs. asphalt

Posted: Mon Feb 11, 2019 8:08 am
by rjsampson
I can't imagine there are significant takeoff distances on a dry runway of the aforementioned runway types that would factor into calculations...

Specifically, I'd be interested if there are any appreciable distance on grooved vs. non-grooved runways (I'm guessing grooved runways add a little bit of friction).

With asphalt being softer than concrete (especially on hot days), are there any appreciable differences there?

Re: T/O Run: Grooved vs. not, concrete vs. asphalt

Posted: Mon Feb 11, 2019 9:21 am
by mmo
Makes no difference at all with dry runway. Wet is a different story.

Re: T/O Run: Grooved vs. not, concrete vs. asphalt

Posted: Mon Feb 11, 2019 9:34 am
by WIederling
Asphalt in comparison to concrete is more elastic ( and flows under enough force where concrete breaks up ).
And isn't grooving done for improving on drainage?

Re: T/O Run: Grooved vs. not, concrete vs. asphalt

Posted: Mon Feb 11, 2019 12:10 pm
by 747Whale
Grooving is for drainage, and a wet runway can use dry numbers (depending on aircraft) if grooved. Standing water is another matter. The difference shows up in a rejected takeoff.