Centerline Length

bc2209

bc2209

Well-Known Member
I must be looking in all of the wrong places because I cannot for the life of me find how long each individual centerline runway stripe is.

So far what I've found through non reliable sources range from 75ft-120ft.
 
Found the source-

https://www.faasafety.gov/files/gslac/courses/content/25/181/150_5340_1K_change1.pdf

2.4 d (1)
"(1) The stripes are 120 feet (36.5 m) in length and the gaps are 80 feet (24.3 m) in length."

And the width-

  • 36 inches (90 cm) for precision runways.

  •  18 inches (45 cm) for non-precision runways.

  •  12 inches (30 cm) for visual runways.
Stripe length might be shorter-

  1. (3) To accommodate varying runway lengths, all adjustments to the uniform pattern of runway centerline stripes and gaps are made near the runway midpoint (defined as the distance between the two thresholds or displaced thresholds). Under such cases, reduce the lengths of both the stripes and gaps starting from midpoint and proceed toward the runway thresholds. Reduced stripes must be at least 80 feet (24 m) in length, and the reduced gaps must be at least 40 feet (12.3 m) in length. The affected stripes and gaps within the section should show a uniform pattern.
 
Stupid question (and my apparent lack of critical thinking skills) but when would having this info stored in my ape head ever need to be recalled?
 
ozziecat35 said:
Stupid question (and my apparent lack of critical thinking skills) but when would having this info stored in my ape head ever need to be recalled?
Click to expand...

I was asked this during a game of "stump the chump" during my initial cfi oral over fifteen years or so ago. I was the chump and I was stumped, but I've remebered it ever since then. Fortunately I was deemed worthy despite that glaring hole in my knowledge.
 
ozziecat35 said:
Stupid question (and my apparent lack of critical thinking skills) but when would having this info stored in my ape head ever need to be recalled?
Click to expand...

Trying not to bust commercial PTS on my upcoming check ride regarding landings.

Basically judging how much float I can have past my point.
 
gne in prog said:
I was asked this during a game of "stump the chump" during my initial cfi oral over fifteen years or so ago. I was the chump and I was stumped, but I've remebered it ever since then. Fortunately I was deemed worthy despite that glaring hole in my knowledge.
Click to expand...

That was the only thing I could think of..
 
dasleben said:
It can be used as a gauge of visibility during takeoff. But I've relied on that exactly zero times outside the sim world.
Click to expand...
...since you are extremely likely to require an RVR report anyway in those circumstances where you WOULD care about such things.
 
gne in prog said:
I was asked this during a game of "stump the chump" during my initial cfi oral over fifteen years or so ago. I was the chump and I was stumped, but I've remebered it ever since then. Fortunately I was deemed worthy despite that glaring hole in my knowledge.
Click to expand...
I had the same question but knew the answer because another friend had the same on his initial (different inspector)

The look on his face when I answered it as if it was an elementary question was amazing.

Never used the knowledge beyond that though
 
gne in prog said:
Found the source-

https://www.faasafety.gov/files/gslac/courses/content/25/181/150_5340_1K_change1.pdf

2.4 d (1)
"(1) The stripes are 120 feet (36.5 m) in length and the gaps are 80 feet (24.3 m) in length."

And the width-

  • 36 inches (90 cm) for precision runways.

  •  18 inches (45 cm) for non-precision runways.

  •  12 inches (30 cm) for visual runways.
Stripe length might be shorter-

  1. (3) To accommodate varying runway lengths, all adjustments to the uniform pattern of runway centerline stripes and gaps are made near the runway midpoint (defined as the distance between the two thresholds or displaced thresholds). Under such cases, reduce the lengths of both the stripes and gaps starting from midpoint and proceed toward the runway thresholds. Reduced stripes must be at least 80 feet (24 m) in length, and the reduced gaps must be at least 40 feet (12.3 m) in length. The affected stripes and gaps within the section should show a uniform pattern.
Click to expand...
Great reference (I guess)! Like Cliff Clavin, this little bit of nothing will stick in a corner of my head until I blurt it out at some weird time. It leaves me wondering if they are scaled precisely on my synthetic vision. I will not attempt to count stripes on a TO roll and compare.
 
Duu ...I thought it was common knowledge amongst instructors, and students practicing for checkrides.
120'+80'= 200' so max float beyond landing point is one stripe and a space for PP and 20' short of a full stripe for CAX .
How do you guys teach this distance limit on landings? For the PTS , and for student solo practice?
 
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