2% Runway slope limitation

[Lead Sled]

'Sled, maybe I could use you as a reference for my new book...

"How to Land a Plane in 10 Easy Steps... OR... It Wasn't the Pilot's Fault, It Wasn't the Plane's Fault, It Was the Asphalt!"

Sure, I'll collaborate with you on your book - just as soon as I finish my latest book...
Stupid Things I Have Done In Airplanes Volume III. I'm already doing the research on volume IV.

'Sled

 

[Clutch_Cargo]

Sure, I'll collaborate with you on your book - just as soon as I finish my latest book...
Stupid Things I Have Done In Airplanes Volume III. I'm already doing the research on volume IV.

'Sled

You've got some of those volumes too? I was going to publish mine posthumously... pride 'n all ya know!

 

[Lead Sled]

If you want to know the actual slope, check the afd (green noaa book) published every 56 days, it has the slope everywhere. Your AFM limitations and performance numbers are the limitations when you figure slope and conditions.

Dale...
We probably ought to at least try and keep this thread on topic. Just out of curiosity, what the the AFD show as the gradient for Telluride (KTEX)?

'Sled

 

[MTpilot]

Out of curiousity

Why the 2% limit. I've been on a few runways with slope, works just fine, take off downhill, land uphill, some of them are short enough it would be tougher getting in if it weren't for all that slope.

 

[Lead Sled]

Why the 2% limit. I've been on a few runways with slope, works just fine, take off downhill, land uphill, some of them are short enough it would be tougher getting in if it weren't for all that slope.

As far as I know, it's a certification thing. They had to establish a limit and they chose 2%. Kind of like the 10 knot tailwind limit. I have heard of cases where operators needed greater limits and were able to get waivers.
'Sled

 

[Clutch_Cargo]

Dale...

If you've got an AFD handy I'd also be curious to hear what it lists for a gradient at TEX. What I remember is just like 'Sled said... overall it's about a quarter percent. But that dip in the middle is like 65 ft of elevation change and it has a gradient of 1.9% or something close. I haven't been in there in about 4 yrs so I don't know if things have changed but I remember that they were talking about leveling out the runway.

cc

 

[fly4free]

Lead Sled is not really a pilot...He just stayed at a Holiday Inn Express last night.

Fly

 

[C77MD80]

Thanks all, that was quick! I appreciate it

 

[bafanguy]

Taking a type soon and have 2% runway slope limit. Not exactly sure how that is figured. Anyone know? I do know it's not really an issue as our computer/performance won't allow it, but our examiner is asking...

I suppose it's nice, in terms of general knowledge, to know how to compute it, but in a 121 operation where you better not get caught doing your version of "runway/airport analysis", why would an examiner expect you to be able to demonstrate it ? Show me how to do something I better never catch you doing ? lol

The 2% number is fair game on an oral if it's in the Limitations Section as knowing it shows you have a general awareness of the factors that go into making up runway analysis.

At my former carrier, the pct slope for each runway was published on the airport analysis pages and had been figured in to the allowable weights. And with computer weight & balance, we rarely even used the pages from the 50 lb book.

If I were giving orals, I can think of a whole lot of more important stuff to ask a guy.

 

[Lead Sled]

I suppose it's nice, in terms of general knowledge, to know how to compute it, but in a 121 operation where you better not get caught doing your version of "runway/airport analysis", why would an examiner expect you to be able to demonstrate it ? Show me how to do something I better never catch you doing ?

The problem is that it's only the 121 guys that have someone doing this for them. The rest of us 91 and 135 guys have to fend for ourselves and do "our version of runway/airport analysis". He needs to know how to calculate slope and he needs to know how slope factors into the runway performance calculations. It's a fair question.

'Sled