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Can A Plane Really Take Off From A Steep Slope?  
User currently offlineIslipWN From , joined Dec 1969, posts, RR:
Posted (9 years 7 months 1 week 4 days 15 hours ago) and read 4686 times:


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That seems like a pretty intese slope for take off to me! I know that this plane is made for short runway take off/landings, but I didn't know it could take off at that steep of a slope.


Joe

10 replies: All unread, jump to last
 
User currently offlineAmtrosie From United States of America, joined Jan 2005, 274 posts, RR: 0
Reply 1, posted (9 years 7 months 1 week 4 days 15 hours ago) and read 4668 times:

Of course it can. The converse of landing uphill applies. If ones speed slow quickly landing uphill, then all the more taking-off downhill. Air over the wing is the rquirerment, going downhill only enhances that necessity.

User currently offlineRyanair!!! From Australia, joined Mar 2002, 4757 posts, RR: 25
Reply 2, posted (9 years 7 months 1 week 4 days 15 hours ago) and read 4670 times:

You know, the runways that we see at airports are not really as level as we all think it is. It looks level because it is long. But normaly a/c that we fly on are mostly certified to take off and land on runways with a sloping factor of up to 1.5%, if I am not wrong...


Welcome to my starry one world alliance, a team in the sky!
User currently offline727EMflyer From United States of America, joined Mar 2005, 547 posts, RR: 0
Reply 3, posted (9 years 7 months 1 week 4 days 13 hours ago) and read 4534 times:

Probably the most amazing is the plane (sorry, don't know what type) operated by Kenmore Air of Seattle which took little more than a running leap of a snowy cliff. A video of it was featured in one of those short segments the old Discovery Wings Channel used to air between programs. Gravity gives the gift of airspeed most expeditiously!

User currently offlineOzLAME From Australia, joined Feb 2005, 338 posts, RR: 0
Reply 4, posted (9 years 7 months 1 week 4 days 9 hours ago) and read 4418 times:

Papua New Guinea is full of airstrips on the sides of mountains. The hazardous part is landing; apparently some of them are so steep you have to apply full power at touchdown, otherwise you will go off them backwards.


Monty Python's Flying Circus has nothing to do with aviation, except perhaps for Management personnel.
User currently offlineMir From United States of America, joined Jan 2004, 21801 posts, RR: 55
Reply 5, posted (9 years 7 months 1 week 4 days 5 hours ago) and read 4358 times:

I should think that landing uphill would put a lot more stress on the landing gear from having to absorb part of the forward momentum of the plane in addition to the weight. In addition, there must come a point where the increased G-forces would be uncomfortable (or even dangerous) for the passengers and the airframe. I've taken off from and landed on slightly sloped runways before, but the slope was no more than .6%.

Not that it can't be done, but it would seem that runways are as flat as possible for a reason.

-Mir



7 billion, one nation, imagination...it's a beautiful day
User currently offlineDoug_Or From United States of America, joined Mar 2000, 3437 posts, RR: 3
Reply 6, posted (9 years 7 months 1 week 4 days 2 hours ago) and read 4307 times:

you only have problems with the impact if you try to land on a sloped runway like its not sloped. It is a flat surface, and you can touch down just like you normaly would. landing on a upsloped runway makes precise landings easy- down sloped runways make it easy to float way past your point.


When in doubt, one B pump off
User currently offlineHAWK21M From India, joined Jan 2001, 31702 posts, RR: 56
Reply 7, posted (9 years 7 months 1 week 4 days 2 hours ago) and read 4279 times:

Quoting OzLAME (Reply 4):
Papua New Guinea is full of airstrips on the sides of mountains. The hazardous part is landing; apparently some of them are so steep you have to apply full power at touchdown, otherwise you will go off them backwards.

Any Pics.
regds
MEL



Think of the brighter side!
User currently offlineStarlionblue From Greenland, joined Feb 2004, 17118 posts, RR: 66
Reply 8, posted (9 years 7 months 1 week 4 days 1 hour ago) and read 4262 times:

Quoting Mir (Reply 5):
I should think that landing uphill would put a lot more stress on the landing gear from having to absorb part of the forward momentum of the plane in addition to the weight. In addition, there must come a point where the increased G-forces would be uncomfortable (or even dangerous) for the passengers and the airframe. I've taken off from and landed on slightly sloped runways before, but the slope was no more than .6%.

"All you have to do" is land while ascending. As long as your descent speed relative to the runway is small, you're fine. If the runway climbs steeply, the plane needs to climb too, only less steeply. Quite common in Laos during the Vietnam War.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineOly720man From United Kingdom, joined May 2004, 6840 posts, RR: 11
Reply 9, posted (9 years 7 months 1 week 4 days ago) and read 4224 times:

http://www.mafc.org/graphics/wallpapers/hill_landing_800x600.jpg

http://www.mafc.org/graphics/wallpapers/hill_landing_800x600.jpg

I'm sure I found another version of this the other day without the logo, but can't find the site it came from.



wheat and dairy can screw up your brain
User currently offlineTripleDelta From Croatia, joined Jul 2004, 1124 posts, RR: 7
Reply 10, posted (9 years 7 months 1 week 3 days 23 hours ago) and read 4197 times:
AIRLINERS.NET CREW
PHOTO SCREENER

If the slope is particularly steep, and I'm assuming that you have a minimal flare to ease the landing, what are the chances of the a/c stalling, especially taildraggers? Okay, a/c with high stall speeds and no STOL kits and such stay away from slopes, but still. For example in situations like the one in that scene from Air America with the PC-6, or:

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