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A300 Leading Edge Slats  
User currently offlineRyDawg82 From United States of America, joined Sep 2001, 864 posts, RR: 8
Posted (1 year 12 months 3 days 20 hours ago) and read 4313 times:

I was curious about the A300 (all models) leading edge design and operation. While looking at the wing, the slat is essentially operated as one large slat that does not have the traditional "break" at the engine pylon. What I am curious about though is the part of the leading edge right where the wing joins the fuselage. From a distance, it appears that its a separate slat that slides down, but upon looking closer, it appears to be a Kruger flap. Does anyone have further information about how this flap operates? It simply doesn't resemble Kruger flaps commonly found on Boeing products. Does any one have any pictures or video of it in operation?

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2nd Question:

I can remember being at Stapleton Airport in the early 1990's and seeing Continental's A300s parked at the gate. These aircraft would have their slats down. I know the A300 has the option to just have the slats down (there are several topics on here about A300 No-Flap departures). Was this simply a CO company policy to leave them down to save wear and tear? Do other A300 operators do this? I cannot recall seeing a UPS or FedEx A300 with slats down on the ramp.

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Thanks,
Ryan


You can take the pup out of Alaska, but you can't take the Alaska out of the pup.
11 replies: All unread, jump to last
 
User currently offlinedlednicer From United States of America, joined May 2005, 544 posts, RR: 7
Reply 1, posted (1 year 12 months 3 days 15 hours ago) and read 4197 times:
AIRLINERS.NET CREW
DATABASE EDITOR

Regarding question 1, the original A300B1 and A300B2 had a slat that ended inboard with a gap between it and the fuselage side:

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A Krueger flap was added inboard of this on the A300B2K and A300B4 to fill the gap and gain a little CLmax:

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They were also used on the A310:

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User currently offlinewilco737 From Greenland, joined Jun 2004, 9059 posts, RR: 76
Reply 2, posted (1 year 12 months 3 days 7 hours ago) and read 4102 times:
AIRLINERS.NET CREW
HEAD MODERATOR

Quoting RyDawg82 (Thread starter):
I can remember being at Stapleton Airport in the early 1990's and seeing Continental's A300s parked at the gate. These aircraft would have their slats down. I know the A300 has the option to just have the slats down (there are several topics on here about A300 No-Flap departures). Was this simply a CO company policy to leave them down to save wear and tear? Do other A300 operators do this? I cannot recall seeing a UPS or FedEx A300 with slats down on the ramp.

LH did the same once they still had the A300's. I asked the pilots as well, why they do it. Rather simple answer: They needed it for landing and they need it for take off again, so they leave them extended. The A300 is rather big, so low chances or cars driving against it, like on smaller airplanes. And onle the slats extend and no trailing edge flaps, there is nothing in the way.

wilco737
  



It it's not Boeing, I am not going.
User currently offlinelonghauler From Canada, joined Mar 2004, 5003 posts, RR: 43
Reply 3, posted (1 year 12 months 3 days 6 hours ago) and read 4093 times:

It was policy at Wardair as well, on both the A300s and the A310s. I always thought we were the only ones that did it, but it now makes me think it was a recommendation from Airbus. We were told it was to reduce wear.

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Never gonna grow up, never gonna slow down .... Barefoot Blue Jean Night
User currently offlinesancho99504 From United States of America, joined Dec 2005, 570 posts, RR: 0
Reply 4, posted (1 year 12 months 3 days 6 hours ago) and read 4090 times:

I find it interesting that the A300/310 are the only large aircraft I have ever seen be able to takeoff with zero flaps. CA an someone explain this to me? Is it due to the design and chord of the wing that it generates an enormous amount of lift that flaps aren't needed for takeoff? Thanks


kill 'em all and let God sort 'em out-USMC
User currently offlineStarlionblue From Greenland, joined Feb 2004, 17055 posts, RR: 67
Reply 5, posted (1 year 12 months 3 days 6 hours ago) and read 4084 times:

Quoting sancho99504 (Reply 4):

I find it interesting that the A300/310 are the only large aircraft I have ever seen be able to takeoff with zero flaps. CA an someone explain this to me? Is it due to the design and chord of the wing that it generates an enormous amount of lift that flaps aren't needed for takeoff? Thanks

If memory serves, the wing performed better than expected. So an A300 can do it. However it depends on weight and runway length.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineimiakhtar From , joined Dec 1969, posts, RR:
Reply 6, posted (1 year 12 months 3 days 4 hours ago) and read 4041 times:

Quoting Starlionblue (Reply 5):
If memory serves, the wing performed better than expected.

Correct. The A310s new wing exceeded performance requirements too. An excellent article on the A310s wing design available here:

Airbus Technical Digest - The Modern Wing of the A310 - 1985


User currently offlinejetmech From Australia, joined Mar 2006, 2699 posts, RR: 53
Reply 7, posted (1 year 12 months 1 day 20 hours ago) and read 3695 times:

Quoting imiakhtar (Reply 6):

What a great publication! It's fascinating to actually learn something from reading such articles.

Regards, JetMech



JetMech split the back of his pants. He can feel the wind in his hair.
User currently offlineFabo From Slovakia, joined Aug 2005, 1219 posts, RR: 1
Reply 8, posted (1 year 12 months 1 day 19 hours ago) and read 3682 times:

I would say that many more aircraft would be able to do it, given that most flights, especially shorthaul, are way below runway limits... Some do, like Fokkers. However I think most are not even rigged for that, for ex. on the 737 there is no way to deploy slats without flaps.


The light at the end of tunnel turn out to be a lighted sing saying NO EXIT
User currently offline3rdGen From Bahrain, joined Jul 2011, 236 posts, RR: 0
Reply 9, posted (1 year 12 months 1 day 7 hours ago) and read 3607 times:

Regarding the second question, its common practice on hot days to leave flaps out one notch to allow for some air flow around the wings in order to keep the fuel from overheating. But that's Houston in Feb, so maybe not, what you said may be correct, since they're going to go down one notch for the next departure, why not just leave them down, especially if they don't get in the way of the fuel bowser.

[Edited 2012-10-05 06:15:18]

User currently offlineCCA From Hong Kong, joined Oct 2002, 836 posts, RR: 14
Reply 10, posted (1 year 12 months 22 hours ago) and read 3509 times:

Quoting 3rdGen (Reply 9):
fuel from overheating

???

I've never heard of that, there is an Airbus procedure to avoid nuisance "AIR L (R) WING LEAK" warnings when the OAT is above 30°C (86°F), which is done by leaving the flaps in CONF 1 after landing.



C152 G115 TB10 CAP10 SR-22 Be76 PA-34 NDN-1T C500 A330-300 A340-300 -600 B747-200F -200SF -400 -400F -400BCF -400ERF -8F
User currently offline3rdGen From Bahrain, joined Jul 2011, 236 posts, RR: 0
Reply 11, posted (1 year 12 months 10 hours ago) and read 3398 times:

Quoting CCA (Reply 10):

Thanks for the correction CCA, shows how much I know.


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