Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
A340-600  
User currently offlineDragogoalie From Australia, joined Oct 2001, 1220 posts, RR: 6
Posted (12 years 10 months 3 weeks 1 day 7 hours ago) and read 1859 times:


Click for large version
Click here for full size photo!

Photo © Gerardo Dominguez



Okay, who else thinks that plane looks very very akward. That is just way too long in my opinion. I hope that plane has a very durable tail-skid because I have a feeling it will come in very usefull on this plane.

--dragogoalie-#88--




Formerly known as Jap. Srsly. AUSTRALIA: 2 days!
18 replies: All unread, jump to last
 
User currently offlineChiuaua From Netherlands, joined Apr 2000, 113 posts, RR: 0
Reply 1, posted (12 years 10 months 3 weeks 1 day 6 hours ago) and read 1729 times:

I also thought it is too long. It doesn't look very nice.

The question about the tailskid is covered. There are rules for the minimal angle between aircraft body and ground, measured from the main wheels.

Greetz, Chiuaua.


User currently offlineJsuen From United States of America, joined Aug 2001, 211 posts, RR: 0
Reply 2, posted (12 years 10 months 3 weeks 22 hours ago) and read 1682 times:

Does anybody know the angle?

The plane that is known for tailstrikes is the 757/767. Those will scrape the ground at about 8 degrees. The overall length of the plane isn't the only factor-- the length from the main gear to the tail is important.


User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3702 posts, RR: 34
Reply 3, posted (12 years 10 months 3 weeks 21 hours ago) and read 1666 times:
Support Airliners.net - become a First Class Member!

Perhaps the A340-600 has over-rotation warning like the 747. I will let you know in a couple of months when I have done the course at TLS

User currently offlineStaffan From , joined Dec 1969, posts, RR:
Reply 4, posted (12 years 10 months 3 weeks 19 hours ago) and read 1646 times:

Perhaps the FBW system prevents the a/c from pitching more than a certain amount of degrees while the main gear is still on the ground??



User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3702 posts, RR: 34
Reply 5, posted (12 years 10 months 3 weeks 18 hours ago) and read 1641 times:
Support Airliners.net - become a First Class Member!

There have been tailscrapes on -300 models

User currently offlineEg777er From United Kingdom, joined Feb 2000, 1837 posts, RR: 14
Reply 6, posted (12 years 10 months 3 weeks 6 hours ago) and read 1593 times:

Staffan is right, the FBW will prevent tailsrikes by regulating the rate of rotation and the maximum angles.

Haven't got any figures though!


User currently offlineXFSUgimpLB41X From United States of America, joined Aug 2000, 4212 posts, RR: 37
Reply 7, posted (12 years 10 months 3 weeks 6 hours ago) and read 1587 times:

Probably isnt any more critical tail-strike wise than the 777-300... have there been any problems with that plane?


Chicks dig winglets.
User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3702 posts, RR: 34
Reply 8, posted (12 years 10 months 3 weeks 6 hours ago) and read 1588 times:
Support Airliners.net - become a First Class Member!

Eg777er - Er hello - see my post immediately above yours

User currently offlineCV640 From United States of America, joined Aug 2000, 952 posts, RR: 5
Reply 9, posted (12 years 10 months 3 weeks 3 hours ago) and read 1569 times:

I would think that FBW would help limit the tail strike, but it will still happen. I do know of even a A320 having one, now that you would really have to be aggressive on pitch up. Have heard of numerous MD11s having them as well.

User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3702 posts, RR: 34
Reply 10, posted (12 years 10 months 2 weeks 6 days 8 hours ago) and read 1522 times:
Support Airliners.net - become a First Class Member!

FBW will not stop tailstrikes, the a/c is in Direct Law mode until the landing gear un-compresses with pitch attitude confirmation from the IRS.

Direct Law means there is a direct relationship between side stick postion & the primary flight control surface postition.


User currently offlineLewis From Greece, joined Jul 1999, 3657 posts, RR: 5
Reply 11, posted (12 years 10 months 2 weeks 5 days 9 hours ago) and read 1481 times:

It doesn't look good because of the exits config IMO. I think there is too much spacing between the first and the second exits, while the second exit is too close to the overwing emergency exit.

User currently offlineGerardo From Spain, joined May 2000, 3481 posts, RR: 31
Reply 12, posted (12 years 10 months 2 weeks 1 day 6 hours ago) and read 1411 times:

First of all, thanks for using my pic  Smile/happy/getting dizzy

After seeing the A346 in real life, I have to say, that the aircraft looks MARVELLOUS!!

There are two things, which I will remember: the loooong fuselage, and the clearance (space between ground and engine) of the inner engines, which seems even less than on a B737. DOes anybody know that clearance of the inner and outer engines?

Regards
Gerardo



dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
User currently offlineSabenapilot From Belgium, joined Feb 2000, 2714 posts, RR: 46
Reply 13, posted (12 years 10 months 2 weeks 1 day 4 hours ago) and read 1406 times:

The A340-600 is the first plane to have a new additional take-off speed and symbol on the Primary Flight Display (speed tape) apart from the common V1, Vr and V2 markings. This new speed will be marked with a red dot which will represent the minimum rotation speed (=max angle) to avoid a tail stike, depending on weight, wind, Rwy, flap selection etc.

This new take-off speed will be called Vreddot and should always be situated between V1 and Vr.

It will as from now also be offered as an option on other airbusses to retain full cockpit commonality with the new A340-500 and -600. In particular the A321 would benefit from this Vreddot philosophy.

Vreddot is calculated via the same way as V1, Vr and V2 and should over time become as common to pilots as the 3 later ones.

Seems Airbus is once again one step ahead of its competitors (B757-300 for instance...)



User currently offlineFDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 34
Reply 14, posted (12 years 10 months 2 weeks 1 day 1 hour ago) and read 1372 times:

What is the philosophy Vreddot?

Is it common practice to ignore VR marking on the PFD speedtape and if so why?

Should the PF need to rotate early due to a sudden unexpected situation, will he wait for Vreddot?

I'm of the opinion this is an *innovation* borne of flight test possibly due to a preponderance of this aircraft to tailstrike. This sounds like a fix for an unforeseen (or foreseen) problem which makes it no better or worse than other Airbus or Boeings needing *fixes* in the past. In other words, "necessity is the mother of invention".

As for the "one step ahead of its competitors" comment, sounds like you're making "lemons into lemonade".



You're only as good as your last departure.
User currently offlineSabenapilot From Belgium, joined Feb 2000, 2714 posts, RR: 46
Reply 15, posted (12 years 10 months 2 weeks 9 hours ago) and read 1339 times:

Vreddot is not only used during takeoff but also during the landing flare to avoid a tailstike.

If you don't like Vreddot, you probably also dislike the V1 concept...





User currently offlineSabenapilot From Belgium, joined Feb 2000, 2714 posts, RR: 46
Reply 16, posted (12 years 10 months 2 weeks 9 hours ago) and read 1338 times:

Vreddot concept during take-off:
Any rotation before Vreddot will ALWAYS lead to a tailstike due to the plane trying to achieve an excessive Body Angle in an effort to generate sufficient lift.
Any rotation after Vreddot will NEVER lead to a tailstike as the plane will lift off before an excessive Body Angle is reached. However, in cases where Vreddot is smaller then Vr, a lift off prior to Vr will not guarantee a minimum safety speed of V2 at an altitude of 35ft above the rwy in case of an engine failure and should therefore not be used as a normal rotation speed.

Vreddot concept during landing:
Touchdowns at speeds below Vreddot must be avoided as this will ALWAYS lead to a stailstike. Corrective pilot action is required and a go around should be flown.
Touchdowns at speeds above Vreddot are NEVER going to result in a tailstike.

In short:
Vreddot offers an exact indication to the pilots to help them in operating their plane in normal, abnormal and emergency situations right up to the limits, without the risk of accidentally exceeding them during critical flight phases like take off and landing.
Airbus is proud to introduce this new concept to the flightdeck of its first 21st century plane in repacement of the unaccurate maximum BA method as used by other manufacturers.


User currently offlineRacko From Germany, joined Nov 2001, 4857 posts, RR: 20
Reply 17, posted (12 years 10 months 2 weeks 2 hours ago) and read 1301 times:

sounds very good and useful to me, it makes the pilot's life easier  Smile (and of course the passengers life saver)

User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3702 posts, RR: 34
Reply 18, posted (12 years 10 months 1 week 6 days 22 hours ago) and read 1288 times:
Support Airliners.net - become a First Class Member!

Sabenapilot,

Any rotation before Vreddot will ALWAYS lead to a tailstike due to the plane trying to achieve an excessive Body Angle in an effort to generate sufficient lift. should that read "pilot" trying to achieve an excessive Body Angle in an effort to generate sufficient lift?


Top Of Page
Forum Index

Reply To This Topic A340-600
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
A340-600 RTO Test -- What Happened? posted Thu Sep 28 2006 10:24:31 by Brenintw
Question For Actual A340 600 Pilots posted Tue Jun 20 2006 20:42:01 by Tarzanboy
A340-600 APU Exhaust posted Tue Jan 3 2006 19:10:43 by Matt72033
A340-600 Flare Vs 300/200 posted Tue Dec 13 2005 17:08:22 by CTRL_ALT_DEL
A340-600 Centre Undercarriage Unit posted Thu Aug 5 2004 12:31:05 by EGHHwizard
A340-600 Main Wheels... posted Fri Feb 20 2004 17:14:46 by JvW
A340-600 Fuel Distribution, Anyone? posted Sat Oct 11 2003 17:17:28 by S.p.a.s.
Airbus A340-600 Flight Deck posted Thu Sep 18 2003 00:51:23 by American 767
A340-600 Inboard Engines Point Down? Why? posted Thu Mar 6 2003 18:56:56 by KLAX
Price To Lease An Airbus A340-600? posted Tue Nov 5 2002 16:07:29 by JetboyTWA

Sponsor Message:
Printer friendly format