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.
Jsuen From United States of America, joined Aug 2001, 211 posts, RR: 0 Reply 2, posted (12 years 5 days 2 hours ago) and read 1444 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.
CV640 From United States of America, joined Aug 2000, 951 posts, RR: 6 Reply 9, posted (12 years 4 days 6 hours ago) and read 1331 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.
Gerardo From Spain, joined May 2000, 3481 posts, RR: 33 Reply 12, posted (11 years 12 months 3 days 10 hours ago) and read 1173 times:
First of all, thanks for using my pic
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?
dominguez(dash)online(dot)ch ... Pushing the limits of my equipment
Sabenapilot From Belgium, joined Feb 2000, 2712 posts, RR: 48 Reply 13, posted (11 years 12 months 3 days 7 hours ago) and read 1168 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...)
FDXmech From United States of America, joined Mar 2000, 3251 posts, RR: 36 Reply 14, posted (11 years 12 months 3 days 4 hours ago) and read 1134 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".
Sabenapilot From Belgium, joined Feb 2000, 2712 posts, RR: 48 Reply 16, posted (11 years 12 months 2 days 13 hours ago) and read 1100 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.
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.
VC-10 From United Kingdom, joined Oct 1999, 3691 posts, RR: 35 Reply 18, posted (11 years 12 months 2 days 2 hours ago) and read 1050 times:
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?