DEN-HNL From United States of America, joined Apr 2000, 164 posts, RR: 0 Reply 1, posted (13 years 6 months 3 weeks 5 days 21 hours ago) and read 3876 times:
The use of the "heavy" designator is a matter of an aircraft's capable take-off weight. If an aircraft is capable of take-off weights of 300,000 pounds or more, the word "heavy" is part of the identification. I believe the Concorde has a max take-off weight of over 400,000 pounds. Wow!
Robin27 From , joined Dec 1969, posts, RR: Reply 3, posted (13 years 6 months 3 weeks 5 days 17 hours ago) and read 3812 times:
I think the term 'heavy' relates not to the weight of an aircraft, but to the size. If an aircraft is designated heavy it denotes that increased seperation must be allowed for following aircraft due to the vortices generated.
Although Concorde indeed has a MTOW of around 400,000 lbs, it is very compact in realtionship to a widebody a/c, however in the case of Concorde, the delta wing and high nose up attitude on approach generate considerable vortices. For safety reasons, these must be allowed to disperse before a smaller aircraft can follow.
Can somebody confirm this and maybe get a little more technical with the answer.
Acvitale From United States of America, joined Aug 2001, 921 posts, RR: 11 Reply 4, posted (13 years 6 months 3 weeks 5 days 17 hours ago) and read 3804 times:
Heavy does infact relate to the weight not the fuselage size. The 757 is the first aircraft that does not fit into the weight catagory yet develops significant wingtip vortices. Hence, often they will specifically site aircraft following a 757 and offer expanded distances between aircraft.
It will be interesting in the next few years as improved wing designs start popping up to see if other aircraft slide into the no-mans land between heavy and standard operations.
AerLingus A330 From , joined Dec 1969, posts, RR: Reply 6, posted (13 years 6 months 3 weeks 5 days 17 hours ago) and read 3797 times:
I've enjoyed all the conversations surrounding this topic however I was wondering, despite being a "widebody", would the A330 and A340 be classified as heavies?
The only reason why I ask is that I have a scanner tracking activity at Logan International here in Boston. Several weeks ago I heard Aer Lingus' transmission as it was approaching runway 4R.
I could have sworn that the the Aer Lingus pilot's response to the Boston Air Traffic commands was "Shamrock 133" and not "Shamrock 133 heavy" which I know it used to be when they flew the 747-100's years ago.
Could anyone who is on the ball with this kind of information please tell me if I was just hearing things or if in fact an A330 is not considered a "heavy"!
AA61hvy From United States of America, joined Nov 1999, 13977 posts, RR: 58 Reply 7, posted (13 years 6 months 3 weeks 5 days 17 hours ago) and read 3791 times:
A "heavy" is a classification of an plane that weighs over 250,000 lbs. The 757 is almost a heavy but the MTOW is 250,000 and it has to be over 250. Concorde weighs i think around 325,000 lbs. Maybe less, i cant remember. I know these heavy questions!
BOS-CDG From , joined Dec 1969, posts, RR: Reply 9, posted (13 years 6 months 3 weeks 5 days 17 hours ago) and read 3785 times:
A typical ATC system would display for correlated tracks (aircrafts correlated to a flight plan) an information called WTC (Wake Turbulence Category), which is H, M, L (Heavy, Medium, Light) depending on the aircraft.
There used to be an interesting page explaining Wake Turburlence, of the Denver ARTCC web site, but I can't get it anymore, you can have a look in the meantime at this fun one :
Ake0404AR From United States of America, joined May 2000, 2534 posts, RR: 49 Reply 12, posted (13 years 6 months 3 weeks 5 days 9 hours ago) and read 3751 times:
A lot of times the simply forget to add " the heavy " , i.e I flew to FRA on SIA in Dec 99 and on the approach and landing I was sitting up front and the ATC Controller called us Singapore 025 heavy, but the response from the the first officer was .............Singapore 025 ....without the heavy...............another example LH 423 ( Which definitely is a " heavy " ) took off today and the captain only responed as LH 423 heavy on the ground, once they took off without the " heavy " but as far as I know widebodies are all called " heavy " b/c if a small aircraft gets into the flight path take off or landing , weight turbulence could be severe for this small aircraft.
HP-873 From , joined Dec 1969, posts, RR: Reply 15, posted (13 years 6 months 3 weeks 5 days 7 hours ago) and read 3746 times:
In the Pilot/Controller Glossary section of the Aeronautical Information Manual aka AIM, Aircraft Classes for the purposes of wake turbulence separation by ATC, a Small aircraft is one with less than 41000lbs. , between that and 255000lbs. it is a Large aircraft, and beyond 255000lbs. it is a Heavy, all these weights are based on maximum takeoff weight. If you have an AIM nearby you will find interesting separation distances used by ATC on 7-3-9, if not, then http://www.faa.gov/ATPubs/AIM/Chap7/aim0703.html#7-3-9
DEN-HNL From United States of America, joined Apr 2000, 164 posts, RR: 0 Reply 16, posted (13 years 6 months 3 weeks 3 days 20 hours ago) and read 3719 times:
Does anybody know, has the weight for a heavy been decreased to 255k pounds recently? (Within the last 3 years?) All the reference material I've got says 300k pounds and it was the first figure to come to my mind when I opened the thread. BUT, my most current AIM is from 1997!