RockyRacoon From United States of America, joined Oct 2003, 945 posts, RR: 0 Reply 2, posted (9 years 6 months 1 week 1 day 4 hours ago) and read 24788 times:
Heavy planes require larger spacing in airspace traffic patterns. THey're wake turbulance can really toss the smaller airliners around. Exception to the rule is the 752, sometimes it gets treated like a "heavy" due to it's strong wake turbulance, even though it is >250,00 lbs (some weigh 250+ ie: TZ).
Wilco737 From Greenland, joined Jun 2004, 8771 posts, RR: 77 Reply 7, posted (9 years 6 months 6 days 7 hours ago) and read 24518 times:
AIRLINERS.NET CREW HEAD MODERATOR
Hi you guys,
all of your posts were correct, but the "heavy" is just the wake turbulence category, which results of the weight!
There is light, medium and heavy. It is important for separation between the aircrafts. A 737 needs to be separated of a minimum of 2 minutes behind a heavy. Otherwise it can encounter these severe wake turbulence, which can bring you in unusual attitudes!! Like we saw on the AA 300 in NY! The encountered wake turbulence of e preceding 747 and we know what happened.
The B752 is also heavy, although its weight is not above the limit for the wake turbulence category, but the 752 has short wings and these short wings need to produce a lot of lift! And with this lift the wake turbulence are even worse! So a 752 is heavy!
In ATC Communication they use the word HEAVY to make sure, that there is sufficient separation between the aircrafts...