lahaina
Posts: 238
Joined: Sun Sep 03, 2000 1:51 am

Stage III Aircrafts

Sat Oct 21, 2000 11:18 am

Can someone please educate me on what Stage I, Stage II, and Stage III aircrafts are?
 
astrojet
Posts: 553
Joined: Thu Aug 31, 2000 9:11 pm

RE: Stage III Aircrafts

Sat Oct 21, 2000 1:03 pm

This are noise regulations.
Stage I are the loudest planes like the DC 8-30 or the Trident and I believe they had to quit operations on January 1st 1986.
Stage II are planes like DC 9-30 or B 737-200 and they have to quit on January 1st 2002.
Stage III are the silent planes like the B737-300 and up or A 320.
I still remember in the seventies, when I was a kid and went close to the runway to see those stage I planes take off, that was noisy! even the ground was shaking like a small earthquake! and then the black smoke. Things we never gonna see again.

rgds



 
lahaina
Posts: 238
Joined: Sun Sep 03, 2000 1:51 am

Astrojet

Sat Oct 21, 2000 1:10 pm

Are stage I aircrafts all tubojets?
Stage II=early turbofans?
Stage III=high bypass ration turbofans?
 
astrojet
Posts: 553
Joined: Thu Aug 31, 2000 9:11 pm

RE: Stage III Aircrafts

Sat Oct 21, 2000 1:21 pm

Well , the regulation only cares about the noise in db. (I don´t know if in english you write decibels), but it may fit pretty good to that categories of engines.
 
747-451
Posts: 2327
Joined: Wed Oct 04, 2000 5:50 am

RE: Stage III Aircrafts

Sat Oct 21, 2000 1:38 pm

Stage III aircraft are also older liners like the DC-8 or 727, for instance, which have been fitted with noise supression ("hush kits")
 
trintocan
Posts: 2728
Joined: Sun Apr 23, 2000 6:02 pm

RE: Stage III Aircrafts

Sat Oct 21, 2000 1:39 pm

Lahaina you are generally correct about the noise levels of the different categories of jet engines fitted to airliners. Older planes such as Stage I or II types are only able to continue in service by being modified to reduce noise levels. This can be done by fitting hushkits to the engines or putting on new engines altogether. For instance, many 727s are hushkitted while others have had JT8D-217A/C engines (as on MD80s) fitted on the outboard pylons. Hushkits reduce the power of the engines, though, so that in the case of some 727s winglets have been added to improve performance.

As Astrojets said, though, even hushkitted planes will eventually have to be retired. Concorde is (was) the only exception - it has an ICAO waiver which permits its continued service despite its extremely high noise levels. That is because it cannot not fly at supersonic speeds if hushkitted and, in any case, kitting it is not practical. The small numbers of them in service may also have been considered.

Trintocan.
Hop to it, fly for life!
 
OO-VEG
Posts: 1234
Joined: Mon Oct 02, 2000 5:31 pm

RE: Stage III Aircrafts

Sat Oct 21, 2000 5:58 pm

Nowadays every new (civil) aircraft is stage III, so will there be a stage IV sometime (or is there already a stage 4)??? That would be very handy for lots of airports who struggle with noise regulations.

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos