33lspotter
Topic Author
Posts: 546
Joined: Tue Jul 22, 2014 2:37 pm

Boston 4R Approach Question

Mon Mar 30, 2015 5:22 pm

Probably a dumb question, but it's been bugging me and I figured I'd ask: how close does the wing or landing gear of, say, a 747 on final for 4R get to the nearest Massport cranes?

Last year, coming back from LHR on BA213, operated by 744 G-CIVF, I videotaped our approach and landing to Runway 4R; yes, I know I clearly positioned the camera the wrong way.  

When I was watching the video again, I noticed that we came what seemed awfully close to the Massport cranes—it almost seemed like the landing gear would hit the crane. And while it's obvious that we didn't make contact with the crane, I wondered if there is some kind of regulation for how close planes can be to the cranes. Furthermore, I can't imagine the cranes would have been placed in a spot where the aircraft would be at risk on approach from 4R or departure from 22L/22R (I haven't seen many planes land runway 4L.) Can anyone shed insight?

[Edited 2015-03-30 10:25:12]
 
alphaomega
Posts: 267
Joined: Fri Aug 26, 2005 1:26 pm

RE: Boston 4R Approach Question

Mon Mar 30, 2015 5:26 pm

Simple, they fly the published approach and no issues.

Massport does monitor the ship height of vessels passing in and out of the port, which can restrict or hold arrivals to 4R similar to a draw bridge, but thats the only real restriction.
 
Cactus105
Posts: 31
Joined: Mon Jan 19, 2009 7:16 pm

RE: Boston 4R Approach Question

Mon Mar 30, 2015 5:53 pm

Quoting alphaomega (Reply 1):
Simple, they fly the published approach and no issues.

Yep. If you take a peek at The ILS for 4R @ BOS, it is apparent that the Glideslope crosses said crane in between MILTT and the Middle Marker (MM). I also took a peek at google earth, and measured from the threshold to the shipping yard, and its around 1 mile. This specific Glide slope is 3.0 Degrees, which is standard. A general rule of thumb is 333' of descent per Mile for this angle. So as an estimate, the aircraft is somewhere in the neighborhood of 300-350 feet above the ground (or water) at this point in the approach.

http://155.178.201.160/d-tpp/1503/00058IL4R.PDF
Wherever you go, there you are.
 
33lspotter
Topic Author
Posts: 546
Joined: Tue Jul 22, 2014 2:37 pm

RE: Boston 4R Approach Question

Mon Mar 30, 2015 6:21 pm

Very cool. Thank you both for your insight.

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