Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
LAX Runway Tunnel-1/3 Of 747 Wing+engine Hang Over  
User currently offlineHeyWhaTheHay From , joined Dec 1969, posts, RR:
Posted (6 years 3 months 3 weeks 5 days 7 hours ago) and read 5650 times:

For you LAX locals.....

Have you ever driven north bound on Sepulveda, and had the good fortune to enter the tunnel RIGHT as a 747 was traveling along taxi way alpha above you? ( believe it is A).

As you enter the tunnel and the aircraft is above you, almost 1/3 of the wing, and the entire outside engine hangs over the roadway below. Pretty cool. I looked up thru my sunroof just as I traveled below it.

Question.....although the aircraft was traveling very slow( and I am sure has to)...could the jet blast at higher speeds ever cause problems with the vehicles below?

To you guys that fly to LAX, is that the correct taxi way, and are there speed or special restrictions for that "over pass" ???

Thanks,

Hey

ps. I apologize in advance if this is in the wrong category. It seems to me it should be here, but feel free....

12 replies: All unread, jump to last
 
User currently offlineVikkyvik From United States of America, joined Jul 2003, 10027 posts, RR: 26
Reply 1, posted (6 years 3 months 3 weeks 5 days 5 hours ago) and read 5607 times:
Support Airliners.net - become a First Class Member!



Quoting HeyWhaTheHay (Thread starter):
To you guys that fly to LAX, is that the correct taxi way, and are there speed or special restrictions for that "over pass" ???

'Tis indeed taxiway Alpha:

http://204.108.4.16/d-tpp/0805/00237AD.PDF

Quoting HeyWhaTheHay (Thread starter):
Question.....although the aircraft was traveling very slow( and I am sure has to)...could the jet blast at higher speeds ever cause problems with the vehicles below?

I would say that's very doubtful. The engine is probably a good 40 feet above the Sepulveda Blvd. roadway. The high-velocity core flow from an engine will slow down rapidly as you move outward radially from the engine center.

Take a look at the following document from Boeing - it shows jet exhaust velocities measured at distances behind the aircraft:

http://www.boeing.com/commercial/airports/acaps/7474sec6.pdf

If I had to guess, I'd say you'd feel a wind of no more than ~25 mph from a 747 passing overhead. Of course, those diagrams are predicated on the aircraft being on constant level ground - not with the wing hanging over the edge of a bridge  Smile



"Two and a Half Men" was filmed in front of a live ostrich.
User currently offlineHeyWhaTheHay From , joined Dec 1969, posts, RR:
Reply 2, posted (6 years 3 months 3 weeks 4 days 16 hours ago) and read 5430 times:

VERY interesting reading. Thank you for passing that on, Vikkyvik.

So can I assume there are no special restrictions for that taxiway? Also, do you know what the width is of alpha?

Hey


User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 68
Reply 3, posted (6 years 3 months 3 weeks 4 days 16 hours ago) and read 5420 times:

I walked through the Sepulveda tunnel once. Once!

I guess that is not a sidewalk. It looked like a sidewalk but it was only a foot or so wide. I walked from the terminal to a car rental place at Sepulveda and West Imperial. Scared hell out of me. Buses went past so close their mirrors made my left ear flutter!

The west side of that lot must have been a good place to watch airplanes - if you were allowed to loiter. Seems like there was some higher ground and you could look over the fence back then.

Any old crew here ever stay at the Cockatoo on Imperial? Colorful place.



Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offlineVikkyvik From United States of America, joined Jul 2003, 10027 posts, RR: 26
Reply 4, posted (6 years 3 months 3 weeks 4 days 15 hours ago) and read 5400 times:
Support Airliners.net - become a First Class Member!



Quoting HeyWhaTheHay (Reply 2):
So can I assume there are no special restrictions for that taxiway? Also, do you know what the width is of alpha?

I don't know about restrictions. But it looks to be a 75 foot wide taxiway.



"Two and a Half Men" was filmed in front of a live ostrich.
User currently offlineHeyWhaTheHay From , joined Dec 1969, posts, RR:
Reply 5, posted (6 years 3 months 3 weeks 4 days 9 hours ago) and read 5317 times:

wow....thats crazy. With a 211 foot wingspan, I'm guessing the center line is offset to the north over more concrete/asphalt. Other wise thats 60' feet of overhang? That can't be. Is my math wrong?

Hey


User currently offlineVikkyvik From United States of America, joined Jul 2003, 10027 posts, RR: 26
Reply 6, posted (6 years 3 months 3 weeks 4 days 7 hours ago) and read 5294 times:
Support Airliners.net - become a First Class Member!



Quoting SlamClick (Reply 3):
I guess that is not a sidewalk. It looked like a sidewalk but it was only a foot or so wide. I walked from the terminal to a car rental place at Sepulveda and West Imperial. Scared hell out of me. Buses went past so close their mirrors made my left ear flutter!

Haha, yep, pretty sure that is not a sidewalk! Damn, I wouldn't have chanced that.

Quoting HeyWhaTheHay (Reply 5):
wow....thats crazy. With a 211 foot wingspan, I'm guessing the center line is offset to the north over more concrete/asphalt. Other wise thats 60' feet of overhang? That can't be. Is my math wrong?

On a normal 75 foot taxiway, a 744's wingtip would be 68 feet outside the edge of the taxiway (not counting shoulder).

Take a look on Google Maps or Google Earth. You can see pretty well the taxiway's relation to the edge of the bridge.



"Two and a Half Men" was filmed in front of a live ostrich.
User currently offlineLAX25R From United States of America, joined May 2008, 53 posts, RR: 0
Reply 7, posted (6 years 3 months 3 weeks 3 days 6 hours ago) and read 5107 times:



Quoting HeyWhaTheHay,reply=2 So can I assume there are no special restrictions for that taxiway?:

Good evening all. I've been reading on here for a long time now but only now posting for the first time.

According to the airport information on airnav.com, it looks that there are no aircraft restrictions on Taxiway Alpha (the Southern Most taxiway over the tunnel) or Charlie (the Northern most over the tunnel). Though as I'm sure you know from driving Sepulveda under the runways, traffic does slow down quite a bit when a 747 is taxiing overhead


User currently offlineAA61Hvy From United States of America, joined Nov 1999, 13977 posts, RR: 57
Reply 8, posted (6 years 3 months 2 weeks 2 days 11 hours ago) and read 4801 times:

I love driving through that tunnel when I go to work then of course all of the DL and HA 767s that are parked right north of the tunnel.

Though stupid LA city workers have that right lane moving at a snails pace...



Go big or go home
User currently offlineNewdan From United States of America, joined May 2008, 24 posts, RR: 0
Reply 9, posted (6 years 3 months 2 weeks 2 days 11 hours ago) and read 4793 times:

i live in Los Angeles, i have never noticed this...next time i am on Sepulveda im going to check it out.


a signature is soo cool!
User currently offlineVikkyvik From United States of America, joined Jul 2003, 10027 posts, RR: 26
Reply 10, posted (6 years 3 months 2 weeks 2 days 10 hours ago) and read 4779 times:
Support Airliners.net - become a First Class Member!



Quoting AA61Hvy (Reply 8):
I love driving through that tunnel when I go to work then of course all of the DL and HA 767s that are parked right north of the tunnel.

 checkmark 

Drove through it on Monday. There was a FedEx MD-10 (or DC-10...) on taxiway alpha. But I hit a red light coming off the 105 West offramp, so I only got to watch it taxi by from a few hundred feet away.



"Two and a Half Men" was filmed in front of a live ostrich.
User currently offlineHeyWhaTheHay From , joined Dec 1969, posts, RR:
Reply 11, posted (6 years 3 months 2 weeks 2 days 7 hours ago) and read 4757 times:



Quoting SlamClick (Reply 3):
I walked through the Sepulveda tunnel once. Once!

I guess that is not a sidewalk. It looked like a sidewalk but it was only a foot or so wide. I walked from the terminal to a car rental place at Sepulveda and West Imperial. Scared hell out of me. Buses went past so close their mirrors made my left ear flutter!

Many many moons ago, when I was a kid, we use to ride our BIKES through the tunnel ! ( Mom of course didn't know) .IScary as heck, especially when you entered the "turn outs" It is most definetly a sidewalk sized, but was only put there for emergency use, like if you break down. It has several "turn outs", and the sidewalk follows it.

The tunnel also used to be much shorter, forget what years they extended it.

Last friday i almost had another chance encounter, believe it was a Virgin A340, it had just barely cleared the overpass, when I went through. The sight of the overhang is amazing.

I must be living right.



Hey


User currently offline2H4 From United States of America, joined Oct 2004, 8955 posts, RR: 59
Reply 12, posted (6 years 3 months 2 weeks 2 days 6 hours ago) and read 4751 times:
AIRLINERS.NET CREW
DATABASE EDITOR



Quoting SlamClick (Reply 3):
I walked from the terminal to a car rental place at Sepulveda and West Imperial. Scared hell out of me. Buses went past so close their mirrors made my left ear flutter!

Sounds like Neil Page on Planes, Trains, and Automobiles.

2H4



Intentionally Left Blank
Top Of Page
Forum Index

Reply To This Topic LAX Runway Tunnel-1/3 Of 747 Wing+engine Hang Over
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
Shockwave Over 747 Wing posted Thu Apr 17 2008 13:23:43 by UAL747
Should Boeing Had Kept The 747 Wing At 40 Degrees? posted Mon Apr 16 2007 04:01:23 by 747400sp
747 Wing Slats? posted Mon Apr 2 2007 19:07:02 by Steve332
Stowed Position Of 747 Body Gear? posted Sun Mar 25 2007 21:36:06 by PC12Fan
Exact Boeing 747-400 Engine Data? posted Thu Aug 24 2006 18:26:05 by Qantas744ER
Minimum Runway Length For 747 posted Wed Aug 9 2006 00:17:07 by Boston92
Funny Orange Cords On Top Of MD88 Wing posted Sun Jul 9 2006 03:10:32 by BuyantUkhaa
Rotor Wing - Engine Run posted Thu Nov 11 2004 12:26:49 by HAWK21M
Name Of The Configuration Of 747 posted Thu Nov 4 2004 18:15:46 by Checkerboard
What Part Of The Wing Is This.. posted Mon Sep 6 2004 06:58:42 by Jfkaua

Sponsor Message:
Printer friendly format