757 Wake

[mbw]

Why is the 757 wake considered one of the worst/strongest ones?

 

[Gofish]

Ever been in trail of one? Not a pleasant experience.

 

[Irishav8r]

I used to fly the J-41 and while on the arrival into Dulles, approach descended a UAL 757 over top of us to our Alt of 4000' with 5 mi seperation. Clam wind day, autopilot on, and the Flight Attendant picking up trash. The airplane shuttered a little then a gentle bank to the left followed by an extremely violent right bank. Nearly hit 40 degrees, due to the Autopilot disengaging and lost about 900' of altitude. (I'm not very quick on the controls I guess) Flight Attendant went airborne in the back, hit her head but she was ok. When we notified Dulles Approach (At that time, now Potomic) they tried to have us climb back to the previously assigned altitude with same seperation. Obviously, we didn't do that. Very bad Mama but so is pretty much anything bigger than you!

BTW: Sure is a pretty airplane!

 

[JethroF15]

The word is that this was/is a big concern for FedEx. They pack all the AC as close as possible coming into MEM on any given night. Guess that they have finally worked something out with the announcement of the 757 buy this week.

 

[skiandsurf]

Why is the 757 wake considered one of the worst/strongest ones?

About 12 years ago, my friend John McDaniels was flying a westwind jet into SNA. He was flying the top people for In 'n Out burgers. They got behind a 757 and the rest is history.

I was flying a RJ into ORD one night, and ATC put us right behind a Mexicana. I could see on the TCAS that we were only 2.5 to 3 miles in trail. I asked the controller what type was the Mexicana. The contoller replyed, "727". The Mexicana came right back and said, "we are 757". Just about that time the plane rolled over about 45 degrees. We recovered (obviously) and initiated a climb. Filled out a NASA report.... 8 months later, I got a call from the NASA investigator.

 

[JethroF15]

About 12 years ago, my friend John McDaniels was flying a westwind jet into SNA. He was flying the top people for In 'n Out burgers. They got behind a 757 and the rest is history.

I was flying a RJ into ORD one night, and ATC put us right behind a Mexicana. I could see on the TCAS that we were only 2.5 to 3 miles in trail. I asked the controller what type was the Mexicana. The contoller replyed, "727". The Mexicana came right back and said, "we are 757". Just about that time the plane rolled over about 45 degrees. We recovered (obviously) and initiated a climb. Filled out a NASA report.... 8 months later, I got a call from the NASA investigator.

What a great name for a burger place... or any place for that matter!:nuts:

 

[Gofish]

Same thing happened to me in a EMB 145 one night in ORD. Rolled right about 50-60 degrees. Full left aileron and it still wanted to roll right. Scared the crap out of the passengers.

 

[skiandsurf]

What a great name for a burger place... or any place for that matter!:nuts:

You ever been to So Cal.....this is a landmark out here.

 

[JethroF15]

You ever been to So Cal.....this is a landmark out here.

Yea I've seen them on trips out to the left coast. A big grin appears on my face every time I see one. Too bad there arn't any back where I live.:bawling:

 

[CaptETWes]

Why is the 757 wake considered one of the worst/strongest ones?

I believe it's because the 757 has one of the cleanest and most-efficient wings of any aircraft. That is, there are few, if any protrusions on the wing to prevent the generation of wake turbulence as it moves out towards the wingtips. Furthermore, if you notice the climb out of 757 you'll see that it's steeper than most transports. Because of the higher angle of attack more lift is generated, thus, a 757's wake turbulence tends to last longer. Strong wake turbulence isn't just strong, it is also long-lasting.

 

[Propsync]

Sometimes when I'm at the dog park short of 1L in MKE, they actually land that runway and it's fun watching all the non-aviators going 'What the heck was that?' I have gathered countless hours of non-scientific info.

1. Most airplane wake descends at the same rate. No Kidding. That spot at the park is about 200'. It takes all of ten seconds for the wake to hit the ground.
2. CRJ wake takes longer, maybe 15 seconds.
3. The 757 takes a lot longer, I'd say 30 seconds.

Just like everyone else, we all know now that getting cozy with a 757 isn't a great idea. Seeing the longer delay at the park really has opened my eyes. I don't why it seems the wake hangs up longer for the 757, but it does.

 

[Amish RakeFight]

What a great name for a burger place... or any place for that matter!:nuts:

I've been to one once before out on the west coast somewhere. Food was good, but I recall being given some religious material while I waited for my order to be filled.

 

[Amish RakeFight]

I just found something on the religious connection to In-and-Out..

http://www.snopes.com/business/alliance/inandout.asp

 

[Itsallsogood]

we use to take the bumper sticker and remove the B and R. Changed it to "In-and-Out _URGE_."

 

[Fallingbrick]

Sometimes when I'm at the dog park short of 1L in MKE...

That’s not a dog park...it’s my lawn. Please stop, I'm sick of picking up crap. :angryfire

 

[Propsync]

Just put it in a paper bag and take it next door and light it on fire! Much fun!

 

[learflyer]

Wake turb is one of the biggest things still ignored by both ATC (not responsible) and pilots. Thunderstorms are the next one. Pilots still ignore the risks of taking off into the face of a TS. If the acft in front of us made it, well we can too!

 

[Donsa320]

I believe it's because the 757 has one of the cleanest and most-efficient wings of any aircraft. That is, there are few, if any protrusions on the wing to prevent the generation of wake turbulence as it moves out towards the wingtips. Furthermore, if you notice the climb out of 757 you'll see that it's steeper than most transports. Because of the higher angle of attack more lift is generated, thus, a 757's wake turbulence tends to last longer. Strong wake turbulence isn't just strong, it is also long-lasting.

Hmmm, I think that in a steady state climb or descent at 1G the lift on the wing would not change. During the change from level flight to a climb or descent there would be a slight increase or decrease momentarily until a steady state was established, no? If the lift were higher in a climb you would be doing a loop.

DC

 

[pianoman]

Part of the problem is that many of our planes (CRJ's, ERJ's) are at the low end of the "large" aircraft classification. Since the 757 is at the heavy end of "large", we can (and do) get spaced very tightly behind them, so we often get wake. If it is a true heavy we're behind, ATC has to give us more separation.

A good technique is to ask tower- well in advance- for 2 minutes delay if you're behind a 757.

 

[Gorilla]

I just found something on the religious connection to In-and-Out..

http://www.snopes.com/business/alliance/inandout.asp

Interesting: from the snopes text:

Those whom Bible verses make cross-eyed have far more to be concerned about from Alaska Airlines. That carrier places a Bible scripture card on every meal tray. Or Bess Eaton, the New England donut-and-coffee chain, which has Bible verses printed on its disposable cups.

Alaska guys, is this true? I have no probs with it, just curious.

 

[JAM-BRO]

With the winglets the 757 wake should be greatly reduced...

 

[Hose A. Jiminez]

we use to take the bumper sticker and remove the B and R. Changed it to "In-and-Out _URGE_."

i bet you lots of a$$, too.

 

[SoCentralRain]

When I was at Lakes driving the -1900 and Brasilia we just called the 757 "the shredder." We'd just fly a dot high. Most of the time that did the trick.

 

[Capt. X]

Part of the problem is that many of our planes (CRJ's, ERJ's) are at the low end of the "large" aircraft classification. Since the 757 is at the heavy end of "large", we can (and do) get spaced very tightly behind them, so we often get wake. If it is a true heavy we're behind, ATC has to give us more separation.

A good technique is to ask tower- well in advance- for 2 minutes delay if you're behind a 757.

Ya think

 

[Hagar17]

Dot High

When I was at Lakes driving the -1900 and Brasilia we just called the 757 "the shredder." We'd just fly a dot high. Most of the time that did the trick.

I confirm "dot high" is the trick behind a 75-

Used to land behind them all the time at Midway/AA in the F100

 

[flying4food]

Alaska guys, is this true? I have no probs with it, just curious.[/quote]

Yes, it's true, been doing that for years!!!