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-   -   737-200 banked 87 deg? (https://www.pprune.org/questions/197395-737-200-banked-87-deg.html)

ALIBABBA 7th Nov 2005 11:33

Can somebody confirm or deny a rumour I heard of an incident in Italy recently where a 737-200 banked 87 deg.
I didn't think this was possible.

Was this fatigue or how did it happen (if it did). Didn't see it in the papers.

Dave Gittins 7th Nov 2005 12:21

737 Bank Angle
 
I suspect this is rumour rather than news and something so extreme would surely have become common knowledge by now and would presumeably have been an upset caused by extreme weather.

From a technical pont of view I wouldn't see why this should not be perfectly possible and if handled smoothly should have no adverse impact on the aeroplane - other than the mess that would have to be cleaned up from the pax !!!

I have seen video of the original 707 - the venerable Dash 80 - being put through a compete barrel role during one demonstration flight some decades ago.

I understand that the test pilot flying was quietly taken to one side and asked to refrain from further performances.

:ok: DGG

Global Pilot 7th Nov 2005 12:38

Dave,

I persume he was taken to one side after the rather cool manoeuvre was complete. During might have taken him thru another roll:-)

rgds,
GP>

Ranger 1 7th Nov 2005 12:50

Tex Johnston rolled the 707 nice pic of it open link & scroll down:E
http://www.707sim.com/texjohnston.html

Dave Gittins 7th Nov 2005 13:00

Tex Johnson
 
I couldn't remember Tex Johnson's name so thanks for the help Ranger 1 ... but note from the link, GP, that Tex apparently did roll it twice .. so you could just be correct..

I think the complete video - together with the comment about not doing it again on demo flights to prospective customers - was shown on a BBC series called "Reaching for the Skies" about 10 years ago. I certainly remember one sequence in the programme was of an Aero Commander being barrel rolled, while two USAF Generals in the back poured a cup of tea as the horizon slowly spun round, demonstating that there was positive G all the way round.

Sorry about the total thread hijack.

DGG

Dougle Mcguire 7th Nov 2005 13:05

Its True
 
Yes the above is true. Its not the bank angle that caused concern, it was the 300ish feet above ground that raised all those eyebrows.

captplaystation 7th Nov 2005 13:44

Doesn't make much difference but believe it was an 800,no doubt the full details will become public (like the Skavsta incident) once the IAA have investigated/unless the pilots were fatigued,in which case it will be OK for RYR to investigate and deal with it. . . Ha, Ha! Capt in Skavsta (if we recall) claims part of the reason he cocked-up was fatigue/stress,if you try and tell them you are fatigued,you get demoted. . . shome mishtake shurely.

Micky 7th Nov 2005 15:00

Tex johnson & BAnk 87 deg
 
Well If you look under aviationvideos.com there is the full 707 barrel role with a comment form Tex Johson:D cooooollll.....
Who was the guy who preformen barrel roles with a glas of water on the glare shield, with out spilling a drop??? Impressiv video!Was that also Tex j. or bob hoover???

Can you bank a airliner more then 78 deg in a cordinated turn (+2,5g)???With out causing excessiv stress to the airframe?

Cheers Micky

Ps keep on rolling...

:} :} :}

Wing Commander Fowler 7th Nov 2005 15:10

Oh dear Cptplayboy - the thread seems to have been hijacked by the 707 aerobatic display team..... Obviously an 800 at 300' performing a derry break doesn't excite 'em :rolleyes:

bentover 7th Nov 2005 15:10

737-800 500ft agl circle to land bad weather. 87 degrees bank. Report out soon.

Final 3 Greens 7th Nov 2005 15:20


737-800 500ft agl circle to land bad weather. 87 degrees bank
Please, someone, tell me that this is a sick joke?

Getoutofmygalley 7th Nov 2005 15:30

Is this by any chance the much referenced too, but never details quoted Rome Ciampino incident? :ooh:

Micky 7th Nov 2005 15:36

737-800 brake of at 87 deg
 
Well the thought of a 737 brake of with 87 deg is exciting... but that won't be sop now will it:ooh: :confused: :ooh:

Wycombe 7th Nov 2005 16:17

...there is some horrific footage out on the WWW somewhere of the results when a retiring B52 driver tried to pull a high AoB, low alt stunt at an airshow in the US.

High AoB, lowish speed, got the nose below the horizon, but not enough sky to recover :(

Sickening viewing

discostu 7th Nov 2005 16:26

Think you'll all find what your looking for here......

www.alexisparkinn.com/aviation_videos.htm

;)

chuks 7th Nov 2005 16:34

Bob Hoover can be seen pouring from a pitcher of iced tea into a glass set upon the glare shield while barrel-rolling a Rockwell Shrike ( a jazzed-up Aero Commander 500). This comes with a 'Warning! Kids! Don't try this at home!' label attached.

Some guys in Nigeria got a 727 over so far, perhaps not watching what they were doing while avoiding traffic, that they went in from something like 15 thousand feet in less time than it takes to tell about it. It would seem that some large transport-category aircraft can be unrecoverable from relatively modest attitudes. The author of 'Handling the Big Jets' goes into this in some detail.

captplaystation 7th Nov 2005 17:25

Getoutofmygalley, yes.

PaperTiger 7th Nov 2005 18:20

The COPA 737 which crashed 6/6/92 is believed to have rolled past 90deg and back several times before departing controlled flight. At a slow roll rate, it probably never execeeded 1g and hence the crew was unaware anything was amiss.

alf5071h 7th Nov 2005 21:40

Now there was an incident with a 737 in Europe, where during the cruise the crew forgot that they were fuel balancing – cross feed open.
At the next leg-change the autopilot (LNAV) had difficulty in completing the turn due to the significant control force offset previously used to hold the wings level.
The crew disconnected the autopilot, anticipating a balanced lateral control force, it was not.
The aircraft rolled beyond 87 deg before a recovery was made.

Also, as another scenario, consider ‘what if’ - a slat fails to retract during departure; the autopilot has difficulty in responding. The crew take over and fly manually, but are confused by the asymmetric control forces / offset stick position; their actions are transferred by illusion/error into the pitch control. The aircraft rolls and pulls into a tight turn at low level. (Flash?)

Try the scenarios above in the simulator; learn about ‘force’ illusions, the differences in stick / wheel position vs zero force position and how we often assume a constant relationship between them. Incorrect trim either due to trim input or external trim force can be a killer particularly in roll.

But of course pitch trim can lead to similar problems. An A310 crew overpowered the autopilot during a go around. The auto trim opposed the stick force and applied full nose up trim, the aircraft ‘stalled’ twice with 90 deg wing drop before recovering. (N.B. all aircraft should now be modified to prevent this happening again)
A310

punkalouver 8th Nov 2005 00:17

The A-310 video , I believe is from Interflug in Moscow quite a few years back and they didn't show all of it because if I remember correctly, it pitches up like that twice more.

chuks 8th Nov 2005 06:39

Here we go again with the old debate about 'hand-flying' skills vs. being able to speed-type commands into the FMS and never, ever needing to hand-fly since that must mean that someone made a boo-boo.

One that was a particular wake-up call was the so-called Roselawn accident in the States, when a load of ice accumulated while the aircraft was on autopilot in a holding pattern. When the autopilot released, having reached its force limit, 'twang!' went the ailerons and the airplane augered in. It turned out that the crew would have had to put in fairly massive amounts of roll force to get the wings level, when they assumed the ailerons were locked. It was after that one that recommendations about not using the autopilot in icing came out.

What I am getting at here is an obvious tendency to sit there and watch 'What's it doing now?' rather than jump in with a timely hand-flown intervention. There are arguments for and against this, of course, but the trend seems to be to sit and watch for perhaps too long. I have often had points deducted on simulator checks for perfectly correct control inputs simply because these were hand-flown.

I went on a European trip last weekend in a series of bizjets, with the last leg in a new Falcon 2000 EASI. It seemed that the (admittedly wonderful) cockpit technology took away a lot of attention from looking outside to see what was happening in the real world. Virtual reality ruled, there. Of course I am used to Africa, so that I am keeping an open mind about how it's done in Europe these days, when I have a lot to learn.

Bokkenrijder 8th Nov 2005 08:08


737-800 500ft agl circle to land bad weather. 87 degrees bank. Report out soon.
Heard a rumour about this from a mate: indeed probably Ryanair in CIA! :\

3 Point 8th Nov 2005 08:15

An interesting thread; I'm going to add a comment which I'm surprised nobody has already made:

AIRBUS!

A Fly by Wire Airbus could not have rolled to 87 deg (with the flight control computers functioning normally - lets not get into multiple failures just yet) nor would it require massive stick forces to combat any unusual icing or flap/slat configuration!

I agree with chuks; there is a tendency to sit typing stuff into the FMGS and wondering "what's it doing now?" but this is easily overcome by the company expounding a philosiphy of "I don't know what it's doing now so - autopilot off, flight directors off, fly the aeroplane"

If you fly for a company whose management can't see the value of this mindset either move or get promoted to management and change it!

Don't want to get into the usual Airbus vs Boeing argument here but I thought it worth pointing out that the incident which gave rise to this thread in the first place could not have happened in a digital FBW aeroplane with flight envelope protections written into the software - it's the future, no question about it!

Happy landings

3 Point

Phil Hudson 8th Nov 2005 16:44


it's the future, no question about it!
Yeah, FBW is the future.
We're becoming "button-pushers" .



***OMG the autopilot disconnected, we're all gonna die*** :}

ark 8th Nov 2005 22:45

have heard this one recently.
don't know how true it is but was told that it was B.A. or thomson.

the_hawk 9th Nov 2005 07:53

http://www.pprune.org/forums/showthr...hreadid=197543


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