Recent Topics
2013 Ford Fiesta 15,000 mile OCI
by harboz
10/18/17 06:36 PM
Sulfated ash and carbon deposits...
by d00df00d
10/18/17 05:43 PM
Honda 1.5T
by Danh
10/18/17 04:27 PM
PROTUNE #AIO22500 150~ miles CUT OPEN
by car51
10/18/17 04:13 PM
EVAP emissions monitor not ready
by mclasser
10/18/17 02:54 PM
2018 Chevy Silverado or 2018 Toyota 4 Runner
by zfasts03
10/18/17 02:52 PM
My car has been sitting for a year
by llmercll
10/18/17 02:07 PM
AltiMAX Arctic vs AltiMAX Arctic 12
by EdwardC
10/18/17 02:00 PM
How to remove powder coating?
by garlicbreadman
10/18/17 01:56 PM
Brad Penn 10w40 UOA ( New bottle)
by s2krunner
10/18/17 01:27 PM
Total Oil Facebook Amazon 25% discount
by HappyLittlePony
10/18/17 11:55 AM
What field of study/job path would you recommend?
by renegade_987
10/18/17 11:46 AM
Suburban 2500
by dogememe
10/18/17 11:40 AM
First Hand Experience with LSPI Destroying Engine?
by jcartwright99
10/18/17 11:33 AM
Tire Rebate - Ebay $100 Off
by Greg L
10/18/17 10:43 AM
Student Loan Scams
by MolaKule
10/18/17 10:15 AM
Conklin Products?
by 2012AccentSE
10/18/17 10:08 AM
RIP Gord Downie
by Lolvoguy
10/18/17 09:57 AM
2005-2006 4runner v6 towing capability
by mjk
10/18/17 09:52 AM
Dexos 1 or Dexos 2 for Chevy Sonic?
by WyrTwister
10/18/17 08:18 AM
Newest Members
Bieben, djslikrick, Route_66, Coltman, root
63154 Registered Users
Who's Online
89 registered (a1mfw, 2015_PSD, alphadog, 4WD, andyd, A310, 7 invisible), 2086 Guests and 14 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
63154 Members
66 Forums
272435 Topics
4522512 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#3195286 - 11/22/13 10:09 PM RB211 side smoke?
crinkles Offline


Registered: 05/28/07
Posts: 5557
Loc: earth
We took a flight from Johannesburg to Sydney recently on Qantas Flight 64. It is operated by a 747-400 with Rolls-Royce RB211-524G-T engines.

We were sitting on the right outside window, and could see engine #4 (and none other). On taxi we noticed smoke coming from a port on the side of the engine. Swirling, not jetting. This continued during takeoff, and climbout, but obviously became a smoother stream on climbout.

It is disconcerting to see this at the start of a 12 hour flight across the Southern Ocean (Went down to 51 degree south). I assumed they knew what they were doing though...

The smoke was white, probably oil related? As the sun set pretty quick after climbout, didn't pay it a second thought. Taxiing on the ground in Sydney, the swirling smoke was still billowing out.

Was this engine burning oil? does it need a seal replacement?

Here is a good photo, on a different airline though, but same port - just under the Rolls Royce decal.

http://www.airliners.net/photo/Cathay-Pa...732b0b51c77ef00

http://www.gcmap.com/mapui?P=jnb-syd


Edited by crinkles (11/22/13 10:16 PM)

Top
#3195307 - 11/22/13 10:54 PM Re: RB211 side smoke? [Re: crinkles]
expat Offline


Registered: 05/12/09
Posts: 5267
Loc: Canada
"It is disconcerting to see this at the start of a 12 hour flight across the Southern Ocean (Went down to 51 degree south). I assumed they knew what they were doing though...

The smoke was white, probably oil related?"

It's British, it's supposed to do that.

Top
#3195324 - 11/22/13 11:20 PM Re: RB211 side smoke? [Re: crinkles]
MolaKule Offline


Registered: 06/05/02
Posts: 18304
Loc: Iowegia - USA
The Rolls-Royce RB211-524G-T is the more fuel efficient version of
the RB211 with a Trent Hot core section and an extra bleed valve.

I suspect the bleed was actually steam.

Or else it needs a serious head gasket replacement. grin2 oilburner
_________________________
I love rumors. I find out so much more about me that I didn't even know. smile

Top
#3195398 - 11/23/13 07:08 AM Re: RB211 side smoke? [Re: MolaKule]
JetStar Offline


Registered: 10/02/08
Posts: 1499
Loc: Flatlands of Indiana
My first thought was a bearing sump vent, but I don't know RR engines very well.
_________________________
My weakness is I love all motorcycles regardless of brand
2016 Suzuki DR650
2015 Road Glide
2007 Yamaha FZ1
1978 Suzuki GS1000 (now 1085)

Top
#3195474 - 11/23/13 08:33 AM Re: RB211 side smoke? [Re: crinkles]
Astro14 Offline


Registered: 10/10/10
Posts: 7819
Loc: Virginia Beach
Oil vent most likely.

But jet engines hold quite a bit of oil and the pilots have oil pressure, oil temperature and oil quantity gauges. The aircraft monitors those parameters as well...to provide warning if a parameter reaches an alert or critical level. The airline monitors consumption and does analysis on the oil.

So, nothing to worry about, frankly.
_________________________
32 Packard 15W40
02 Volvo V70 T5 0W40 M1
02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 TGMO

Top
#3196435 - 11/24/13 09:01 AM Re: RB211 side smoke? [Re: crinkles]
Cujet Offline


Registered: 02/15/03
Posts: 6363
Loc: Jupiter, Florida
Absolutely normal for rolls engines. They use pressurized labyrinth seals, with no mechanical seal at all. The outboard vent you see is much the same as a crankcase vent going overboard on a car, instead of a PCV system. It will show oil vapor. In cruise flight, it seals very well and little oil is lost.

Other manufacturers do it differently and you don't see the oil mist.

On our company jet, a G550, both Br710 engines have oil vapor swirling about at idle. I think it looks cheap. But, oil consumption is nil, so it must be as effective as any other system.


Edited by Cujet (11/24/13 09:04 AM)
_________________________
Turbo's rule.

Top
#3197213 - 11/25/13 12:53 AM Re: RB211 side smoke? [Re: crinkles]
crinkles Offline


Registered: 05/28/07
Posts: 5557
Loc: earth
Thanks guys. Great Info. Would the amount of venting be different from engine to engine? This is the first time I've seen it. Perhaps that engine was a bit more worn?

Top
#3197714 - 11/25/13 01:25 PM Re: RB211 side smoke? [Re: crinkles]
Astro14 Offline


Registered: 10/10/10
Posts: 7819
Loc: Virginia Beach
Yes, the venting will vary from engine to engine...these things all have large sumps, scavenge pumps, air/oil coolers, fuel/oil coolers, etc...pretty robust oil systems to feed the bearings oil at a nice, stable temperature and pressure....
_________________________
32 Packard 15W40
02 Volvo V70 T5 0W40 M1
02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 TGMO

Top
#3210283 - 12/08/13 10:57 AM Re: RB211 side smoke? [Re: JetStar]
Propflux01 Offline


Registered: 09/26/02
Posts: 3300
Loc: Arkansastan
Originally Posted By: JetStar
My first thought was a bearing sump vent, but I don't know RR engines very well.


My thinking as well (labyrinth seal). I've seen that a lot on T-56, but out the combined bottom drain.
_________________________
2014 Hyundai Elantra
2014 Hyundai Elantra GT

A 55 Gallon Drum And A Shovel Can Solve A lot of Life's Little "Problems"

Top
#3218072 - 12/16/13 04:59 AM Re: RB211 side smoke? [Re: crinkles]
john_pifer Offline


Registered: 07/08/12
Posts: 1431
Loc: Nashville, TN via Memphis
The RB-211 bankrupted RR. They'd be outta business today had the Brit govt not bailed them out.
_________________________
16 WRX - PPPP
07 Tacoma V6 - M1 EP 5W-30, 182K, 10K OCIs
07 Yamaha R1 - Rotella T6 5W-40, Bosch 3300
07 Yamaha YZ-250, Klotz, Rotella


Top