Recent Topics
Cyber Monday good for computer prices
by oilboy123
9 minutes 49 seconds ago
AAARRRRRGGGGGGGGGGGG
GGGGGGGG!!!!!!!!!

by Oldmoparguy1
37 minutes 16 seconds ago
Ariens Snowblower Issue
by My442
Today at 02:31 PM
going back to green.
by chaindrive
Today at 02:29 PM
3rd time's the charm (Cruze water pump)?
by sciphi
Today at 12:58 PM
Netgear Nighthawk ac1900 router <90$ walmart YMMV
by Rand
Today at 12:33 PM
Barn car tires worth saving?
by subaru1991
Today at 12:32 PM
Dexos 1 Question
by Sierra048
Today at 12:08 PM
Black friday computer kit for me Deals
by oilboy123
Today at 11:46 AM
What fluid for my Acura TL 6MT SH-awd
by PeterGreen
Today at 11:08 AM
Purolator PSL24651, 6000 miles, Ram 4.7, M1 0w20
by 440Magnum
Today at 10:40 AM
E10 in 2013 Honda Accord sport
by Mark72
Today at 10:17 AM
Newest Members
GON, Jo5eph, Kernel, EdBurns, wolf9832
52014 Registered Users
Who's Online
73 registered (01_celica_gt, 05LGTLtd, 123Saab, asiancivicmaniac, 94astro, 10 invisible), 1677 Guests and 163 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
52014 Members
66 Forums
222720 Topics
3525910 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#3195286 - 11/22/13 10:09 PM RB211 side smoke?
crinkles Offline


Registered: 05/28/07
Posts: 5493
Loc: Australia
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: 3902
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: 14706
Loc: Iowegia
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
_________________________
Apparently some shoppers on black Friday will block and tackle better than your football team on Thanksgiving. smile

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


Registered: 10/02/08
Posts: 907
Loc: Flatlands of Indiana
My first thought was a bearing sump vent, but I don't know RR engines very well.

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


Registered: 10/10/10
Posts: 4619
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
90 4Runner 10W40 QS4X4
92 300E 5W40 LiquiMoly
02 Volvo V70 T5 0W40 M1
02 Volvo V70 XC 5W30 PU
05 MB S600 0W40 M1
06 Corolla 5W30 Edge

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


Registered: 02/15/03
Posts: 4317
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: 5493
Loc: Australia
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: 4619
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
90 4Runner 10W40 QS4X4
92 300E 5W40 LiquiMoly
02 Volvo V70 T5 0W40 M1
02 Volvo V70 XC 5W30 PU
05 MB S600 0W40 M1
06 Corolla 5W30 Edge

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


Registered: 09/26/02
Posts: 3151
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.
_________________________
2013 Hyundai Elantra- both killed by tornado
2013 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: 697
Loc: Nashville, TN via Memphis
The RB-211 bankrupted RR. They'd be outta business today had the Brit govt not bailed them out.
_________________________
07 Tacoma (1GR-FE) - M1 EP 5W-30, Fram Ultra
07 Yamaha R1 - Rotella T6 5W-40, Bosch 3300
07 Yamaha YZ-250
02 Yamaha YZ-250
01 Yamaha YZ-250

Top