View Full Version : RB211 Question
MrHorgy
1st Jan 2006, 11:39
For those of you who are "au fait" with this engine, can you answer a question?
They sometimes appear to windmill on the ground, is this because of the, well, the wind? or are they powered to keep oil flowing round the engine?
Horgy
Mr @ Spotty M
1st Jan 2006, 13:33
Its all in the wind.:ok:
barit1
1st Jan 2006, 13:57
Not limited to RB's - any big-fan engine will do the same.
Krystal n chips
1st Jan 2006, 16:46
Unless you stuff a couple of chocks down the intake of course-:confused: as did some erstwhile--coughs--"engineers at a regional outpost" a few years ago---and leave them in when you come to start the donk :eek:
What causes the tick tick tick noise while the fans are freewheeling, do the blades have some play in them while cold and on the ground ??
barit1
3rd Jan 2006, 01:55
You got it.
Swedish Steve
3rd Jan 2006, 15:10
The RB211-535C has mid span clappers which clack as they fall over as the blade passes over TDC. RB211-22B and -524B are the same.
The newer RB211-535E and the RB211-524G/H have wide chord fan blades. These do not have clappers and do not clack.
Dr Illitout
4th Jan 2006, 13:10
Re cocks used to stop the fan rotating. It was done at the same operators main base too!!! When you are lying in the cold stream duct changing a componant, the clackerty-clackarty-clack drives you mad.
Rgds Dr I.
Hand Solo
4th Jan 2006, 14:45
Re cocks used to stop the fan rotating. It was done at the same operators main base too!!! When you are lying in the cold stream duct changing a componant, the clackerty-clackarty-clack drives you mad.
Rgds Dr I.
It's a brave man who uses cocks to stop the fan rotating!:eek:
Krystal n chips
4th Jan 2006, 16:02
The good Doctor is pefectly correct here--on both points--hence the, er benefit of a walk round prior to start up ? ;)
Dr Illitout
5th Jan 2006, 09:25
Obviously when I did it I used the approved RR fan gagging tool and made the appropriate entry in the tech log.
Rgds Dr I
Krystal n chips
5th Jan 2006, 10:04
Of course you did Doctor, as indeed did I. The approved tool was always readily available in any good Line tool store as is only to be expected :confused: ---;)
TURIN
11th Jan 2006, 17:44
So let me get this right.
A "cock" is an approved "gagging tool" Dr I?:eek:
Time to send this thread off to JB methinks.;)