Moderators: richierich, ua900, PanAm_DC10, hOMSaR
ikolkyo wrote:IIRC it’s a wear strip for if the fan moves around a little bit it can chip on that instead of bare metal. I believe the PW4000 and other engines have this feature.
Yeastbeast wrote:Is there a reason why that is the color of choice? And, is wear/expansion/imbalance not predictable enough for the wear strip to not be needed?
airportugal310 wrote:I believe the official term is "abradable lining/liner" but could be wrong
StereoTechque wrote:airportugal310 wrote:I believe the official term is "abradable lining/liner" but could be wrong
You are absolutely right. Also called Attrition liner.
Pretty much present on all Turbofans but much more evident on IAE/PWs.
CarlosSi wrote:You mean it's not a mint-scent so the jet blast doesn't smell as bad ?
diverted wrote:StereoTechque wrote:airportugal310 wrote:I believe the official term is "abradable lining/liner" but could be wrong
You are absolutely right. Also called Attrition liner.
Pretty much present on all Turbofans but much more evident on IAE/PWs.
I've always known it as an abradable shroud, but I'm splitting hairs
Horstroad wrote:The Fan Blade Rubstrip (or Abradable Shroud or Attrition Lining or whatever they're called by other manufacturers) is in the plane of the fan blades. In the pictures of that PW1000G series engines it would be the light gray ring behind the teal colored ring. The teal colored ring should be acoustic liners, noise absorbing panels which line the inside of the fan case.
rjsampson wrote:So back to OP's question? Why blue? Does it also have acoustic dampening properties (perforations, etc.) as the differently colored lining ahead of it?
F27500 wrote:CarlosSi wrote:You mean it's not a mint-scent so the jet blast doesn't smell as bad ?
What a great idea!! LOL
jacrowley48 wrote:F27500 wrote:CarlosSi wrote:You mean it's not a mint-scent so the jet blast doesn't smell as bad ?
What a great idea!! LOL
Not sure what y'all are talking about. I love the smell of jet-a exhaust!
rjsampson wrote:
I was really surprised that posters were suggesting that the teal liner was an attrition/abradable lining. As you point out, the teal material extends many inches ahead of the fan. So it's not that, folks!
rjsampson wrote:Why blue?
fr8mech wrote:rjsampson wrote:Yes, it is. I suspect the reason the liner extends forward of the fan is based on the structure of the engine. Based on pictures I've seen, the inlet cowl mounting surface is several inches forward of the fan. In order to install an abradable ling only in the path of the blades, an additional flange would have to be incorporated. Simpler this way.
Just my 35 years worth of 2 cent experience.
I humbly stand corrected, and defer to your proven expertise, sir! So then I suppose that suggests that the answer to my previous question:Horstroad wrote:rjsampson wrote:Does it also have acoustic dampening properties (perforations, etc.) as the differently colored lining ahead of it?
It's a honeycomb core panel with a perforated face sheet. Its purpose is noise reduction.
rjsampson wrote:
Does the this attrition lining extending past the fan, also have the same acoustic dampening properties as the inlet liner forward of the teal liner?
fr8mech wrote:rjsampson wrote:
I was really surprised that posters were suggesting that the teal liner was an attrition/abradable lining. As you point out, the teal material extends many inches ahead of the fan. So it's not that, folks!
Yes, it is.
Horstroad wrote:
No It's not
StereoTechque wrote:The black inlet cowl also has visible holes on surface for Accoustic dampening.
Horstroad wrote:
No It's not