ERJ 145 question
11-26-2007, 07:37 AM
#1
Gets Weekends Off
Thread Starter
Joined APC: Nov 2006
Posts: 439
ERJ 145 question
Hello all:
I just have a quick question.
why is the leading edge of the 145 so damn rough.
It would seem to me at a quick glance it would be better to have a smooth leading edge?
Some of my reasons why it might not be...
it is thicker because of the heat of anti ice
or it is pitted from constant contact with clouds ice dust rain?
or it might have something to do with controling the stagnation point of the leading edge
can any one give me some insight
thanks
Reeves
I just have a quick question.
why is the leading edge of the 145 so damn rough.
It would seem to me at a quick glance it would be better to have a smooth leading edge?
Some of my reasons why it might not be...
it is thicker because of the heat of anti ice
or it is pitted from constant contact with clouds ice dust rain?
or it might have something to do with controling the stagnation point of the leading edge
can any one give me some insight
thanks
Reeves
11-26-2007, 07:53 AM
#2
Gets Weekends Off
Joined APC: Sep 2007
Position: Aeroplanes
Posts: 1,163
I'm not familiar with the ERJ wing, if whether you're talking about wear/tear or a design trait.
On the CRJ, new leading edges are nice, shiny, polished aluminum. The older ones have the feeling of fine grit sand paper, from the constant pattering of sand, ice, rain, etc.
On the CRJ, new leading edges are nice, shiny, polished aluminum. The older ones have the feeling of fine grit sand paper, from the constant pattering of sand, ice, rain, etc.
11-26-2007, 08:38 AM
#4
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Joined APC: Jan 2007
Position: CH2T Worst plane ever
Posts: 660
Could it have to do with boundary layers and adding some turbulence to smooth out the air just above it? I"m thinking something like a VG, but smaller? If I'm wildly off base, please someone correct me.
11-26-2007, 09:11 AM
#7
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Joined APC: Sep 2007
Position: Aeroplanes
Posts: 1,163
Whenever one of ours come out of the paint shop, the new leading edge they put on can be used as a mirror. Always gotta be looking my best, ya know. But the older ones look like somebody has sand blasted them with very coarse sand, or even pebbles. Oddly enough, that's exactly what has happened.
11-26-2007, 11:23 AM
#8
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Joined APC: Nov 2006
Position: ERJ-175
Posts: 217
Ours are that way - some polished, some rough, some "normal". Sometimes it's the whole l.e. that is polished, sometimes just a strip here and there. When they get rough mx will polish them to return the surface to a smooth condition. I'm sure there's probably a minimum thickness or similar before the l.e. has to be replaced altogether.
11-26-2007, 12:59 PM
#9
Gets Weekends Off
Joined APC: Oct 2006
Position: ERJ 145
Posts: 363
Originally Posted by reevesofskyking
Hello all:
I just have a quick question.
why is the leading edge of the 145 so damn rough.
It would seem to me at a quick glance it would be better to have a smooth leading edge?
Some of my reasons why it might not be...
it is thicker because of the heat of anti ice
or it is pitted from constant contact with clouds ice dust rain?
or it might have something to do with controling the stagnation point of the leading edge
can any one give me some insight
thanks
Reeves
I just have a quick question.
why is the leading edge of the 145 so damn rough.
It would seem to me at a quick glance it would be better to have a smooth leading edge?
Some of my reasons why it might not be...
it is thicker because of the heat of anti ice
or it is pitted from constant contact with clouds ice dust rain?
or it might have something to do with controling the stagnation point of the leading edge
can any one give me some insight
thanks
Reeves
It's definitely from running into all those clouds...look out...
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