What Are Those "Things" On The Tail? — Tech Ops Forum

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What Are Those "Things" On The Tail?

Bozo From Germany, joined Nov 2005, 170 posts, RR: 0
Posted (7 years 6 months 1 week 6 days 21 hours ago) and read 3323 times:

hi,
first of all sorry if its the wrong forum but as i'm new, i'm not very familiar with all those sections Wink

my question is, what are those red marked things for?

Virtus Et Honor - S.P.Q.R.

12 replies: All unread, jump to last

CRJonBeez From United States of America, joined Nov 2004, 317 posts, RR: 4
Reply 1, posted (7 years 6 months 1 week 6 days 21 hours ago) and read 3287 times:

#1 appears to be vortex generators, used to assist in aerodynamics and better lift if i'm not mistaken

#2 are static wicks, used to discharge static in the air due to friction while in flight

Fanofjets From United States of America, joined Apr 2000, 1895 posts, RR: 3
Reply 2, posted (7 years 6 months 1 week 6 days 20 hours ago) and read 3202 times:

Number one is correct - the thingies on that 737 are indeed vortex generators, designed to improve the air flow around the tail area.

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The aeroplane has unveiled for us the true face of the earth. -Antoine de Saint-Exupery

Mr Spaceman From Canada, joined Mar 2001, 2780 posts, RR: 15
Reply 3, posted (7 years 6 months 1 week 6 days 19 hours ago) and read 3121 times:

Hi guys.

>> Bozo, here's a link with a lot of good info about Static Discharge Wicks when they were being discussed in this forum in the past. These posts should answer most or all of your questions about those wicks ...... I hope. Big grin

http://www.airliners.net/discussions/tech_ops/read.main/127631/a

Here's some good info from previous discussions about Vortex Generators too.

Check out the link provided by AAR90 in reply #5.

http://www.airliners.net/discussions/tech_ops/read.main/69195/a

Chris Smile

"Just a minute while I re-invent myself"

Rev3oh2 From United States of America, joined Apr 2004, 141 posts, RR: 1
Reply 4, posted (7 years 6 months 1 week 6 days 17 hours ago) and read 3074 times:

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While we're on the subject of aircraft protrusions, are the little shark-fins seen on some commercial jet engines there for a similar purpose, vortex generation? Or something else?

...let us run with perseverance the race marked out for us.

Fr8Mech From United States of America, joined Sep 2005, 4259 posts, RR: 12
Reply 5, posted (7 years 6 months 1 week 6 days 16 hours ago) and read 3045 times:

Quoting Rev3oh2 (Reply 4):
While we're on the subject of aircraft protrusions, are the little shark-fins seen on some commercial jet engines there for a similar purpose, vortex generation? Or something else?

These are called 'chines' and are found, I believe, exclusively on GE engines. They help smooth the airflow over the leading edge after being disturbed by the engine.

When seconds count...the police are minutes away!

HAWK21M From India, joined Jan 2001, 31201 posts, RR: 58
Reply 6, posted (7 years 6 months 1 week 6 days 14 hours ago) and read 2999 times:

Quoting CRJonBeez (Reply 1):

CRJonBeez is correct.

Quoting Fr8Mech (Reply 5):
These are called 'chines' and are found, I believe, exclusively on GE engines. They help smooth the airflow over the leading edge after being disturbed by the engine.

Why only on GE Engines.What did they notice that others did not.
What about V2500s
regds
MEL

Think of the brighter side!

AeroWeanie From United States of America, joined Dec 2004, 1601 posts, RR: 52
Reply 7, posted (7 years 6 months 1 week 6 days 14 hours ago) and read 2981 times:

Quoting Fr8Mech (Reply 5):
These are called 'chines' and are found, I believe, exclusively on GE engines.

Not so - this is a NWA A320 (with V2500s) and it has nacelle chines on the inboard side of the nacelles:

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The real story is that Douglas had the patent on using two nacelle chines:

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That is why Boeing used single, inboard chines (and this aircraft has P&W engines):

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Photo © Nicholas A Vollaro

VC-10 From United Kingdom, joined Oct 1999, 3677 posts, RR: 37
Reply 8, posted (7 years 6 months 1 week 6 days 14 hours ago) and read 2973 times:

Quoting AeroWeanie (Reply 7):
Not so - this is a NWA A320 (with V2500s) and it has nacelle chines on the inboard side of the nacelles:

NWA a/c have CFM 56's

AeroWeanie From United States of America, joined Dec 2004, 1601 posts, RR: 52
Reply 9, posted (7 years 6 months 1 week 6 days 13 hours ago) and read 2964 times:

Quoting VC-10 (Reply 8):
NWA a/c have CFM 56's

Ooops, I thought "if its NWA, it must have engines that P&W are involved with", hence V2500s. Oh well, look at the 767 I show. I did check on this one. Its an ex-Qantas airplane and their -200s had P&Ws. And... this is a V2500 powered A320 (I checked this time):

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Photo © Mark Bess

[Edited 2005-11-13 06:16:01]

HAWK21M From India, joined Jan 2001, 31201 posts, RR: 58
Reply 10, posted (7 years 6 months 1 week 6 days 13 hours ago) and read 2964 times:

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Think of the brighter side!

FredT From United Kingdom, joined Feb 2002, 2184 posts, RR: 26
Reply 11, posted (7 years 6 months 1 week 6 days 5 hours ago) and read 2874 times:

Chines and vortex generators do the same job though, and for much, but not exactly, the same purpose. Enjoy the read!

I thought I was doing good trying to avoid those airport hotels... and look at me now.

CCA From Hong Kong, joined Oct 2002, 708 posts, RR: 14
Reply 12, posted (7 years 6 months 1 week 6 days 4 hours ago) and read 2851 times:

GE

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