Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Why No "Clarinet Look" On The 787?  
User currently offlineZippyjet From United States of America, joined Sep 2001, 5486 posts, RR: 13
Posted (9 years 1 month 3 days 8 hours ago) and read 5770 times:

Ok, so cast me into the eye of Hurricane Katrina if this has been covered before: Some MD 80 series, the 717 and of course the 777 have in place of a tail cone, a squared off Clarinet back. How come the 787 has deep sixed the Clarinet ending?


View Large View Medium
Click here for bigger photo!

Photo © Chris Coduto


View Large View Medium
Click here for bigger photo!

Photo © Mike Primamore




I'm Zippyjet & I approve of this message!
9 replies: All unread, jump to last
 
User currently offlineAeroWeanie From United States of America, joined Dec 2004, 1609 posts, RR: 52
Reply 1, posted (9 years 1 month 3 days 5 hours ago) and read 5685 times:
Support Airliners.net - become a First Class Member!

We call them screwdriver tails. The problem is that the rear end of the fuselage is also a good place to put the APU exhaust. On the 777 Boeing put the APU exhaust on the side of the screwdriver. It was found that this created a lot of ramp noise. On the 787, the APU exhaust placement and noise concerns won out and the fuselage won't end in a screwdriver tail.

User currently offlineVidens From Argentina, joined Mar 2004, 133 posts, RR: 0
Reply 2, posted (9 years 1 month 3 days 5 hours ago) and read 5674 times:

Isn't the screwdriver tail much better in terms of drag? I thought that's why modern airliners had them. (Of course A320, A330, and A340 aircraft don't).
I would have thought that fuel burn would win over ramp noise...
Obviously I'm wrong... Anybody care to explain?

Thanks!



Travel? Why would i travel if I can watch it on TV?
User currently offlineHAWK21M From India, joined Jan 2001, 31684 posts, RR: 56
Reply 3, posted (9 years 1 month 3 days ago) and read 5629 times:


Any Latest Actual pics on the B787.Apart from the Nose section.
regds
MEL



Think of the brighter side!
User currently offlineAeroWeanie From United States of America, joined Dec 2004, 1609 posts, RR: 52
Reply 4, posted (9 years 1 month 2 days 21 hours ago) and read 5602 times:
Support Airliners.net - become a First Class Member!

Quoting Videns (Reply 2):
Isn't the screwdriver tail much better in terms of drag?

The screwdriver tail provides a 1% drag reduction on the MD80.


User currently offlineVirginFlyer From New Zealand, joined Sep 2000, 4575 posts, RR: 41
Reply 5, posted (9 years 1 month 2 days 20 hours ago) and read 5584 times:

MEL - take a look at http://www.boeing.com/commercial/7e7/photos.html which has a side on view of the 787 in its final configuration, complete with the 767 style tailcone...

V/F



"So powerful is the light of unity that it can illuminate the whole earth." - Bahá'u'lláh
User currently offlineStarlionblue From Greenland, joined Feb 2004, 17055 posts, RR: 67
Reply 6, posted (9 years 1 month 2 days 19 hours ago) and read 5556 times:

Quoting AeroWeanie (Reply 4):
Quoting Videns (Reply 2):
Isn't the screwdriver tail much better in terms of drag?

The screwdriver tail provides a 1% drag reduction on the MD80.

Aeroweanie is of course better versed in aerodynamics, but I would think the 767 and 330/340 tailcones are a bit more advanced than the original DC-9 ones.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineAeroWeanie From United States of America, joined Dec 2004, 1609 posts, RR: 52
Reply 7, posted (9 years 1 month 2 days 18 hours ago) and read 5544 times:
Support Airliners.net - become a First Class Member!

Quoting Starlionblue (Reply 6):
Aeroweanie is of course better versed in aerodynamics, but I would think the 767 and 330/340 tailcones are a bit more advanced than the original DC-9 ones.

Yes, the 1% is comparing the original DC-9 tailcone, which wasn't too great, with the MD80 screwdriver tail. The 767 style contraction to the APU exhaust is probably pretty decent too. The idea of the screwdriver tail is that you need a bit less contraction vertically and you provide an unambiguous trailing edge.


User currently offlineN766UA From United States of America, joined Jul 1999, 8294 posts, RR: 23
Reply 8, posted (9 years 1 month 2 days 8 hours ago) and read 5396 times:

Clarinet? That one's new to me. I've always known it as the screwdriver. To answer the question, though, all airplanes are different. The 787 is probably designed in such a way that, aerodynamically, it doesn't need the screwdriver. I'm not an engineer so I can't say why but... that's the most likely reason.


This Website Censors Me
User currently offlineMD-90 From United States of America, joined Jan 2000, 8508 posts, RR: 12
Reply 9, posted (9 years 3 weeks 4 days 9 hours ago) and read 5068 times:

I play clarinet, and I've never thought of it that way before. (a lovely French product, the LeBlanc Concerto). It does sort of look like a clarinet mouthpiece, if you discount the top of the cone (under the tail).

Top Of Page
Forum Index

Reply To This Topic Why No "Clarinet Look" On The 787?
Username:
No username? Sign up now!
Password: 


Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)


Similar topics:More similar topics...
Why No "Clarinet Look" On The 787? posted Wed Aug 31 2005 03:19:40 by Zippyjet
"descend On The Ils" Question posted Mon Sep 25 2006 21:42:28 by JulianUK
What Exactly Is, "Flying On The Step"? posted Sun Mar 21 2004 20:41:05 by Msllsmith
The Outside-look Cameras On The Airbus posted Sat Jan 7 2006 01:13:22 by 7E7Fan
Why The "wheel" On Landing Gear Levers? posted Fri Mar 3 2006 11:52:41 by Slinker
"I Just Got A Windshear Warning On The System" posted Fri Dec 2 2005 18:55:23 by Julesmusician
Why No V2500 On The A318 posted Sat May 28 2005 13:52:30 by HAWK21M
Concorde's "bulge" On The Vertical Fin Question posted Wed Sep 29 2004 15:19:57 by StudentFlyer
Why No Winglets On The 777? posted Sun Sep 12 2004 12:19:58 by Regis
A Yellow "hole" On The 737 Wing posted Tue May 18 2004 23:31:59 by Tg 747-300

Sponsor Message:
Printer friendly format