Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Comet Flap AOA  
User currently offlineFaro From Egypt, joined Aug 2007, 1551 posts, RR: 0
Posted (7 years 4 weeks 1 day 17 hours ago) and read 1557 times:

On the following photograph:


View Large View Medium
Click here for bigger photo!

Photo © Ralf Manteufel



it seems the inboard flaps are extended at over 70°. Assuming a nominal 5° angle of attack, this makes over 75° incidence with respect to prevailing airlflow. Did the air still follow the flap surface at this incidence or was it "unsticking"?

Faro


The chalice not my son
1 replies: All unread, jump to last
 
User currently offlineDH106 From United Kingdom, joined Jun 2005, 626 posts, RR: 1
Reply 1, posted (7 years 4 weeks 1 day 17 hours ago) and read 1548 times:

The quick answer is that it didn't.

The inboard flaps you refer to are actually split type flaps positioned under the engine tail pipes and not designed to keep flow attached. The mid/outer flaps are 'plain' flaps (no slots or fowler movement).
On plain flaps like those the flow won't remain attached after something like 20-30deg depending on shape and other variables. Modern flaps use slots / multiple segments to encourage flow to stay attached over greater angles.
I've always thought the Comet had pretty large 'barn door flaps'. Perhaps since it's a first generation jet it's engines idled fairly fast and had high residual thrust - which would necessitate large drag flaps for the approach. Just a theory.



...I watched c-beams glitter in the dark near the Tanhauser Gate....
Top Of Page
Forum Index

Reply To This Topic Comet Flap AOA
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...
What Is This Flap On The DC10 For? posted Sat Jul 28 2007 01:52:21 by NEMA
B-720 And B-720B Flap-Question posted Fri Jul 20 2007 21:37:06 by Blackbird
A380 Flap Settings posted Tue Jul 17 2007 22:11:52 by Aeroman444
B752 Alternate Flap/slat U/s posted Tue Jul 17 2007 10:03:48 by HAWK21M
Size Of A380 Flap Fairings posted Mon Jul 9 2007 09:58:20 by FWI747
A320 TE Flap Transmission Fairing Static Wicks. posted Wed Jul 4 2007 21:34:59 by HAWK21M
Airbus A320series Flap Retraction. posted Sun Jun 24 2007 03:43:06 by FutureATP
CRJ Flap Sounds posted Sun Jun 17 2007 07:52:56 by Jetwash
Flap Extention Questions posted Fri May 25 2007 06:15:46 by Blackbird
DeHavilland Comet V posted Fri May 18 2007 03:54:28 by Blackbird

Sponsor Message:
Printer friendly format