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What Naca Airfoil Type Does The 747-400 Use?  
User currently offlineFlybyguy From United States of America, joined Jun 2004, 1791 posts, RR: 1
Posted (6 years 7 months 1 week 6 days 1 hour ago) and read 13121 times:

Hello,

Just wondering if the NACA classifications are still used in airfoil design for modern airliners or are new airfoils designed uniquely and entirely from scratch?

If the NACA classification is used... what NACA classification does the 747-400 use?


"Are you a pretender... or a thoroughbred?!" - Professor Matt Miller
4 replies: All unread, jump to last
 
User currently offlineZeke From Hong Kong, joined Dec 2006, 7725 posts, RR: 73
Reply 1, posted (6 years 7 months 1 week 6 days 1 hour ago) and read 13118 times:

Dont think you will fond they are NACA ones at all, they are Boeing propriety ones. I think they have about half dozen, called the BAC463, BAC464, BAC465, BAC466, BAC467 and BAC468.

Some data exists for them about the place as the 747 has been as a research model for some time.

A good site to work out sections is http://www.ae.uiuc.edu/m-selig/ads/aircraft.html


We are addicted to our thoughts. We cannot change anything if we cannot change our thinking – Santosh Kalwar
User currently offlineOly720man From United Kingdom, joined exactly 9 years ago today! , 6183 posts, RR: 11
Reply 2, posted (6 years 7 months 1 week 5 days 23 hours ago) and read 13093 times:

Modern swept wing commercial aircraft do not have the same section across the span. And no, they're not NACA sections.

The likelihood of finding any section data on the more recent aircraft is quite remote because the wing is the "top secret" bit of any aircraft. It's where lift is made and drag is, hopefully, lost and you're not going to tell the enemy how you did it.


Man City p3 w3 d0 l0 f4 a0 P9 - hey it may never happen again!
User currently offlineFlybyguy From United States of America, joined Jun 2004, 1791 posts, RR: 1
Reply 3, posted (6 years 7 months 1 week 5 days 13 hours ago) and read 13003 times:

Thanks for the replies guys... you've helped a great deal.  

[Edited 2006-10-13 03:31:47]


"Are you a pretender... or a thoroughbred?!" - Professor Matt Miller
User currently offlineL-188 From United States of America, joined Jul 1999, 29350 posts, RR: 62
Reply 4, posted (6 years 7 months 1 week 5 days 12 hours ago) and read 12994 times:

Short answer is that it doesn't.

Most airlines in that catagory will use custom designed airfoil and often times a continuosly changing one.

That way the manufacturer will be able to "tune" the airfoil for the aircraft they are developing.


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