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747SP Empennage  
User currently offlineBAe146QT From United Kingdom, joined exactly 8 years ago today! , 996 posts, RR: 0
Posted (7 years 5 months 4 weeks 1 day 21 hours ago) and read 1861 times:

Morning all.

Quick question - I know that, due to the shorter fueslage, the 747SP's vertical tail and rudder are enlarged (to make up for the shorter moment arm).

Is the same true of the horizontal surfaces?


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6 replies: All unread, jump to last
 
User currently offlineRendezvous From New Zealand, joined May 2001, 516 posts, RR: 0
Reply 1, posted (7 years 5 months 4 weeks 1 day 21 hours ago) and read 1848 times:

As far as I know it is, from what I've seen anyway.


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User currently offlineLegoguy From United Kingdom, joined Jun 2006, 3313 posts, RR: 39
Reply 2, posted (7 years 5 months 4 weeks 1 day 20 hours ago) and read 1839 times:

Quoting Rendezvous (Reply 1):

The top of the tail looks like it's smaller so does this mean that the 747SP's emmenage consists of a normal 747 tail fin with an extension of some sort on top?



Can you say 'Beer Can' without sounding like a Jamaican saying 'Bacon'?
User currently offlineDH106 From United Kingdom, joined Jun 2005, 626 posts, RR: 1
Reply 3, posted (7 years 5 months 4 weeks 1 day 20 hours ago) and read 1835 times:

Both the fin and tailplane are extended / increased in area to counter the shorter moment arm.


...I watched c-beams glitter in the dark near the Tanhauser Gate....
User currently offlineBAe146QT From United Kingdom, joined exactly 8 years ago today! , 996 posts, RR: 0
Reply 4, posted (7 years 5 months 4 weeks 1 day 17 hours ago) and read 1795 times:

Thank you, folks. Made sense that it would be bigger but I couldn't really tell.


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User currently offlineStarlionblue From Greenland, joined Feb 2004, 17044 posts, RR: 67
Reply 5, posted (7 years 5 months 4 weeks 1 day 17 hours ago) and read 1789 times:

Quoting Legoguy (Reply 2):
The top of the tail looks like it's smaller so does this mean that the 747SP's emmenage consists of a normal 747 tail fin with an extension of some sort on top?

Yes.


The rudder is also double hinged to give more deflection. If you look carefully you can see the split in the middle of the rudder.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineCCA From Hong Kong, joined Oct 2002, 836 posts, RR: 14
Reply 6, posted (7 years 5 months 3 weeks 11 hours ago) and read 1477 times:

I think they have done the same to the LCF


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