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747 On Landing  
User currently offlineRendezvous From New Zealand, joined May 2001, 515 posts, RR: 0
Posted (13 years 3 weeks 2 days 4 hours ago) and read 1265 times:

While spotting today I noticed that the leading edge flaps inboard of the outer engines on the 747 retract on landing. I was wondering why this happens.

~Rdz

5 replies: All unread, jump to last
 
User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3697 posts, RR: 34
Reply 1, posted (13 years 3 weeks 2 days 3 hours ago) and read 1201 times:
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It's a throw back to when turbine reversers were fitted. It was to prevent FOD damage in that area. I am surprised to hear there are still a/c around with that system still operative.

User currently offlineRendezvous From New Zealand, joined May 2001, 515 posts, RR: 0
Reply 2, posted (13 years 3 weeks 2 days 3 hours ago) and read 1188 times:

Really? I saw several 747-400 aircraft doing this...

User currently offlineVC-10 From United Kingdom, joined Oct 1999, 3697 posts, RR: 34
Reply 3, posted (13 years 3 weeks 2 days 3 hours ago) and read 1185 times:
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Ah.............we are talking -400, I was talking Classic. The reason for the operation is the same however.

User currently offlineAir2gxs From , joined Dec 1969, posts, RR:
Reply 4, posted (13 years 3 weeks ago) and read 1107 times:

Yeah, I'm suprised any classic still has them. Every airplane we took out of the desert we de-activated that function.

I really thought it was an industry-wide, fleet-wide effort.



User currently offlineCx flyboy From Hong Kong, joined Dec 1999, 6573 posts, RR: 55
Reply 5, posted (13 years 2 weeks 6 days 23 hours ago) and read 1110 times:

We have that on our 747-400s when the thrust reversers are used. The indication in the cockpit is that the flap position indicator on the screen changes from green to magenta, and a few seconds after the reversers are closed, the indication goes back to green again as the leading edge reconfigures back to whatever the flap lever position is at.

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