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What Is This Duct On Air Force One?  
User currently offlineAndz From South Africa, joined Feb 2004, 8469 posts, RR: 10
Posted (9 years 7 months 2 weeks 4 days 20 hours ago) and read 7660 times:
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What is that duct above the APU exhaust for?


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After Monday and Tuesday even the calendar says WTF...
18 replies: All unread, jump to last
 
User currently offlineFlyf15 From , joined Dec 1969, posts, RR:
Reply 1, posted (9 years 7 months 2 weeks 4 days 19 hours ago) and read 7653 times:

Thats not Air Force One first off, it is an E-4, not a VC-25. That is not actually a duct, it is a very long antenna that can be reeled out and trailed behind the aircraft.

User currently offlineAndz From South Africa, joined Feb 2004, 8469 posts, RR: 10
Reply 2, posted (9 years 7 months 2 weeks 4 days 19 hours ago) and read 7648 times:
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see I come here to learn. thanks.


After Monday and Tuesday even the calendar says WTF...
User currently offlineFutureUApilot From United States of America, joined May 2004, 1365 posts, RR: 4
Reply 3, posted (9 years 7 months 2 weeks 4 days 18 hours ago) and read 7608 times:

Wow, that's an interesting 747... what's the top little thing where the first class cabin for and what does that antenna do, is it just to get more radio reception?

-Sam



The Pilot is the highest form of life on Earth!
User currently offlineFokker Lover From , joined Dec 1969, posts, RR:
Reply 4, posted (9 years 7 months 2 weeks 4 days 16 hours ago) and read 7540 times:

I'm not an electronic expert, and don't have a clue to what all of those freaking antennas really do. So take that as the disclaimer that it is. I'm going to take a wild ass guess, and say if it is an antenna that reels out waaaayyyy behind the plane, it is a low frequency transmitter. I'm also going to guess that it would be used while circling in a pattern over the ocean while they transmit orders and information to submerged submarines.

If anybody can either confirm or deny this with fact, I'll gladly refund twice what you paid for my opinion. Because I am just guessing.


User currently onlineStarlionblue From Greenland, joined Feb 2004, 17186 posts, RR: 66
Reply 5, posted (9 years 7 months 2 weeks 4 days 14 hours ago) and read 7499 times:

Quoting Fokker Lover (Reply 4):
I'm not an electronic expert, and don't have a clue to what all of those freaking antennas really do. So take that as the disclaimer that it is. I'm going to take a wild ass guess, and say if it is an antenna that reels out waaaayyyy behind the plane, it is a low frequency transmitter. I'm also going to guess that it would be used while circling in a pattern over the ocean while they transmit orders and information to submerged submarines.

Fokker Lover nailed it. The antenna is for contacting subs. Very low frequency. It requires a long antenna. That's just physics. Some other planes have a similar arrangement. IIRC you circle to create a spiral of the antenna.

Quoting FutureUApilot (Reply 3):
what's the top little thing where the first class cabin

More antennas, including a dish under a fairing. and of course there's ECM equipment sprinkled around the airframe.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineBandA From United States of America, joined Aug 2004, 341 posts, RR: 0
Reply 6, posted (9 years 7 months 2 weeks 4 days 12 hours ago) and read 7459 times:

Since its mentioned already that this is not Air Force One, what is this particular aircraft used for? what are the differences between E-4 and a VC-25?

If this has been discussed before (the differences between e-4 and vc-25) I apologize, and would appreciate a link to such existing thread.



"They [Terrorists] never stop thinking about new ways to harm our country and our people, and neither do we." - GWB
User currently offlineMatt72033 From United Kingdom, joined May 2005, 1617 posts, RR: 4
Reply 7, posted (9 years 7 months 2 weeks 4 days 8 hours ago) and read 7405 times:

Quoting Starlionblue (Reply 5):
More antennas, including a dish under a fairing. and of course there's ECM equipment sprinkled around the airframe.

do you mean radar dish by this?
I always assumed it was some kind of auxiliary air intake! lol but from looking at the pictures closely I can see it clearly isn't

Matt


User currently onlineStarlionblue From Greenland, joined Feb 2004, 17186 posts, RR: 66
Reply 8, posted (9 years 7 months 2 weeks 4 days 3 hours ago) and read 7335 times:

Quoting BandA (Reply 6):
Since its mentioned already that this is not Air Force One, what is this particular aircraft used for? what are the differences between E-4 and a VC-25?

E-4 is NEACP (National Emergency Airborne Command Center, pronounced "kneecap") and serves as flying command post in time of war. Has full comms and command capability. Can be refueled in flight and all that jazz. The plan is for the president to be on it in case of an attack. There are 4 E-4s.

VC-25 is the plane commonly known as "Air Force One" (when the president is board). It is used for official travel and while it does have some comms and command capability, it is a representation vehicle and does not have the same military utility as the E-4. Has space for the press in the back. Can be refueled in flight although the pilots prefer to practice with the E-4s to avoid accidentally scratching the nose. There are 2 VC-25s.

Quoting Matt72033 (Reply 7):
do you mean radar dish by this?

I think it's more like a satellite comms dish.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineDIJKKIJK From France, joined Jul 2003, 1823 posts, RR: 4
Reply 9, posted (9 years 7 months 2 weeks 4 days 3 hours ago) and read 7323 times:

Say, I have a question. Do the VC25 or the E4 have any anti-missile defence capability? Can they be configured to fire missiles in case there is some attack while the president is on board?


Never argue with idiots. They will bring you down to their level, and beat you with experience.
User currently offlineOPNLguy From , joined Dec 1969, posts, RR:
Reply 10, posted (9 years 7 months 2 weeks 4 days 2 hours ago) and read 7293 times:

Quoting DIJKKIJK (Reply 9):
Do the VC25 or the E4 have any anti-missile defence capability? Can they be configured to fire missiles in case there is some attack while the president is on board?

I don't know about the E4s, but the VC25s have IR countermeasures (IRCM) installed with each of the engines, on the trailing edge of each engine pylon. Might be one on the APU exhaust as well. The ones on the VC25 are alot smaller than the ones on the old 707 (the IRCM on that one made look like an old 57 Caddy). I believe the NASA SCA 747s also have the IRCM stuff, the Shuttle being a national symbol and all.

Don't think there's anything the VC25 can launch; I supposed that'd be the job the any escort fighters. Don't know about the E4...


User currently offlineN766UA From United States of America, joined Jul 1999, 8378 posts, RR: 23
Reply 11, posted (9 years 7 months 2 weeks 3 days 23 hours ago) and read 7246 times:

Good luck getting an answer as to what 90% of the gizmos on that jet do... most of it's classified!

Also, I'm thinking the VC25 would have flares in addition to IRCM, etc.



This Website Censors Me
User currently offlineBandA From United States of America, joined Aug 2004, 341 posts, RR: 0
Reply 12, posted (9 years 7 months 2 weeks 3 days 22 hours ago) and read 7199 times:

Quoting Starlionblue (Reply 8):

Starlionblue, Thanks much for your response! Honestly I never knew there was a seperate NEACP aircraft. I thought whenever they mentioned NEACP they were referring to Airforce One! This also explains why I never saw that huge bulge on top of Airforce One on TV, since I am sure it doesnt have one like the NEACP aircraft.

Now I know, facinating stuff!



"They [Terrorists] never stop thinking about new ways to harm our country and our people, and neither do we." - GWB
User currently offlineSATL382G From , joined Dec 1969, posts, RR:
Reply 13, posted (9 years 7 months 2 weeks 3 days 21 hours ago) and read 7169 times:

Quoting Starlionblue (Reply 8):
E-4 is NEACP

The E-4 was the NEACP until the Soviet Union collapsed and the NEACP mission diminished severely. Now it is called the NAOC or National Airborne Operations Center.

http://en.wikipedia.org/wiki/NAOC

I'd suggest you repost this in Mil Av -- you're more likely to get an accurate response there.


User currently onlineStarlionblue From Greenland, joined Feb 2004, 17186 posts, RR: 66
Reply 14, posted (9 years 7 months 2 weeks 3 days 17 hours ago) and read 7092 times:

Ah thx SATL382G.
.
.
.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineGothamSpotter From United States of America, joined Jan 2005, 586 posts, RR: 0
Reply 15, posted (9 years 7 months 1 week 3 days 13 hours ago) and read 6525 times:

Most commonly referred to as "the Doomsday Plane". If the President ever has to board one of these birds, it means we're pretty well f---ked. Big grin

User currently onlineStarlionblue From Greenland, joined Feb 2004, 17186 posts, RR: 66
Reply 16, posted (9 years 7 months 1 week 3 days 12 hours ago) and read 6498 times:

Quoting GothamSpotter (Reply 15):
Most commonly referred to as "the Doomsday Plane". If the President ever has to board one of these birds, it means we're pretty well f---ked.

He might just need a haircut Big grin



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineSATL382G From , joined Dec 1969, posts, RR:
Reply 17, posted (9 years 7 months 1 week 3 days 3 hours ago) and read 6424 times:

Quoting GothamSpotter (Reply 15):
Most commonly referred to as "the Doomsday Plane". If the President ever has to board one of these birds, it means we're pretty well f---ked.

Not necessarily. Presidents have gotten orientation flights..... It hasn't been publicized since Carter did it though....


User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 18, posted (9 years 7 months 1 week 3 days 2 hours ago) and read 6430 times:

Quoting GothamSpotter (Reply 15):
Most commonly referred to as "the Doomsday Plane". If the President ever has to board one of these birds, it means we're pretty well f---ked.

What about Non serious Flights on board  Smile
regds
MEL



Think of the brighter side!
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