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B-1B Lancer Question  
User currently offlinesturmovik From India, joined May 2007, 509 posts, RR: 0
Posted (2 years 2 weeks 6 days 6 hours ago) and read 8027 times:


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Photo © Kevin Scott - Jetwash Images


Just saw this image on the front page, and noticed two square-ish patches on top of the fuselage, behind the cockpit and in line with where the leading edge wing root meets the fuselage. Are they escape hatches of some sort? If they are, why are they placed so far aft?


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17 replies: All unread, jump to last
 
User currently offlineBigJKU From United States of America, joined Feb 2007, 881 posts, RR: 11
Reply 1, posted (2 years 2 weeks 6 days 6 hours ago) and read 8006 times:

The B-1 has 4 crew members. I believe those are the blow-off panels that allow the mission crew (2 dudes other than the pilot and co-pilot) to eject.

User currently offlinechuchoteur From France, joined Sep 2006, 764 posts, RR: 0
Reply 2, posted (2 years 2 weeks 6 days 6 hours ago) and read 8000 times:

I think:

Crew escape hatches for offensive and defensive systems operator ejection seats.
4-man crew...


User currently offline135mech From United States of America, joined Oct 2006, 412 posts, RR: 4
Reply 3, posted (2 years 2 weeks 6 days 5 hours ago) and read 7942 times:
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They are not escape hatches... as Cadmus states, the hatches are the smaller top hatches that are fwd of those two rectangles. (edited from before for corrections).

However, the crew members do not sit right next to each other. There's actually a rickety little bathroom/toilet and avionics equipment in between the Pilot and the systems operator behind him. The little window on the side is at the fwd edge of his "space". They have CRAMMED so much into that airframe, it's amazing that it all fits! LOL

Regards,

135Mech

[Edited 2012-08-29 14:17:02]

User currently offlineCadmus From United Kingdom, joined Jan 2004, 186 posts, RR: 0
Reply 4, posted (2 years 2 weeks 6 days 5 hours ago) and read 7939 times:

Every cutaway that I've ever seen has the crew all sitting together at the front - those panels/markings look to be too far aft.

If you look at this photo you can (just) make out what I would assume to be the escape hatch above the small gold tinted window above the unit badge:


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Photo © Tim Perkins




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User currently offlineCadmus From United Kingdom, joined Jan 2004, 186 posts, RR: 0
Reply 5, posted (2 years 2 weeks 6 days 5 hours ago) and read 7927 times:

Quoting 135mech (Reply 3):
Yes, they are the escape hatches for the :

Quoting chuchoteur (Reply 2):
Crew escape hatches for offensive and defensive systems operator ejection seats.
4-man crew...

I ran the inspection branch for them last year, here at Ellsworth AFB, SD.

Now that we've solved that, what are the hatches that I've referred to above?



Understanding is a three-edged sword
User currently offline135mech From United States of America, joined Oct 2006, 412 posts, RR: 4
Reply 6, posted (2 years 2 weeks 6 days 5 hours ago) and read 7922 times:
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Quoting Cadmus (Reply 4):
Every cutaway that I've ever seen has the crew all sitting together at the front - those panels/markings look to be too far aft.

They do not sit together. There is a bulkhead with a LOT of avionics equipment in between the front two pilots and the back enders...along with a really rickety toilet.

Quoting Cadmus (Reply 5):
Now that we've solved that, what are the hatches that I've referred to above?

I edited and corrected...read above. Apologies for the abrupt post.

[Edited 2012-08-29 14:19:37]

User currently offlinerc135x From , joined Dec 1969, posts, RR:
Reply 7, posted (2 years 2 weeks 6 days 4 hours ago) and read 7881 times:


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Photo © Alastair T. Gardiner - WorldAirImages



This photo shows the circular white spraylatted area above the OSO/DSO position next to the tiny fuselage window aft of the pilot's side window, the location of the ejection hatch. It is outlined on the B-1B in the background. The black rectangles are also visible much farther aft. I do not know their purpose.


User currently offlineCadmus From United Kingdom, joined Jan 2004, 186 posts, RR: 0
Reply 8, posted (2 years 2 weeks 6 days 4 hours ago) and read 7872 times:

Quoting 135mech (Reply 6):
Apologies for the abrupt post.

You have nothing to apologise for - your original reply was concise and factual and I certainly didn't draw any offence from it.



Understanding is a three-edged sword
User currently onlineLTC8K6 From United States of America, joined Jun 2009, 1209 posts, RR: 0
Reply 9, posted (2 years 2 weeks 5 days 22 hours ago) and read 7683 times:

Flare/chaff dispensers, I believe.

http://cdn-www.airliners.net/aviation-photos/photos/7/0/5/1517507.jpg

http://cdn-www.airliners.net/aviation-photos/photos/8/1/9/1188918.jpg

http://www.af.mil/shared/media/photodb/photos/100224-F-6911G-567.JPG

[Edited 2012-08-29 21:23:26]

[Edited 2012-08-29 21:24:05]

[Edited 2012-08-29 21:28:10]

User currently offlinechecksixx From United States of America, joined Mar 2005, 1095 posts, RR: 0
Reply 10, posted (2 years 2 weeks 5 days 21 hours ago) and read 7666 times:

That is correct...chaff/flare dispensers.

User currently offlineHaveBlue From United States of America, joined Jan 2004, 2108 posts, RR: 1
Reply 11, posted (2 years 2 weeks 5 days 21 hours ago) and read 7662 times:

Quoting LTC8K6 (Reply 9):
Flare/chaff dispensers, I believe.
Quoting checksixx (Reply 10):
That is correct...chaff/flare dispensers.

They are that, quite obviously from those last photos linked, which I did not know before this. My question is this though, why so far forward? I understand being topside IF they are that far forward so they don't get ingested into the engine intakes, but why not on the overly ample tail section where most combat aircraft have them? Its not like they are lacking room. Or because of the length of the B-1 compared to most attack aircraft would that put the heat emitted from the flares too far behind the engine exhaust?



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User currently onlineLTC8K6 From United States of America, joined Jun 2009, 1209 posts, RR: 0
Reply 12, posted (2 years 2 weeks 5 days 21 hours ago) and read 7659 times:

Something to do with the swing wings and air flow?

User currently offlineHaveBlue From United States of America, joined Jan 2004, 2108 posts, RR: 1
Reply 13, posted (2 years 2 weeks 5 days 21 hours ago) and read 7652 times:

Quoting LTC8K6 (Reply 12):
Something to do with the swing wings and air flow?

Perhaps, but the F-14, F-111 and not sure but the MiG-23/27 all had them in the back right? I know the 14 did for certain.



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User currently offlinechecksixx From United States of America, joined Mar 2005, 1095 posts, RR: 0
Reply 14, posted (2 years 2 weeks 5 days 18 hours ago) and read 7608 times:

Combat aircraft have them all over...not just in the tails. F-22...on the side behind the weapons bay. F-35...on the right side only.

Here is a shot of them being ejected...just prior to the shot linked above.

http://www.wired.com/images_blogs/dangerroom/2011/07/100224-F-6911G-503.jpg


User currently offlinesturmovik From India, joined May 2007, 509 posts, RR: 0
Reply 15, posted (2 years 2 weeks 5 days 13 hours ago) and read 7474 times:

Quoting checksixx (Reply 10):

That is correct...chaff/flare dispensers.

Thanks for the answers..  
I hadn't noticed the little window on the side, further back from the cockpit. Interesting that the remaining crew members are seated that far aft. You learn something new everyday..  



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User currently offline135mech From United States of America, joined Oct 2006, 412 posts, RR: 4
Reply 16, posted (2 years 2 weeks 5 days 8 hours ago) and read 7325 times:
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Quoting HaveBlue (Reply 11):
They are that, quite obviously from those last photos linked, which I did not know before this. My question is this though, why so far forward? I understand being topside IF they are that far forward so they don't get ingested into the engine intakes, but why not on the overly ample tail section where most combat aircraft have them? Its not like they are lacking room. Or because of the length of the B-1 compared to most attack aircraft would that put the heat emitted from the flares too far behind the engine exhaust?



I just spoke with one of the engineers, these planes do have problems with tail strike/damage on them from this. The design/intent was that they would be extensively "nose up" and be able to shoot them away while making an aggressive climb or deterrent move.

[Edited 2012-08-30 11:12:52]

User currently offlineHaveBlue From United States of America, joined Jan 2004, 2108 posts, RR: 1
Reply 17, posted (2 years 2 weeks 5 days 4 hours ago) and read 7240 times:

Quoting 135mech (Reply 16):
I just spoke with one of the engineers, these planes do have problems with tail strike/damage on them from this. The design/intent was that they would be extensively "nose up" and be able to shoot them away while making an aggressive climb or deterrent move.

Very interesting, thanks for that.  



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