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sturmovik
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B-1B Lancer Question

Wed Aug 29, 2012 7:33 pm


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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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bigjku
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RE: B-1B Lancer Question

Wed Aug 29, 2012 7:50 pm

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.
 
chuchoteur
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RE: B-1B Lancer Question

Wed Aug 29, 2012 7:57 pm

I think:

Crew escape hatches for offensive and defensive systems operator ejection seats.
4-man crew...
 
135mech
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RE: B-1B Lancer Question

Wed Aug 29, 2012 9:01 pm

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]
135Mech
 
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Cadmus
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RE: B-1B Lancer Question

Wed Aug 29, 2012 9:04 pm

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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Cadmus
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RE: B-1B Lancer Question

Wed Aug 29, 2012 9:16 pm

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?
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135mech
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RE: B-1B Lancer Question

Wed Aug 29, 2012 9:18 pm

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]
135Mech
 
rc135x
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RE: B-1B Lancer Question

Wed Aug 29, 2012 10:03 pm


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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.
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Cadmus
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RE: B-1B Lancer Question

Wed Aug 29, 2012 10:14 pm

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.
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LTC8K6
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RE: B-1B Lancer Question

Thu Aug 30, 2012 4:09 am

 
checksixx
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RE: B-1B Lancer Question

Thu Aug 30, 2012 4:49 am

That is correct...chaff/flare dispensers.
 
HaveBlue
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RE: B-1B Lancer Question

Thu Aug 30, 2012 4:59 am

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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LTC8K6
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RE: B-1B Lancer Question

Thu Aug 30, 2012 5:02 am

Something to do with the swing wings and air flow?
 
HaveBlue
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RE: B-1B Lancer Question

Thu Aug 30, 2012 5:10 am

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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checksixx
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RE: B-1B Lancer Question

Thu Aug 30, 2012 7:27 am

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
 
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sturmovik
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RE: B-1B Lancer Question

Thu Aug 30, 2012 12:49 pm

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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135mech
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RE: B-1B Lancer Question

Thu Aug 30, 2012 6:09 pm

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]
135Mech
 
HaveBlue
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RE: B-1B Lancer Question

Thu Aug 30, 2012 9:57 pm

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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