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9 minutes ago, sevenperforce said:

Is this official?

As much as it feels like you really, really want an engine in the middle, putting them in a ring farther apart like this gives much better roll authority.

Not an official render, but it's going off what the BN1 aft dome spotted yesterday looked like:

EsmFxi0XYAETm51?format=jpg&name=large

 There appears to be space for 8 Raptors (though on this particular dome only 4 are plumbed in). I have a feeling the engines might be slightly closer together than depicted in that render, though.

Edit: Also:

 

 

Edited by RealKerbal3x
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I wonder how the plumbing will look for the 20 Raptor ring on the outside, and if they'll have to redesign for it. Also, is there just plumbing for up to 4 Raptors, or do they plan to have 4 Raptors instead of 2 for the first B1 flight?

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3 minutes ago, Spaceception said:

I wonder how the plumbing will look for the 20 Raptor ring on the outside, and if they'll have to redesign for it. Also, is there just plumbing for up to 4 Raptors, or do they plan to have 4 Raptors instead of 2 for the first B1 flight?

There is at least provision for 4 Raptors. Maybe plans have changed, or they intend to do more BN1 hops with more than 2 engines.

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2 hours ago, RealKerbal3x said:

Everyone's experienced the crushing disappointment when you realise Proton doesn't have six strap-on boosters :P

Little bit of overkill for short range rocket arty, don't you think?  With that angle of attack, the target can't be more than 30 miles! :D

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On 1/25/2021 at 11:37 AM, RealKerbal3x said:

Approximately 30 minutes until pad clear according to a launch pad announcement:

 

On my phone - what is the white structure currently off gassing? 

 

I can't read the text on the screen 

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Just now, JoeSchmuckatelli said:

On my phone - what is the white structure currently off gassing? 

That's SN7.2, the new test tank using 3mm thick steel. It's white because they've loaded liquid nitrogen to test the integrity of the tank.

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11 minutes ago, RealKerbal3x said:

That's SN7.2, the new test tank using 3mm thick steel. It's white because they've loaded liquid nitrogen to test the integrity of the tank.

Thanks.  I just watched the 7.1 fast replay.  Are they planning to pop this one as well? 

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Just now, JoeSchmuckatelli said:

Thanks.  I just watched the 7.1 fast replay.  Are they planning to pop this one as well? 

Probably, but it's likely they're just proof-testing it today. They'll most likely test to destruction at some point.

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SN7.2's vents have shut off, they may be going for a pop today!

51SRPH2.png

Edit: No pop, but the valves released quite suddenly and violently. Could have been a valve failure.

Edited by RealKerbal3x
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49 minutes ago, RealKerbal3x said:

SN7.2's vents have shut off, they may be going for a pop today!

Edit: No pop, but the valves released quite suddenly and violently. Could have been a valve failure.

The vents are off again.

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5 hours ago, sevenperforce said:

Is this official?

As much as it feels like you really, really want an engine in the middle, putting them in a ring farther apart like this gives much better roll authority.

1 fixed engine in the middle wouldn't interfere with the gimbaling at all. If it were a 310t version that's another ~3.5% Gross Launch Weight. 

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Regarding BN1, there's a pic on NSF of a thrust structure with 2 pairs of holes around the outside for plumbing I think.

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