John_Hasler

joined 1 year ago
[–] [email protected] 1 points 1 month ago

The viscosity of hot water is much lower.

[–] [email protected] 8 points 6 months ago (3 children)

Curvature is well defined for manifolds with any number of dimensions. "Flat" in this context means "zero curvature", not "two dimensional".

[–] [email protected] 3 points 6 months ago

It's been asserted that they were used for water but I know of no evidence that they actually were.

Texas regulations require that the design for a methane storage system be done by a registered professional engineer certified to do methane storage systems in Texas and be submitted for approval before construction starts. Thus it's unlikely that they were "too close together". More likely they just didn't work right. Perhaps they had an excessive boiloff rate or too high a leakage rate.

Speculation: Perhaps they decided to build their own tanks because lead times for purchased tanks were too long. It worked out for LN2 and LOX.

I wonder why they have not recycled the suborbital tanks?

[–] [email protected] 5 points 6 months ago (2 children)

They're now cutting up the shell of one of the vertical methane tanks. They managed to suck all the perlite out when we weren't looking.

[–] [email protected] 1 points 6 months ago

But there's a guy up on one of the veritcal tanks working on the lifting rings so perhaps Zack is right.

[–] [email protected] 2 points 6 months ago (1 children)

That looks like a long reach from where it's parked.

[–] [email protected] 6 points 6 months ago (3 children)

The LR11000 has moved into the space near gate D2 where they recently demolished the storage sheds. I think it's there to handle the last three horizontal tanks (unless it's just there to compact the new asphalt...)

[–] [email protected] 1 points 6 months ago

Kathy Lueders said that this month is unlikely but seems to think that there's a chance for January. I'll go with that.

[–] [email protected] 2 points 6 months ago

I think that a launch this year is still possible but I wouldn't want to give odds. I think that before the end of January is likely. It would be cool for it to happen on my birthday but I'd rather see it earlier.

[–] [email protected] 1 points 7 months ago

"Runs the risk" means it might happen, not that it will happen. When he said that Starlink was committed to switching to the version two satellites and F9 was not expected to be able to launch them. They would have missed their FCC deadlines. However, they were able to develop the "shrunken" Starlink2 that fits on F9. I also think that both the F9 launch cadence and Starlink sales have exceeded expectations.

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