How come this can only go down a kilometer?! It's a six

>>8613221
You seem to have a handle on more information about this crafty than we do. Tell us more about it - what type of motors, how they're mounted, fuel or energy source....

>>8613226

Quit thatthat.

I'm just asking about plexiglass strength.

If I recall the Trieste had 5 inch thick plexiglass windows. It went down seven miles.

Now here is a submersible with a 6.5 inch thick plexiglass sphere.... And it isn't even rated for a half mile.

This is a math board, right?

You see how it doesn't add up?

>>8613234

common sense tells me that they use different types of glass

>>8613252

All the info I find says they both use acrylic.

Its a NGC issue.

(Not-glass components)

>>8613221
This is a difficult question to answer. part of the problem is the interface between the plexiglass sphere and the hatch for getting inside. This creates stress concentrations and places for cracks to start
>>8613234
And during descent the outer acrylic viewing pane cracked from the pressure

>>8613234
>I'm just asking about plexiglass strength.
No - you're asking about the whole system. Your original question was,
>>8613221
>How come this can only go down a kilometer?!
This "thing" is the whole machine., There's a lot more to it than the plexiglass bubble. The bubble may very well withstand deep dives, but other components may fail.

If you're just asking about plexiglass, ask it!

Okay, you eventually did.

>>8613221
Don't worry too much OP; we have aluminum oxynitride now.

>>8613286

The theory is that it wasn't from the pressure, it was the temperature difference and expansion/contraction between the contrasting extreme cold on the outside and warm inside.

Pressure didn't do it alone.

>>8613342
> temperature difference
No more than 40 celsius delta across that interface.

Go back to bed, child.