Thinktank Revision 2.0

[3.0charlie]

PRC is from the company's name: PPg / (PRC) Desoto. Their line of adhesives - sealants starts with PR. Just like RTV (Room Temperature Vulcanizing) is a trademark of GE Silicones, now Momentive.

[sswilson]

Originally Posted by 3.0charlie

PRC is from the company's name: PPg / (PRC) Desoto. Their line of adhesives - sealants starts with PR. Just like RTV (Room Temperature Vulcanizing) is a trademark of GE Silicones, now Momentive.

I was thinking about that after I'd posted the "PRC" comment. It's funny how certain names get used as a generic term no matter who is making it.

PRC, RTV, and LPS are the most common we use, and they all describe actual brand names rather than the required mil spec. (Sometimes that's an issue when we're trying to get a new supplier and we've got to go digging to find the actual mil spec that the original requirement called for).

[3.0charlie]

hehe, been there - done that, since the same goes for some fasteners: Hi-loks, CherryMax, etc... both related to the actual name of the product, since they are called mechanical rivets.

[BrainEater]

Wow......Thanks again John , and thank your wife for me too.

Your find has really helped me out a lot.

I hav'nt heard back regarding the compatiblity data on the PR1665 , but I just realized : I need an adhesive that'll just tolerate cold (i.e. iso resistance not required).....for the dewar seal and the vacuum piping seals , and the pr1665 fits the bill quite nicely !

I'll be ordering some ASAP.

Thank You ,

Ross



ps....PM

[3.0charlie]

My pleasure Ross. And you are quite right regarding the compatibility, if indeed it is strictly for vacuum sealing purposes.

John

PS. PM replied to...

[BrainEater]

I talked to PPG on friday . Apparently , 'technical support' does not know if it's resistant to isopropanol....hehehe....

They are getting back to me again next week.

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I have done more looking into the whole 'Cryogenic adhesive' thing , and have found another candidate :

Foster 82-77 ...This one says right there it's resistant to solvents.


There is some interesting reading on this subject.These are the kinds of adhesives that hold stuff together in the liquid fuel tanks of the space shuttle.They are actually tested by repeated dunking in liquid nitrogen , then boiling water , back to liquid nitrogen etc......after 10 dunks it holds strength.Pretty impressive group of adhesives.

I'm not sure why I originally only considered the 'Silicone' class of adhesives.I do know about the 'Urethane' class of adhesives.I've used them many times.
I guess some lessons need to be learned more than once.hehe

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So there's only 1 major hurdle now.The pump , and I 'm about 80% this one's manageable as well.I'm going to some in depth research on the specs of fuel transfer pumps , and I'm still going to play around with the one I'm trying to build.

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I'm going to start getting the mobo tray/top built.I'm reusing the original thinktank one , but it needs modification.

I will probably put the rig itself together just to make sure all the parts work.The cpu and mobo are fine I'm pretty sure , but the ram is RMA return so who knows.

[mattlef]

this worklog is effing insane..
I'm pumped to see the results, as this is one hell of a massively epic project. I had to look up half the shit you guys where taking about so I could understand what was going on.

Best of luck!

[3.0charlie]

Foster? I taught that was an Australian beer...

[encorp]

I'm waiting for a post from you where someone complains to the RCMP that you're building an ify contraption that explodes :P Hahaha "Umm so apparently they think I'm a terrorist of sorts" j/k haha

[mattlef]

lol as long as he doesnt go out and buy a shit load of fertalizer and desiel fuel he wont get anyone bothering him. lol