Quote:
Originally Posted by M3SQRD
I bet they are using nylon lock nuts? Nylon lock nuts can’t be used in spacecraft/space due to nylon high rate of outgassing in a vacuum. Either Nord-lock SS wedge-lock washers or wire-lock nuts/bolts. Third option is something called Vibra-tite which is a gummy coating you put on a portion of the threads on a fastener (it is different from loctite). However, a properly designed bolted joint should not lose preload under reversing (dynamic/cyclic) loads.
FYI, the Partee CF plenum uses bolted-on velocity stacks. Their full CF design is nice but I couldn’t stand their version with the Lexan window which they no longer make.
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This is what Bilal from Eventuri told me this week regarding the nuts they use:
"Also we are using Aerotight lock nuts which don't come loose under vibrations like the traditional nuts do."
I guess those are some type of aerospace grade nuts.
I'm with you on the Partee plenum, the one with the Lexan wouldn't appeal to me at all as I am an OEM+ kind of guy.
I'd rather stick with a company that has a known reputation when it comes to customer care.