Simon Mitchell did a really good presentation a few weeks ago on his dives with hydrogen but a lot of that was to deal with HPNS at extreme depth as...
Sadly no matter how many times this bullshit is put forward it is wrong. I agree with you about the talking shop and Johnson is a poor example in an...
Shrinkage is allowance made at the pattern stage; it is material dependant and can be any where between ~2-5% or even more (I`ve made lead moulds at...
I made by first ABLJ from a Davis submarine escape jacket, covered with a canvas jacket which I made and dyed orange, the filler was from an old twin...