Here is rocket engine drawing. The combustion chamber made from copper and the outer shell from stainless steel. The coolant, either water or gasoline will be between
(source: wonderhowto.com)
With either pressurised water or propellant, used as the coolant how can these two components be hermetically joined? Can I use welding or something else to create a sealed join between steel and copper?
I can't use rubber seals because of the heat produced by the combustion chamber. I thought about a threaded connection. Can it be used here? Or maybe there is a better way to join the two?