To cut the inside radius for the combustion chamber flare 2, it was difficult to cut such a tight radius neatly using an angle grinder so I tried cutting it out using a hole saw on the advice of my dad but this wouldn't cut through the metal so ended up cutting a rough radius slightly smaller than the desired one and I can just flatten the top of the cone once rolled with a belt sander or something to give the desired diameter.
On the longer pieces such as the combustion chamber and tailpipes which I had my worries about being able to roll into a cone, to twist the metal in the rollers to ensure a cone is rolled, we slackened the rollers, twisted them, re-tightened them, and then rolled a bit more.
A fair amount of brute force was needed to marry the edges up.
All of the pieces are now tacked in shape; they just need the seams welding up and then all welding together and it'll be ready for fitting the fuel rod to.
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