With advancements in additive manufacturing, the manufacture of regeneratively cooled thrust chambers is simpler nowadays.
Brooklyn based startup Launcher Space Inc. says most 3D printed engines use less conductive materials such as Inconel, compromising the cooling capability.
'They are moving to copper to have best performance engine' .
Also most of the high performance engines like RD-107 use a copper inner liner. Other highly conductive materials that are being used are aluminium alloys.
Is it even possible to maintain the wall temperature at a safer limit with a less conductive material like Inconel ?