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Thanks! The RC sits on to of the sealing ring, which is in my case, is a 2" threaded coupler.
The flame tube is just that...a chamber for the combustion.
Yes, must have a blower. The seemingly oversize Ametek blower takes the place of the compressor section of a turbine engine.
This is by no means a jet engine. It is merely a jet combustion chamber...twisted into a new job.
-Scott