I do not know much about the RCS engines. I did run across a web-page awhile back where a modeler had modified a Typhoon 2+2 for the RCS.
I would think you would have to keep the weight and size down to about 9lb and 950" to make the RCS work for AMA pattern.


What we need is a ZDZ 35 at 2.5 lbs complete component weight.

Then you would have a power to weight ratio that would be suitable for pattern. Tie a quiet exhaust to it, and fly all day for $2.
That would be nice.