Originally Posted by
A7Bldr
I haven't been able to see one in person so maybe it is the issue, but perhaps there are ways to creatively add inlet air.
Schubeler likes to add NACA ducts, etc.
Usually the exit size is too small, so that's what I'd like to see 1st.
This is the largest thrust tube you would get in there. Mine is about 22lbs without fuel.