Order arrived this morning from BnB Rockets.
WMD set. (Weapons of Micro Destruction).
6 military scale missiles, mini engine powered.
So I built one this afternoon: AGM114 Hellfire.
One down, five more to go.
Laters.
I don't believe that the 30:1 figure is related to the transition shape.
Just looking at it visually, the ratio of the two airframes being joined is nowhere near 30:1.
See posts 14 and 15.
I believe it relates to the exhaust gas expansion rate.