Made a 1/15 scale model for my ultralight helicopter project, that I am working in my free time.
Very nice model! Love the fuselage shape and the V-tail.
It is pretty hard to squeeze everything in lowest drag fuselage and the v-tail is from LHX program.
It's a great idea, but the picture you have provided is not from the LHX program, it is actually the Eurocopter HSH.
I agree with the similarity. Very little info is available on the internet for Eurocopter's HSH, but I suspect it may have something to do with the later X3 and X4 programs (both high-speed helicopter efforts, as the former abbreviation seems to suggest).