So I knew the Army had a drug problem in the seventies...
For your amusement (hysteria) (terror), here's a study on the feasibility of mounting two 105mm howitzers on a CH-47. I don't even know what you'd designate the resulting monstrosity. AH-47? MACH-47?
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=AD0750150
(I'd attach it but it's a 10 MB scan of the original document. And archived at a .mil address, so presumably not a prank...)
- C.