The Ford Aerospace SIAM (Self-Initiated Anti-aircraft Missile) was developed in the 1970s at the request of the Defense Advanced Research Projects Agency (DARPA) for use as an airfield defense weapon. It could also theoretically be launched in a capsule from submarines as a defense measure against ASW patrol aircraft. Control of the program was handed to the US Navy in the 1980s, and the missile was apparently tested and proven to work, but development was ended due to lack of funding and it was never fielded operationally. I only have a vague idea of what the dimensions of this missile might be, so I modeled it up in what I would assume to be 1:48 scale or perhaps 1:32 scale. Anyway it's as small as I think I can make it while still having it printable on an FDM printer, a resin printer would obviously be preferable for smaller scales.