I share with you some pictures showing a flying P-61 with a missile under the fuselage. Does anyone know what kind of missile is this and was used operationally? The link also contains photographs of the plane now testing some kind of jet engine. Photos can be viewed by visiting the link below: http://aviacaoemfloripa.blogspot.com.br/2011/02/p-61-black-widow-em-testes-especiais.html Lawrence
I'm pretty sure the missile in the third and last pic is a Gordon IV. It was an air-to-air system used in the late 40s and early 50s.
That's not a missile. That's probably a dumbbomb. When aircraft were tested, they put those on to determine drag.