P-61 Black Widow with missile

[pampa14]

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

Best Regards.

[leccy]

A P-61B (42-39754) was used by NACA’s Lewis Flight Propulsion Laboratory in Cleveland, Ohio for tests of airfoil-type ramjets in 1947.

The ‘missile’ is a aerodynamic test piece

http://napoleon130.tripod.com/p61blackwidow/id49.html