It was actually conceived as a means of "flash acceleration" in response to the Me262 threat.
There were two test aircraft, both were P-51D-25 airframes (44-73099 44-74050) and the rocket was an acid-aniline rocket motor that was fed by Red fuming nitric acid, carried in a special tank under the port wing and an aniline-alcohol mixture, carried in a tank under the starboard wing.
The fuel mixture was extremely volitile and could prove to be dangerous in a ground error and/or combat, plus the tests did not produce satisfactory results, so it never developed any further.
that was kind of what i was thinking. to give them a chance to get a 262 in range long enough to take a couple shots at....OR they were looking at taking off of very short strip or carrier fully loaded. thanks GG
The concept was a direct result of the German's jet and rocket aircraft threat and it would never work on a carrier, as the rocket's exhaust would destroy the carrier's deck...
I imagine the exhaust would have been pretty rough on an asphalt runway, too