Two Liberty Ships which survived WWII were later used as heavily-modified test hulls by the US Navy, the stranger of the two being YAG-37 which was powered by aircraft propellers.

libship

(A WWII Liberty Ship.)

yag37

(YAG-37, the former WWII Liberty Ship S.S. John L. Sullivan, during the turboprop experiments.) (US National Archives photo)

THE YAG-37 PROJECT

In its new guise YAG-37 had a “crew” of 20, all of which were in some way connected to the project and not expected to live aboard the ship.

yag37b

(clipping from Popular Mechanics magazine)

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YAG-37, the former WWII Liberty Ship S.S. John L. Sullivan, during the turboprop experiments.