testbed
platform (physical or metaphorical) for conducting testing
Sea Hunter
unmanned surface vehicle
OPTIMISM
operational testbed of NASA's Perseverance rover for testing on Earth
development mule
vehicle equipped with experimental or prototype components for testing
iron bird
one kind of ground testbed for aviation systems testing
weather testing of polymers
controlled degradation of polymer and polymer coating degradation
testbed aircraft
aeroplane, helicopter or other kind of aircraft (specially designed or modified from serial production aircraft) intended for flight research or testing the aircraft concepts or on-board equipment
elevator test tower
structure designed to test elevators