Abstract: Disclosed is A load cell assembly for transferring a load to a transducer, the load cell assembly comprising a contact plate adapted to contact an object generating the load; a transducer adapted to generate an electrical signal proportionate to the load; and a ball component adapted to transfer the load from the contact plate to the transducer; wherein the contact plate, ball component, and transducer are arranged so that the contact plate and transducer are simultaneously in contact with the ball component.

Abstract: Disclosed is an apparatus for testing a water rocket and a method for use thereof, comprising a load cell assembly, a launcher assembly, a rocket assembly, and a base piston, all situated within a housing. Air and/or water pressurizes the rocket assembly and the launcher assembly, which is released to cause the rocket to exert a propelling force on the rocket. The load cell is adapted to capture and record the thrust of the water rocket. The housing is adapted to retain the released water within the housing. The base piston is adapted to move the launcher assembly out of the way of the releasing water and air, whereby the launcher assembly does not impede the exit of the water or air that could result in inaccurate data.