Refer to the input text as context and select the correct relationship between 'Aerojet' and 'rocket engine' from the available options.
Options: location of formation, product/material produced, developer, manufacturer

NATIONAL HARBOR, Md., Sept 15 Aerojet Rocketdyne Holdings Inc on Tuesday said it expected to complete its new AR-1 rocket engine by 2019 to replace a soon-to-be banned Russian engine, but the date could slip if it does not receive enough U.S. government funding.
product/material produced