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.
Take context from the input text and decide on the accurate relationship between 'Aerojet' and 'rocket engine' from the options provided.
Options: location of formation, product/material produced, developer, manufacturer