Bob Maddox once built the world’s largest pulse-jet engine and mounted it in a 1965 Jaguar. Star Wars audio engineers even recorded his pulse-jet engines for the movie Solo.

As the U.S. ramps up its efforts around hypersonic weapons, a number of defense and aerospace companies and their stocks are poised to reap the benefits, analysts say.

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The Rocket 3 Storm has a car-like engine underneath, but what else does it offer? Jack Evans finds out. What is it? There are ...