Letters From Our Readers (July 27, 2020)

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Credit: H2FLY
THE HYDROGEN ECONOMY In the early 1970s, faced with the ending of the Apollo program, we at Rocketdyne (now Aerojet-Rocketdyne) considered other markets for our technology, such as application of hydrogen turbines as used on the J-2 rocket engine. In response to oil embargoes and eventual oil-field...

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