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A key advance was the invention of the first liquid-fuelled rocket in 1926 by the American Robert Goddard in Auburn, Massachusetts. Goddard is considered to be one of the fathers of the modern rocket era.
Robert Goddard, an American scientist, invented and launched the first liquid-fueled rocket in 1926. It only made a short flight, and obtained a speed of about 60 miles per ho â¦ ur. Within a few years Goddard would be launching rockets reaching speeds over 500 miles per hour and traveling over 2000 feet.