Our family did a Spring Break expedition to Washington DC, including a visit to the Smithsonian Air & Space museum. In the Air & Space museum was the Goddard l

Our family did a Spring Break expedition to Washington DC, including a visit to the Smithsonian Air & Space museum. In the Air & Space museum was the Goddard liquid fuel rocket. I was impressed by how crudely it was brazed (globs of brazing, not beautifully flowed)... but it flew, and proved the principle. http://en.wikipedia.org/wiki/Robert_H._Goddard#First_liquid-fueled_flight http://en.wikipedia.org/wiki/Robert_H._Goddard#First_liquid-...