Interesting conversation. Dr Farrell confirms his belief that chemical rockets are a physics clown show which begs the question. Why so many clown shows? I don't know but I don't think NASA is credible and this is probably the best compliment I can pay to the FE crowd. It was they who destroyed that mythology, though they're just as attached to their own.
That's silly until the average human can take a closer look... from a distance.