I am a 50 y.o. engineer who has learned to be skeptical of the mainstream information like evolution, heliocentric theory, moon landing.
So I have an open mind on the flat earth theory.
The three things you've cited are
not termed "mainstream" information. Collectively they're what we call science. And if you refute any of the three, then you're not a very competent engineer, or, as I suspect, not even an engineer. We have another whack-job on these forums who self-describes himself an "engineer" (username
Heiwa) as an obvious appeal to authority. He too makes ludicrous claims about space and space travel despite not having any qualifications as an astrophysicist.
You claim to have "an open mind" on the flat earth notion—BTW it's definitely not a "theory". A scientific theory "is a well-substantiated explanation of some aspect of the natural world that is acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation."
And, judging by the tone of your subsequent posts, it's more than obvious an open mind is something that you definitely don't possess. You even mock the astronauts by repeatedly calling them "astro-nots" and the Apollo vehicle as the "looney module". You also repeatedly question established technology as being improbable, and imply that NASA is a fraudulent organisation. This is more indicative of a closed mind.
Your abject ignorance of the Van Allen belts and their effects on lunar modules or astronauts warrants no response.