I'm not sure that safety is a primary concern if you're just trying to see if you can make something fly _at all_. I'm sure they've started from zero several t

I'm not sure that safety is a primary concern if you're just trying to see if you can make something fly _at all_. I'm sure they've started from zero several times with entirely new designs. There's no point worrying overly much about safety if you only plan to fly something once.