Are any of them a question you actual have? Then go ahead an ask it.
But "recycling example questions" isn't exactly the goal of a private beta. You're not supposed to be asking questions simply for the sake of filling the site with stuff. Please at least read:
Your New Site: Asking the First Questions
The biggest challenge facing this particular site will be gaining some semblance of expertise. I live on the Space Coast of Florida, and these don't sound like the day-to-day problems folks in the aerospace industry would ask.
The problem is, if this site takes on the tone of a middle school science club, we're not building a site for experts. It's really too early to judge, but this site has the early earmarks of our failed Artificial Intelligence site, with a conspicuous lack of expert-level questions (and answers) posted mostly by the merely curious. I hope we can overcome that hurdle because I like this subject, but I don't find the questions (or answers) all that intriguing or insightful.