<p dir="ltr">On Feb 11, 2015 1:48 AM, "spike" <<a href="mailto:spike66@att.net">spike66@att.net</a>> wrote:<br>
> Like everything in control theory, it seems like systems do the opposite of what you would think. Nozzle forward seems stable to me: center of thrust way forward of the center of mass and center of pressure. That looks to me like it would fly straight, but it doesn’t. Nearly everyone here as seen and played with toy rockets. For some odd reason those things do fly straight, with the center of thrust well aft of the center of gravity.</p>
<p dir="ltr">Having seen the video of the weather balloon launched iPhone, I am curious if there is any application for balloons to reach upper atmosphere. </p>
<p dir="ltr">Given some of the new aerogel materials there might be new designs possible - you know, every few decades reexamine old ideas that weren't possible to see if they can work now. :)<br>
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