is carbon fiber a good fabric for ultralight aircraft and or boats .
Yes.
But a better one is a compound of carbon fibre sandwiched between two sheets of 1.9mm aluminium sheets
what about transparent aluminum?
Best person to answer that question is Vulcan.
You mean Aluminum oxynitride, not really, but it is being used for window armour in some NATO vehicles. The link is on CR4 somewhere (I wrote it but cannot find it now). Until then have a look at the following links.
http://en.wikipedia.org/wiki/Transparent_aluminum
And this one which is a bit old.
http://www.livescience.com/technology/051018_new_glass.html
Or a good old google search.
This better than transparent aluminum http://geekheretic.com/?p=185, http://www.af.mil/news/story.asp?id=123012131, aluminum oxynitride --
Check it out!
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