My grandson has been working on a Senior Project - He is very good in Math and calculated all the things necessary not only to make this boat float, but also to carry a pretty hefty load. Fortunately he lives down in Bellows Falls, as I don't think he would have wanted to launch it up here in these swift waters yesterday. This is a facebook link, so don't know if everybody can link to it.
His Mom, Lynn Raymond-Empey took the video of the launching:
http://www.facebook.com/home.php#!/video/video.php?v=1704201128891 (http://www.facebook.com/home.php#!/video/video.php?v=1704201128891)