> Drag of this unit, quite apart from the lack of an aeroshell, > would be badly affected by its large area to length ratio. > Drag is far far more significant for small rockets due to the > square-cube law (area to volume ratio goes down as size goes > up so, to a first approximation, drag effect decreases with > size). HUH? I missed that one in Physics (not that I had a lot of physics, it's a weak point along with analog electronics) so could someone clue me in? How in the heck does drag decrease as the size of the object increases? Did you mean to say that it decreases as the ratio of length to width increases? I could buy that one... Are you saying that the ratio of drag to mass decreases as the size / mass increases? --- James. (obviously not even CLOSE to being a rocket scientist) -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist