What water knows... I think you all are missing something which can be clearly seen from a proper free body diagram (let's hope I can draw one). Wt-W&Y (wt of water & you & yer stuff) | | | | | | | | V ------------------------------------------------- ^ ^ ^ | | | |<- - - - - - - >| | | dx | | | S_L | S_R (sponson, right) | | | | B_E (bouancy from ends) These forces are all algebraic functions varing in both magnitude and direction realitive to the angle of tip (ex tip gives slosh & shifts center of mass). But, the basic geometry tells us a few things. The difference between interior and exterior sponsons is the distance dx, where the turning moment from force S_L=(in the simplest case) F*dx. The hull stability forces from the hull design are largely made null by the evacution of air from the hull, hence the lack of stability, but now that we are adding more air and particulary adding it in a manner in which the dist dx is set (superior to what a seasock does), we are increasing these previously insignificant forces of stability provided by the hull. Catch 22 is: we know the significant quantity of air in the ends isn't doing much for us, stability wise, so we are going to have to very significantly replace water with air. The design as initially described did not seem to be doing this, so I don't disagree with other posters in the sense that the forces I'm discussing here wouldn't provide much change in stability, in that particular design. But, with a more significant interior sponson it would provide the flooded state stability we are looking for. I think in the future we will see this design incorporated in many boats. With the completion of this post I do hereby declare myself the sovereign pope of the church of the interior sponson. You may not here from me for a while because I'm feeling an almost unquenchable desire to post on rec.boats.paddle. gotta go -- Mike McNally mmcnally3_at_prodigy.net You are capable of planning your future. *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Sun Dec 23 2001 - 17:43:30 PST
This archive was generated by hypermail 2.4.0 : Thu Aug 21 2025 - 16:30:46 PDT