Kites....? http://www.skysails.info/fileadmin/user_upload/Pressedownload/Dokumente/Brochure_Humphreys.pdf Cheers.
I wrongly posted the message down here at other thread in these Forums...
On May the 25th it will take place at NAVALIA (http://www.navalia.com.es/index_eng.htm), an international shipbuilding and maritime industry...
I have tested twice the JetPac, in different boats (A rib and a workboat), and I've found Swordmarine statements are quite correct. Acceleration...