I took A89 Colchide out of the water for winter a few days ago, accompanied by East Coast Rep- Nick Phillips and Martin Bennett. They were surprised how small A89’s prop is. Martin actually called it an “egg whisk”. It will only propel A89 at about 3.5 kts.
It seems it was bought by Uncle Bernard in Switzerland as a 14 x 12, but when it was offered up to A89, it was felt that there was insufficient clearance to the hull, so one inch was cut off each blade. The picture shows the original 2 bladed folding prop behind Martin’s spare 3 bladed 12 x 7 prop, which also has the markings 1284 & 2147. We are going to try Martin’s spare prop next year.
I then spoke to our Commodore, Colin and he has a 11.5 x 11 3 bladed prop with markings 1284 & 2962, and this will propel Hiran at 7 kts. There is a very interesting website vicprop.com, where you can input various figures and find out the ideal engine HP and prop size for an Atalanta. I am interested to hear from any other owners of: Engine HP, Prop size and no of blades, max speed in still water. Many thanks.