I have a 34 O'day with a 24hp universal diesel. It is turning a 16x12 two bladed prop. I would like to switch to a three bladed prop before starting a 2000 mile trip. Any advice as to size? I previously owned another 34 O'day which had the three bladed prop and was much happier with the performance. I just don't recall the size!
Thanks, I was aware of how to calculate the various parameters posted in these links. I was hoping for some empirical data, perhaps someone that has a three bladed prop on a 12000#, 34', roughly 25 hp vessel. Thanks again for your post.