Posts: 1756
Location: Mt. Zion, IL | VMS - 4/16/2010 5:22 PM
As for gaining 4 mph on an aluminum hull such as mentioned...I'm curious...what pitch prop, what RPMs were you running, what is the max rpm for the motor and what is the gear ratio of the lower unit? Oh...and what were the RPM's before you waxed the hull? I'd also be interested in the numbers for the 6 mph gain too..
Steve
The aluminum boat is an alumacraft t-14s with a 15 hp 2 stroke Johnson. Max speed reached just after waxing = 26.1 mph (for about a half mile on a day with calm winds). Max speed before waxing was 22.5 mph. Not quite 4 but close enough to warrant waxing IMO. Prop is a 9.5 x 11 I believe. No tach so I don't know max rpms.
The crownline had not been waxed since purchased (boat is an 89). Has a 23" pitch prop (alum) and I am unaware of the diameter. The entire hull was waxed as it was fairly dirty. 454 with a monster cam. It freed up a lot of resistance. I am not familiar with the max rpms of the boat as it is my fathers. |
