Page 1 of 2
RB12, 12/3/2015, jwassdo
Posted: Sat Dec 05, 2015 7:40 am
by jwassdo
Re: RB12, 12/3/2015, jwassdo
Posted: Sat Dec 05, 2015 8:17 am
by Cracker Larry
That looks awesome, Jeff
Nice job!
Re: RB12, 12/3/2015, jwassdo
Posted: Sat Dec 05, 2015 8:57 am
by topwater
Very nice
Re: RB12, 12/3/2015, jwassdo
Posted: Sat Dec 05, 2015 10:33 am
by jacquesmm
Congratulations on the launch.
How about some performance figures once you finish the fine tuning?
PS: the tumblehome looks very smooth.
Re: RB12, 12/3/2015, jwassdo
Posted: Sat Dec 05, 2015 11:23 am
by jwassdo
I'm not exactly high tech when it comes to that stuff, but by my cell phone, with two people, the boat did about 28 miles per hour. I know I topped 30 by myself. I found a 109lb 30 horse with electric start and remote controls. I see that the extra five horse were unnecessary, but the extra weight doesn't seem to have made too much of a difference. I'm going out again today to play around some more. There was some porpoising with my buddy and I, that's over 400lbs of human ballast. I installed a hydroplane and we'll see if that helps. It takes turns flat, actually skids a little, sort of like getting sideways in a 911. Very flat, feels very safe. You don't realize just how small a boat like this is until you go out on the water. Also, I recommend avoiding wakes in it!
Re: RB12, 12/3/2015, jwassdo
Posted: Sat Dec 05, 2015 2:16 pm
by Walkers Run
That's very cool! I love the windshield. Congratulations
Re: RB12, 12/3/2015, jwassdo
Posted: Sat Dec 05, 2015 4:16 pm
by gonandkarl
Hi,
Congratualtions on splashing a beautiful boat and I wish I had your skill level because I know I wont get my boat as nice looking as yours. But as I am building a sailing boat the only aim is to get it to sail without sinking which my family members always fear.
That it will not sink I am not putting any holes into the hull like sonar thru hull fittings and to make the finish anywhere near your standards the boat will be painted white without gloss to hide any imperfections.
Enjoy your lovely boat.
Greetings from Karl ( Austria )
Re: RB12, 12/3/2015, jwassdo
Posted: Sat Dec 05, 2015 4:20 pm
by jacquesmm
28 mph is very fast for a 12' boat!!!
The smaller the boat, the more sensitive it is going to be to weight distribution and porpoising. The cavitation plate fins will help.
Re: RB12, 12/3/2015, jwassdo
Posted: Sat Dec 05, 2015 5:15 pm
by jwassdo
Jacques, I agree. I don't think I need to go any faster than 25 to 30, on a calm water with no other boats around. I took it out today and with the hydroplane fins it was like riding on rails. Tremendous improvement. The boat is amazingly stable at speed. I think this is a good time to thank you for all your support, and also to thank all of the other members of this community. I referred to many older posts throughout the process. I really could not have done this by myself.
Karl, up close it is obvious this is a home built boat. I am betting you can far exceed my level of finishing. You'd be surprised what you can do. My advice is to take the extra time in the fairing stages because once you put paint on it you sort of lock in whatever imperfections you have created. I'm sure yours will float no problem, trust the process. It will be great.
Re: RB12, 12/3/2015, jwassdo
Posted: Mon Dec 21, 2015 4:33 pm
by jwassdo
When out on the Intracoastal yesterday in Sarasota in a small to moderate chop. With about 310 pounds of human ballast the boat did about 28 miles per hour wide open throttle. There's a big difference with flatter water. I don't have rpm data, I'm not sure what other information I could provide. The grin factor is awfully high though. I probably built it too heavy, but I think with a 15 horsepower motor that boat would have a hard time getting on a plane. I think that pretty much rules out a 4 stroke on the 12 footer. But a two stroke 25 is probably about right.