Bulbous bows
-
- Active Poster
- Posts: 384
- Joined: Sat Jun 20, 2009 2:16 pm
Re: Bulbous bows
Congrats , and go easy on the paint
- Jaysen
- * Bateau Builder *
- Posts: 6520
- Joined: Wed Aug 05, 2015 7:59 am
- Location: St Helena Island, SC
- Contact:
Re: Bulbous bows
Nice! That looks like a lot of hard work executed with the precision you’ve repeatedly demonstrated. She’s going to be perfect down in the gulf.
Be careful with spray rails. Can’t remember who put them on an hull and changed the running trim on the boat. As much work as you’ve put in I’d hate to see it go sideways.
Be careful with spray rails. Can’t remember who put them on an hull and changed the running trim on the boat. As much work as you’ve put in I’d hate to see it go sideways.
-
- * Bateau Builder - Expert *
- Posts: 10205
- Joined: Tue Jan 12, 2010 12:25 am
Re: Bulbous bows
They are making an awful lot of spray at 3500rpm; did not go higher as guests onboard. The BBs need to be made sharper and the spray rails mounted well above dwl. The spray rails would probably just help of there is a partial range of rpms that make spray.
I need to get the boat on plane.
I need to get the boat on plane.
- OrangeQuest
- Very Active Poster
- Posts: 3948
- Joined: Tue Aug 28, 2018 1:14 pm
- Location: Houston, Texas
Re: Bulbous bows
Looks like the bulbous bows were designed to go through the water and not so much helping push the bow upward. So the water goes up the top of the BB then hits the original bow at a strange angle and causing the spray. And the BB are keeping the bow from rising as speed increases. And that is just judging from the single picture and the shape of the BB to the bow. They seem to add buoyancy to the bow but no lift with speed. Very sorry if I am wrong.
"that it isn't just an ordinary sort of boat. Sometimes it's a Boat, and sometimes it's more of an Accident. It all depends." "Depends on what?" "On whether I'm on the top of it or underneath it."
A. A. Milne
A. A. Milne
-
- Active Poster
- Posts: 384
- Joined: Sat Jun 20, 2009 2:16 pm
Re: Bulbous bows
I think you have your major issue fixed by the look of the water line , you will work out the spray problem or learn to live with it , sort of like a slicker suit on a small cape horn . Once you get to CC you may be able to switch out some solar for wind , and depending on wind direction you may or may not have a spray problem .
-
- * Bateau Builder - Expert *
- Posts: 10205
- Joined: Tue Jan 12, 2010 12:25 am
Re: Bulbous bows
Well, we never got up past 3500; so testing is needed.OrangeQuest wrote: ↑Fri Jul 07, 2023 10:50 am Looks like the bulbous bows were designed to go through the water and not so much helping push the bow upward. So the water goes up the top of the BB then hits the original bow at a strange angle and causing the spray. And the BB are keeping the bow from rising as speed increases. And that is just judging from the single picture and the shape of the BB to the bow. They seem to add buoyancy to the bow but no lift with speed. Very sorry if I am wrong.
- cape man
- * Bateau Builder - Expert *
- Posts: 8283
- Joined: Sun Jan 20, 2008 12:02 pm
- Location: Lithia, Florida
Re: Bulbous bows
Congrats man! Ambitious, aggressive, creative, daunting fix! Me, I would fair them up nicely, including sharpening the edges and get her up on a wide open plane before deciding on spray rails and location. Squatting a little to stern is a LOT better than squatting to the bow! Again, congrats! Take a bow (pun intended).
The world always seems brighter when you've just made something that wasn't there before - Neil Gaiman
-
- * Bateau Builder - Expert *
- Posts: 10205
- Joined: Tue Jan 12, 2010 12:25 am
Re: Bulbous bows
Yupcape man wrote: ↑Fri Jul 07, 2023 10:25 pm Congrats man! Ambitious, aggressive, creative, daunting fix! Me, I would fair them up nicely, including sharpening the edges and get her up on a wide open plane before deciding on spray rails and location. Squatting a little to stern is a LOT better than squatting to the bow! Again, congrats! Take a bow (pun intended).
- BarraMan
- * Bateau Builder - Expert *
- Posts: 2165
- Joined: Tue Dec 11, 2012 3:44 pm
- Location: Australia
Re: Bulbous bows
I had the same thought - boot it onto the plane and see what it does!cape man wrote: ↑Fri Jul 07, 2023 10:25 pm Congrats man! Ambitious, aggressive, creative, daunting fix! Me, I would fair them up nicely, including sharpening the edges and get her up on a wide open plane before deciding on spray rails and location. Squatting a little to stern is a LOT better than squatting to the bow! Again, congrats! Take a bow (pun intended).
PS: I finally 'got' it - congratulations on some interesting work!
-
- * Bateau Builder - Expert *
- Posts: 10205
- Joined: Tue Jan 12, 2010 12:25 am
Re: Bulbous bows
Had 88 year old onboard on Wednesday. As a Captain, I put the passengers safety and happiness above testing.BarraMan wrote: ↑Sat Jul 08, 2023 1:21 amI had the same thought - boot it onto the plane and see what it does!cape man wrote: ↑Fri Jul 07, 2023 10:25 pm Congrats man! Ambitious, aggressive, creative, daunting fix! Me, I would fair them up nicely, including sharpening the edges and get her up on a wide open plane before deciding on spray rails and location. Squatting a little to stern is a LOT better than squatting to the bow! Again, congrats! Take a bow (pun intended).
PS: I finally 'got' it - congratulations on some interesting work!
Who is online
Users browsing this forum: No registered users and 0 guests