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Speed Boat Building thoughts outside of the box

Old 09-05-2018, 12:13 PM
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Default Speed Boat Building thoughts outside of the box

Milehogs Defective Boat thread got me to thinking outside the box about speed boat building possibilities.

Have no idea if this idea would even work but here it goes.

”If”, a person were to install full length canister chambers within a hull and filled them with helium, would this in real
world application actually lighten the boat and remove more of the hull out of the water at high operating speeds?
Old 09-05-2018, 12:19 PM
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See my post to shed some light.

We have not done one of these in a while
Old 09-05-2018, 01:00 PM
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It takes 14.48 cu ft of helium to lift a pound.
or about 30000 cu ft to lift a 2000 lb boat.
Old 09-05-2018, 01:01 PM
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I've always wondered how they keep those helium cylinders from floating off...
Old 09-05-2018, 01:24 PM
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I put helium in my pontoons and fly around town with a solar powered box fan
Old 09-05-2018, 02:22 PM
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With enough helium -- or better yet, hydrogen -- you can lift the entire hull out of the water and become a dirigible.
Old 09-05-2018, 03:51 PM
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Originally Posted by Drako View Post
With enough helium -- or better yet, hydrogen -- you can lift the entire hull out of the water and become a dirigible.
oh, the humanity!!!
Old 09-06-2018, 04:45 AM
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Originally Posted by williamwallus View Post
I put helium in my pontoons and fly around town with a solar powered box fan
At least that makes a little more sense, because you wouldn’t add weight of a tank to hold the helium! Still very minimal. I am pretty sure I asked this question about putting helium in a pontoon many years ago!


Yep! Your thoughts on a crazy idea with helium in pontoons...
Old 09-06-2018, 07:01 AM
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Back in the box. Get...back...in...the...box!
Old 09-06-2018, 12:52 PM
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We have not done one of these in a while

^^^ At least I'm not the only crazy one around here.
Old 09-06-2018, 03:30 PM
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Just fill all the fenders up, but don't forget to wash them up first. Don't forget your float tubes either.
Old 09-06-2018, 03:34 PM
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If we are doing crazy boat-related ideas I have a few.

How come boats don't have suspensions? I'd like to see a dual hull with suspension between the two. An exterior skin attached to the standard hull. Or the liner is separate from the hull and suspended along the cap by suspension components.
How about a truly variable hull design? Super deep V while moving that then squats out at rest for stability. Or deployable bags or boxes at the water line.
How about a variable pitch prop? One size/angle/cup for accelerating and another for cruising.

I know, sounds very simple and inexpensive.
Old 09-06-2018, 03:43 PM
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Old 09-06-2018, 06:28 PM
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Originally Posted by Locke N Load View Post
If we are doing crazy boat-related ideas I have a few.

How come boats don't have suspensions? I'd like to see a dual hull with suspension between the two. An exterior skin attached to the standard hull. Or the liner is separate from the hull and suspended along the cap by suspension components.
How about a truly variable hull design? Super deep V while moving that then squats out at rest for stability. Or deployable bags or boxes at the water line.
How about a variable pitch prop? One size/angle/cup for accelerating and another for cruising.

I know, sounds very simple and inexpensive.
There have been a few active suspension type products out there. Boston Whaler had one for a while. My guess is not worth the money or at least nobody wanted to pay for it.
There was a recent article in Professional Boatbuilder about a variable hull - unfortunately, it's a blow boat so probably not of interest to most on THT. As an aside (and I wouldn't wish this on anyone), Tunnles has been on about this for a while. Maybe you could contract him for it.
Variable pitch props are a thing.
Old 09-06-2018, 07:55 PM
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Originally Posted by OReely View Post
There have been a few active suspension type products out there. Boston Whaler had one for a while. My guess is not worth the money or at least nobody wanted to pay for it.
There was a recent article in Professional Boatbuilder about a variable hull - unfortunately, it's a blow boat so probably not of interest to most on THT. As an aside (and I wouldn't wish this on anyone), Tunnles has been on about this for a while. Maybe you could contract him for it.
Variable pitch props are a thing.
Story of my life! All my good ideas are already taken. I was thinking about a hydrophobic coating for hulls, but the military already came out with that. Maybe air like on an air hockey table.
Old 09-06-2018, 08:14 PM
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LNL, you be a day late & a dollar short again.....................


More my speed.

Old 09-07-2018, 07:58 AM
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Originally Posted by Riptied View Post
LNL, you be a day late & a dollar short again.....................
Why you all have to be such wet blankets and ruin my day?
Old 09-07-2018, 08:34 AM
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What I'd like to see in a smaller hull is a REALLY deep V at the bow, where the bottom of the V is about a FOOT or two lower than the hull at the stern. Wonder how well that would cut through chop. At speed, the lower end of the V is still in the water, so there might be more drag than a typical planing boat where the bow it totally out of the water. You might be able to dimple that section so the boundary layer is disturbed to reduce drag.
Old 09-07-2018, 09:08 AM
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fill the hull with ping pong balls ,that will make it lighter and float higher, paint it red and add some wings, it should fly with all that weight gone.
Old 09-07-2018, 09:23 AM
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Why invent bizzare ways to lift the hull out of the water when it can easily be done with foils?

Even human-powered boats can do this:


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