someone else sorta using my saw bow concept

[Squidly-Diddly]

"future of boats" Sunbeam 32.1 stealing my Saw Bow concept (sort of) https://www.boatdesign.net/threads/future-of-boats-sunbeam-32-1-stealing-my-saw-bow-concept-sort-of.67921/

My sketch in this thread.
Wave-peircing & Axe bows, how about Saw bows? https://www.boatdesign.net/threads/wave-peircing-axe-bows-how-about-saw-bows.64394/

 

[Herreshock]

I designed a similar boat the other day doing some improvised free expression design

The problem i found with sunbeam now is that these boats (along aeolos p30, clubswan 36, etc) should use nets in the bow just like multihulls do, so people can walk fine to the bow sprit and also deck weight can be reduced by doing this

Sunbeam is a good small spacious concept like brava 25, ikone 6.5, sarch 8, etc

Sunbeam bow should be round like 2024 jeanneau sun fast od to float over waves rather than dig

 

[fallguy]

I still don’t get it; need 3 view drawing.

And I’m truly curious. I modified these bow extensions in 2024 to have positive rake. They are slighttly different side to side. Up around WOT, I am getting some spray. I have no idea how they will function under heavy seas/large pitching. We just don’t have such seastates in Minnesota, but the boat is heading to the Gulf of Mexico in 2025, fall.

I have rope knives I plan to add that would cut most anything that makes its way over the tip.

 

[Herreshock]

Good luck colliding with ufo debris, container or a cetacean....

Usually multihulls are built with thin bows to avoid fluttering and breakage during storms but also they are a recipe for wave capsize pitchpole disaster

 

[Squidly-Diddly]

I still don’t get it; need 3 view drawing.



I have rope knives I plan to add that would cut most anything that makes its way over the tip.

what is a "rope knife" in this context and which way would you run them? Is it a rope to cut green water?

 

[fallguy]

A rope knife is a sharp metal edge at the intersection of the bow and bow extension. If a rope gets atop the extension; it gets sliced.

 

[fallguy]

Good luck colliding with ufo debris, container or a cetacean....

Usually multihulls are built with thin bows to avoid fluttering and breakage during storms but also they are a recipe for wave capsize pitchpole disaster

Well, the extensions actually lift the hulls up, so less likely to hit underwater sea monsters. But I am trying to understand ‘saw’ bows.

 

[Squidly-Diddly]

Well, the extensions actually lift the hulls up, so less likely to hit underwater sea monsters. But I am trying to understand ‘saw’ bows.

idea is to get some of the benefits of wave piercing, spray defection at same time.

The youtube of the Cat at speed in rough water shows what a One Factor saw bow would do. Its wave piercing but has spray defectors. What would happen if that same pattern was tripled in smaller steps? I'm thinking the underwater part would do just fine, and the surface breaking part would be smaller, with less spray all through a taller changing wave height.

 

[fallguy]

How do you figure those are not just bow extensions? Made to extend waterline, provide some lift, forward buoyancy, and the splash knuckles?

a polite question

 

[Squidly-Diddly]

How do you figure those are not just bow extensions? Made to extend waterline, provide some lift, forward buoyancy, and the splash knuckles?

a polite question

View attachment 200199

is that question for me? Yes, they are bow extensions and the idea is you'd get most of the benefit of wave piercing and above-extension spray defection consistently over the whole height of the wave, and smaller extension generated overwash, and smaller bow spray.

If you've only got one big extension and one big bow overhang above it, when wave is peaking your bow will just be a normal bow blowing lots of spray.

No, I'm not really sure if it would work like that.