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Discussion Starter #1 (Edited)
I don't think I've mentioned it before here, but I love to invent things. I'm working on something new that I think no one has done before. I must make sure to NOT go into any details on a public forum, so let me provide some information which reveals nothing of the design or anything.
  • This would be an emergency rudder that can go easily from one boat to another.
  • It would not need to be permanently mounted.
  • It would not need permanently-attached mounting brackets.
  • It would be bought for less than $400, stored onboard, and easily used when needed.
  • It would be very compact for storage.
  • It would have sufficient force to overcome the effect of your normal rudder, if that was stuck to one side.
Would there be a strong need for this product?

Regards
 

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  • ...
  • It would have sufficient force to overcome the effect of your normal rudder, if that was stuck to one side.
Hm. Could it "overcome" the drag involved in such a scenario. My guess is that your design will involve the use of eccentric drag to create a turning moment on the boat. Drag from stuck rudder + drag from Bene505Rudder + decreased inboard prop performance due to stuck rudder = too much drag methinks.

My suggestion is, before you get too concerned about your potential market, build a prototype (your wording hints that you have not yet done so), lash your tiller, and see how your boat performs with your emergency rudder. Then come back and say, "Adam, you were way off base. The boat goes even faster than before," so that I can stand corrected.

At that point I don't think you'll have too much of a problem with marketing.
 

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Seinor Member
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Show me the rudder

and if it does everything you say I'll show you da money.

How about that. Sounds to good to be true

Fair Winds

Dave
 

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Glad I found Sailnet
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Discussion Starter #5
Hm. Could it "overcome" the drag involved in such a scenario. My guess is that your design will involve the use of eccentric drag to create a turning moment on the boat. Drag from stuck rudder + drag from Bene505Rudder + decreased inboard prop performance due to stuck rudder = too much drag methinks.

My suggestion is, before you get too concerned about your potential market, build a prototype (your wording hints that you have not yet done so), lash your tiller, and see how your boat performs with your emergency rudder. Then come back and say, "Adam, you were way off base. The boat goes even faster than before," so that I can stand corrected.

At that point I don't think you'll have too much of a problem with marketing.
Adam,

It would go slower, since there'd be two rudders, each acting in opposite directions, but it would still make headway and make the boat steerable.
Does anyone know if rudders get stuck fully deflected usually? (I'm thinking sliding down the face of a wave or hitting something. There must be more examples. Come to think of it, I ought to call the guy who drifted for 40 days southeast of Bermuda.)
 

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Glad I found Sailnet
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Discussion Starter #6
and if it does everything you say I'll show you da money.

How about that. Sounds to good to be true

Fair Winds

Dave
That's good advice. Thanks.

Smack -- you too. Thanks for the advice. I will have one to test with you when you visit in June.

Any other feedback?
 

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... a logical conclusion
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An emergency rudder is one of the options offered on the Hunter 49. I have one, and it is a big, beefy stainless steel structure that attaches to three eye pads mounted on the transom, and is controlled with a stainless steel tiller. I have it stowed on cradles in one of the transom lockers. Its cost when I ordered it in June 2006 was CA$1,100.
 

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It would go slower, since there'd be two rudders, each acting in opposite directions, but it would still make headway and make the boat steerable.
I hope so. All I'm saying is, this remains to be seen.

Does anyone know if rudders get stuck fully deflected usually?
Unless something actually wedges itself between the rudder and the rest of the boat, I think it would be unusual to get stuck in such a position. More likely the stock would bend and stick the helm in a position closer to neutral.
 

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It sounds like a reasonable idea. As you know, the total market for sailboats is sadly quite small, so you should not expect gigantic volume or economies of scale. Would it be designed for a particular range of boat sizes?
 

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Discussion Starter #11 (Edited)
It sounds like a reasonable idea. As you know, the total market for sailboats is sadly quite small, so you should not expect gigantic volume or economies of scale. Would it be designed for a particular range of boat sizes?
A bigger boat with a fully deflected stuck rudder would require a certain size. It's probably better to offer a smaller one to people with smaller boats. Although the bigger one will certainly work. If the testing or customer feedback says to have more sizes, that's what there will be.
 

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Since my rudder assembly is currently a concern for me and is a project for this summer.

Put me down for one.
 

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I carry a paddle and lashing to put it on the stern pulpit but this does NOT scale up to a bigger boat to well
 

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Glad I found Sailnet
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Discussion Starter #15

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Glad I found Sailnet
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Discussion Starter #17
Dude are we going to get to test this thing on our upcoming BFS?
Of course!

Speaking of which, we have to remind people to block off June 19th for the Smack-the-daddy dinner on Long Island. (And we need to pick a place. The place last time was good.)
 

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Glad I found Sailnet
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Discussion Starter #18
Quick update...

I mentioned somewhere that I did a patent search on all US patents with the words "rudder" and "sailboat" in the abstract of the patent. I've now made it part way through the patent search with the words "rudder" and "boat" in the abstract of the patent. So far so good. I may have a unique device here. I will have the rest of the US "rudder" and "boat" searches done in the next 6 days. After that I need to start thinking about other countries -- probably need to talk with my patent attorney.

I will build a very scaled-down model and complete some initial testing before Monday. I'll keep you posted.
 

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Good work... sounds like you're taking the right path to making this work. Best of luck with the project.
 

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Sorry to pull back an old topic, but I've been thinking about needing something like this. How did it come out?
 
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