Tuned Hulls

Time will tell whether Obama brings a new Camelot or not. He has to win first.

His minor record in congress is 100% the most liberal member of the gang of 535.

In the endless battle between,

Freedom FOR government ,

or Freedom FROM government ,

its easy to contemplate HIS form of Camelot.

A GULAG , for the opposition , as usual.

FF

 

You want updates on Clinton, Obama? look up worldreports.org for some interesting news on current events. Cheers

 

DYNAMIC INERTIA Here is something that may interest old yachties.

Yachts tacking upwind lose way as they go about. There is a simple way of preventing this that I callDynamic Inertia.

The boat is fitted with auxilliary power with a fixed pitch propeller? Good. Now add a flywheel to the drive train that can be isolated by a clutch.

If a prop is pitched at 45 degrees and coupled to a flywheel through a clutch this can be engaged when sailing to store considerable energy in the flywheel. The engine is not neccessary for this to work. It takes a while for the boat to build up speed but then the propeller freewheels along with little drag.

Now what happens when you tack? The boat goes about slowly gut does not lose way, in fact it can travel a considerable distance upwind before needing to bear off to continue tacking. The inertia of the flywheel gives the effect of a much heavier boat.

This is an easy devive to make and it wil give a new lese of life to relatively slow or heavy yachts.

Think about it... Cheers, Lin

 

"It takes a while for the boat to build up speed but then the propeller freewheels along with little drag"

There is allways drag.

Im not certain but I think it dose not matter if the prop is spinning or not, the drag stays the same.

I would think the boat would move slower with a prop with a 45 deg reverse pitch spinning in the water and having to turn a flywheel. The slower boat would have its max forward sailing speed in any given wind reduced by some factor, as a result it would have to Tack more often in a headwind.

Im willing to be corrected here, and Im willing to admit Im worng. But Im allmost certain thier is no free lunch.

K9

 

Hello Kay9. Who mentioned reverse pitch? A coarse pitch allows a geared flywheel to spin in the same rotation as it would if driving the boat. A clutch isolates the auxiliary. The sailboat will gain speed slowly, but once underway its speed will be steadier because the flywheel absorbs power from gusts and returns it to maintain speed during lulls. There is no free lunch here, but there is a large increase of distance made good when tacking upwind. Love your Rotary Sail history! Thanks, Lin

 

You dont think the drag of a prop in the water spinning a flywheel would offset any extra momentum you would get in no wind?

 

Upload photos.

Hey Lin,
Email, me the photos and I'll upload them to the Gallery........send me a PM.
I have a number of computer and rebuild them all the time, if one goes down with a virus, I don't care.....

 

Lin I think you were trying to answer me here http://www.boatdesign.net/forums/showthread.php?p=184102#post184102

But crossed posted.

K9

 

Sorry Kay9, I find it difficult to reply to questions that you ask when you have no knowledge of mechanical engineering. Believe me, Rotary Sails can easily power the largest ship against consistent headwinds of ten knots. In stronger wind there is an enormous excess of energy that can be stored in flywheels, batteries or capacitors of some type.

As disclosed in my Provisional Patent, this idea can power icebergs to desert shores where they can become floating lakes of pure water. The beauty of this form of propulsion is that it requires no fuel resource.

Regards, Lin.

 

Hello Chaps.

My picture files are being progressively rifled when I try to send them. "This Folder is Empty" ... Weird, when I only use them to copy and paste... The address on the top right hand side of my post will find me if you would like a picture. Cheers, Lin

 

Wow Lin.

Your right my ability in Mechanical engineering is just about nil. But since you cant seem to explain how your prop/flywheel overcomes drag I have to assume you dont have much of a background in it either. Of course if what you said was true I guess we could turn all the gliders in the world into prop/flywheel airplanes. As long as they didnt have to fly downwind eh?

Guess Ill just have to stick my head back in my backwards world of science and technology as it was taught to me in my engineering courses at the US Merchant Marine Academy in New York.

K9

 

Alright you guys,, Play nice.....................
Ya know, I just drove over the Throggs Neck bridge, that "Empire State" boat is really Nice......

 

As an idea, maybe you could fax those prints to me (or someone else). If you fax to me at +1-323-297-1965, I will scan and post on this forum.