propulsion--sail drive

I think I lost my first post.

Does anyone know of a manufacturer of a sail type drive for high horse power engines(300+hp)?? Lot of high quality outdrives but I cannot find a sail type drive. Thanks much, Stan

 

If you are saying you lost your posting, simply click on your name and select to 'view all the postings' you have made.

I written more than a few references to some belt and/or chain drive configurations. Here is one reference on my website:
http://runningtideyachts.com/power/

You might trying using the 'search' button up above, and type in "chain drive" and "belt drive". You will also run across a unit by PYI that they are no longer building. I am interested in building some of these belt and chain drives in SE Asia

 

Have you additional information about the "Hungarian Gentleman" and his consept.
Thanks! Teddy

 

Regrettably that situation never worked out, and I am unsure as to where the gentleman is. I believe his patent on the item has/or is running out.

I do intend to post all of the info I have on this hydraulic item soon, and as I take it down from my website to concentrate on the 'belt drive' & 'chain drive' potentials.... and the newer 'rim drive' technologies.

 

http://www.boatdesign.net/forums/showthread.php?t=21483 There it is with response..

And Brian..Thanks anyway..

 

Chain Drive...discontinued
http://www.yachtforums.com/forums/15453-post14.html

Pulling Prop Belt Drive
http://www.yachtforums.com/forums/7567-post9.html
About three years ago I had mentioned my interest in such a configuration to the Volvo rep at the Ft Lauderdale show. He said I should come visit them in Norfork. I never did take the time to follow up on that invitation. I suspect they have been working on this for some considerable time.

I had previously suggested this idea for both single and/or dual props, but utilizing a kevlar belt drive component rather than 90 degree shafts:
From my website,"Other than direct straight-shaft drive of propellers, most marine drives today involve some sort of 90 degree arrangement, ie.sail drives, stern outdrives, outboards, etc. The 90 degree gear set (and there are usually two sets) is the potential weak link in the system. All the power is being transferred over a very physical small contact area between two bevel gears. This contact patch can be nothing more than a thin line on the opposing two teeth! Special hardened gears and maintaining close-fit tolerances permit the horsepowers of today. But when it comes to diesel engines, the situation gets worst. The diesel is by its nature a much more torque'y beast. Gears to handle an even modest horsepower diesel are extra hard pressed. Teeth can break or get worn so quickly as to loose all tolerance."

Volvo is talking some fairly big diesel power here. I can only think that the smaller dia props (dual configuration) are a factor in making it work, but I still have trouble believing it. I wish them the best of luck in a successful product.


New Drive System, IPS from Volvo Penta
http://www.yachtforums.com/forums/technical-discussion/2232-new-drive-system-volvo-penta.html#post15453

Chain Drive Duo Prop
http://www.runningtideyachts.com/dynarig/Tennant_Hull_V_ChainDrive.php

How interested are you???

 

Hello People. Re: An Invention Titled " A Propulsion Unit."
Olen Holdings Pty, Ltd.,
Australia.
Date of filing:
15th March, 1974.
This invention is an Interface Machine called a Rotary Sail.
It treats air as an incompressible fluid at sbsonic velocities and can power large ships at speed directly upwind. The power recovery is in advance of the drag curve for ships. It can also propell icebergs to desert coastlines. Cheers, Lin.
Killed by BIG Business.
Number allocated: PB6924