[brian eiland]

Originally Posted by Dan Evans

I hope I am not getting too sidetracked here, but has anyone looked at putting these in a waterjet? I know that installing a waterjet with a rim drive means that the rim drive is now inside the hull so if it leaks its going to be a bad day... The drive is already in a tunnel so I dont see why it wouldnt be easy to adapt to a jet. I think it is a great idea not having a shaft turning in the water but I dont think it is a good idea to have the rim drive mounted under the hull. It is an expensive and probably sensitive piece of equipment.

Dan

You might have a look thru some of these jet pump discussions, and note in particular I suggested such a 'rim drive impeller'

http://www.yachtforums.com/forums/te...vs-prop-3.html

[Dan Evans]

Sorry Brian, I wasn't trying to steal your thunder or anything. I had forgotten that you mentioned this in the prop v. jet thread.

Dan

[Highlander]

The plug connecting all the vanes may improve efficiency.
The hole in the center (in the version with out the plug) can leak pressure in a similar way that too much tip clearance in a jet design does.

Carl

[Dan Evans]

I think it is time Yachtforums opened up a R&D department

Dan

[K1W1]

Hi,

I would not poo poo all of this straight away.

From what I understand a very high profile mega yacht builder will be using this technology for it's thrusters very soon.

[brian eiland]

Originally Posted by kach22i
Awesome, I can see this making it's way onto larger hovercraft in an air screw version.
Like this:

The NASA version.
http://www.grc.nasa.gov/WWW/RT/2003/...20emerson.html

Your magnetic turbine posting came to mine when I was looking for rim-drive propulsion concepts operated in reverse....as generators of electrical power in high tidal/current zones.

I ran across this interesting site:
Tidal Flow Generator
http://www.openhydro.com/home.html

[Dan Evans]

K1W1,
Any hints as to who?

Dan

[brian eiland]

To be installed on the new Panamax 'super-ketch'

"It’s not the only movable appendage below the waterline. Like an increasing number of new yachts, the Panamax ketch will take advantage of the advances in diesel electric power generation , in this case designed by MR Fertigung-Technologie GmbH, a German company based in Rostock. This allows the use of two retractable, electrically driven propellers developed by the award-winning Dutch company Van der Velden. By swinging or retracting the props into the hull the yacht's underbody will become perfectly flush when sailing, further enhancing -performance

Instead of using a conventional engine for propulsion, the Panamax will befitted with a number of generating sets (the likelihood is four) which, as Erik Wassen put it: “Will provide a power sharing opportunity with a priority system.”

In other words the generating sets will automatically deliver power to the numerous systems precisely when they want it and at sufficient levels, whether it be the hydraulic pumps for the big winch packages, domestic power to run the hotel systems or power for propulsion. Heavy battery banks are limited to emergency sets.

The generating system can devote all its energy to the retractable hubless props—the blades of the propellers are set on the inner surface of the circular units, which house the electric motors themselves instead of on a central hub."

...more
http://www.ybw.com/yw/blog/200700281...vid_glenn.html

http://www.balticyachts.fi/documents/Pressrelease.pdf