I think your rigged your main sideways

MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Apr 20, 2017 - 04:45 PM

wow
just wow
DamonLinkous

Rank: Administrator

Registered: Jul 19, 2001

Last visit: Nov 15, 2024

Posts: 3446
Posted: Apr 20, 2017 - 05:08 PM

Is there a "rest of the story" for that picture?

--
Damon Linkous
1992 Hobie 18
Memphis, TN

How To Create Your Signature

How To Create Your Own Cool Avatar

How To Display Pictures In The Forums.
--
martyr

Rank: Mate

Registered: Jul 01, 2016

Last visit: Aug 30, 2023

Posts: 631
Posted: Apr 21, 2017 - 01:24 AM

What the heck is that?

--
Marty
1984 Hobie 16 Redline Yellow Nationals, "Yellow Fever"
Opelika, Al / Lake Martin
--
Andinista

Rank: Mate

Registered: Aug 18, 2003

Last visit: Dec 13, 2023

Posts: 880
Posted: Apr 21, 2017 - 06:14 AM

Inspired in this one?
http://www.sailrocket.com

Edited by Andinista on Apr 21, 2017 - 06:15 AM.
Dogboy

Rank: Mate

Registered: Mar 19, 2004

Last visit: Nov 21, 2024

Posts: 964
Posted: Apr 21, 2017 - 06:26 AM

Windward rake is not a new concept and there have been cats with articulated rigs here and there over the years. Windsurfers have been doing this for decades. The idea is to generate a vertical lift component to raise the boat out of the water and reduce wetted surface area/drag. I would think it would be less advantageous on a boat with foils though, since the foils are already lifting the boat out of the water.

sm

Edited by Dogboy on Apr 21, 2017 - 06:28 AM.
Andinista

Rank: Mate

Registered: Aug 18, 2003

Last visit: Dec 13, 2023

Posts: 880
Posted: Apr 21, 2017 - 06:55 AM

I guess less weight on the foils means less drag, t he sailrocket is on foils too and has the speed record. The heel is also reduced, i think by the cosine of the angle
MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Apr 21, 2017 - 08:40 AM

QuoteIs there a "rest of the story" for that picture?

drank too much rum - woke up and my boat was rigged like this... What did i do?

ok - the read deal
https://www.facebook.com/Voilavion/

http://www.catsailingnews…y-crhistophe-launay.html

Edited by MN3 on Apr 21, 2017 - 08:44 AM.
Dogboy

Rank: Mate

Registered: Mar 19, 2004

Last visit: Nov 21, 2024

Posts: 964
Posted: Apr 21, 2017 - 01:31 PM

"I guess less weight on the foils means less drag, t he sailrocket is on foils too and has the speed record. The heel is also reduced, i think by the cosine of the angle "

Yes, less weight on the foils would equate to less drag, but the windward rake also equates to less forward drive. You can't get something for nothing.

Not sure about the heel being reduced. Since the rig is still locked in position and the fulcrum point is still the leeward hull (or leeward foils), there really wouldn't be any change in heel.

The reason (or part of the reason) Sailrocket is able to go so fast is because the fulcrum point is the foils under the pod, which are something like 30 feet to windward of the rig, so they are able to generate a huge amount of power from the rig while generating very little heeling moment.

sm
MN3

Rank: Master Chief

Registered: Jun 20, 2006

Last visit: May 22, 2024

Posts: 7089
Posted: Apr 21, 2017 - 01:56 PM

not the same but interesting

https://www.youtube.com/watch?v=H_gXcrx7v14

https://www.youtube.com/watch?v=QqXHgS6OSik
Andinista

Rank: Mate

Registered: Aug 18, 2003

Last visit: Dec 13, 2023

Posts: 880
Posted: Apr 22, 2017 - 10:50 AM

QuoteNot sure about the heel being reduced. Since the rig is still locked in position and the fulcrum point is still the leeward hull (or leeward foils), there really wouldn't be any change in heel.

I think you are right, I was doing wrong maths in my head... its not so clear how the heeling changes, I'm sure it does but not to say that it's the main point of this concept..