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Wavepiercing monohull with keel ?! #60229
11/03/05 05:27 AM
11/03/05 05:27 AM
Joined: Jun 2001
Posts: 9,582
North-West Europe
Wouter Offline OP
Carpal Tunnel
Wouter  Offline OP
Carpal Tunnel

Joined: Jun 2001
Posts: 9,582
North-West Europe

Take a look at this video clip.

It shows how the V70 boats are quickly discovering that you must have a wave-piercing bow at these speeds. If they push it any harder then they will almost pitchpole.

http://siteworks.volvooceanrace.uk.kpnis.nl/web/show/id=91479

Wouter


Wouter Hijink
Formula 16 NED 243 (one-off; homebuild)
The Netherlands
-- Have You Seen This? --
Re: Wavepiercing monohull with keel ?! [Re: Wouter] #60230
11/03/05 07:33 AM
11/03/05 07:33 AM
Joined: Jul 2001
Posts: 552
B
brobru Offline
addict
brobru  Offline
addict
B

Joined: Jul 2001
Posts: 552
Wouter and all,

Nice video, thanks for the link.

Kinda makes you wonder how a multi hull of the same size would do right next to the mono (..well, not really :-)...)

The Aruba Regatta starts this week, I believe some 16' are on the list.

regards,

Bruce
St. Croix
USVI

Re: Wavepiercing monohull with keel ?! [Re: Wouter] #60231
11/03/05 07:37 AM
11/03/05 07:37 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
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Posts: 12,310
South Carolina
That is going to be one wet ride around the marble.


Jake Kohl
Re: Wavepiercing monohull with keel ?! [Re: Jake] #60232
11/03/05 08:30 AM
11/03/05 08:30 AM
Joined: Jun 2001
Posts: 890
Dunedin Causeway, FL
David Parker Offline
old hand
David Parker  Offline
old hand

Joined: Jun 2001
Posts: 890
Dunedin Causeway, FL
Wavepiercing....like this?

[Linked Image]

Re: Wavepiercing monohull with keel ?! [Re: Jake] #60233
11/03/05 08:44 AM
11/03/05 08:44 AM
Joined: May 2002
Posts: 3,114
BANNED
MauganN20 Offline
Carpal Tunnel
MauganN20  Offline
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Posts: 3,114
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whodathunkit that you'd need a drysuit to run pit on a 70' ocean yacht?

Re: Wavepiercing monohull with keel ?! [Re: Wouter] #60234
11/03/05 09:03 AM
11/03/05 09:03 AM
Joined: Oct 2002
Posts: 1,226
Atlanta
bvining Offline
veteran
bvining  Offline
veteran

Joined: Oct 2002
Posts: 1,226
Atlanta
Two rudders, two boards....

Why not - 2 hulls?

Re: Wavepiercing monohull with keel ?! [Re: bvining] #60235
11/03/05 09:15 AM
11/03/05 09:15 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
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Joined: Jun 2001
Posts: 12,310
South Carolina
The lines are beginning to merge even more....

http://www.sailinganarchy.com/fringe/2005/images/LSS_7.jpg
[Linked Image]


Jake Kohl
Re: Wavepiercing monohull with keel ?! [Re: Jake] #60236
11/03/05 09:40 AM
11/03/05 09:40 AM
Joined: May 2002
Posts: 3,114
BANNED
MauganN20 Offline
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that is the ugliest lead-hauler I've ever seen.

Ecclesiastes 1:9-11 [Re: bvining] #60237
11/03/05 09:52 AM
11/03/05 09:52 AM
Joined: Jun 2004
Posts: 141
Panama City Beach, FL
steveh Offline
member
steveh  Offline
member

Joined: Jun 2004
Posts: 141
Panama City Beach, FL
Quote
That which has been is that which shall be; and that which has been done is that which shall be done: and there is no new thing under the sun. Is there a thing of which it may be said, "Behold, this is new?" It has been long ago, in the ages which were before us. There is no memory of the former; neither shall there be any memory of the latter that are to come, among those that shall come after.


Praise be to Howard I. Chapelle for preserving the memory. Amen.

If that's a wave piercer, then so is the New Haven sharpie of the mid to late 1800's. When I first saw the hull shape, it struck me how similar the forward third is to a sharpie, particularly a vertical-sided Phil Bolger sharpie. Compare the attached ABN AMRO bow pic with these New Haven sharpie pics and lines. The sharpie shown is a working boat with a deeper hull for hauling oysters. The racing boats had flatter runs aft, less rocker and huge centerboards. Comparing the hulls, the "wave piercing," or what previous generations of designers called a "wet ride," looks more a matter of low freeboard and no flare coupled with the higher speeds associated with a high length to beam ratio, extreme shallow draft and a righting ballast gimmick. The 35-ft racing sharpies at the turn of the previous century were capable of an excess of 20 knots with an L/B of 5, a draft of about 10 inches and about 10 guys out on a plank. And now it looks like SA has replaced the plank with pods.

Perhaps in another 10 years or so, Phil Bolger will be vindicated when these V70 boats have vertical topsides and hard chines.

Attached Files
60793-abn amro bow.jpg (72 downloads)
Re: Wavepiercing monohull with keel ?! [Re: MauganN20] #60238
11/03/05 09:54 AM
11/03/05 09:54 AM
Joined: Jun 2004
Posts: 141
Panama City Beach, FL
steveh Offline
member
steveh  Offline
member

Joined: Jun 2004
Posts: 141
Panama City Beach, FL
Quote
that is the ugliest lead-hauler I've ever seen.


Pshaw! Stretch those pods and reduce that center hull, perhaps even making it a square of fabric, and it has potential.

Re: Wavepiercing monohull with keel ?! [Re: steveh] #60239
11/03/05 11:09 AM
11/03/05 11:09 AM
Joined: Jun 2001
Posts: 12,310
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel

Joined: Jun 2001
Posts: 12,310
South Carolina
I think the effort in that drawing is to build a maxi something that will be allowed in the Sydney - Hobart race. They don't currenly allow "multihulls"


Jake Kohl
Re: Wavepiercing monohull with keel ?! [Re: Jake] #60240
11/03/05 11:22 AM
11/03/05 11:22 AM
Joined: May 2002
Posts: 3,114
BANNED
MauganN20 Offline
Carpal Tunnel
MauganN20  Offline
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BANNED
well they are going to come across some problems considering Jen has already publicly stated (On SA) that the design "Won't be getting anywhere near an IRC certificate".

Re: Wavepiercing monohull with keel ?! [Re: MauganN20] #60241
11/03/05 02:18 PM
11/03/05 02:18 PM
Joined: Sep 2004
Posts: 2,584
+31NL
Tony_F18 Offline
Carpal Tunnel
Tony_F18  Offline
Carpal Tunnel

Joined: Sep 2004
Posts: 2,584
+31NL
Rumour has it that the VOR70s where designed for wakeboarders...
http://team.abnamro.com/web/servlet/nl.gx.siteworks.client.http.GetFile/id=92794

Nosediving and resulting broaches are already a problem with the Open 60 monohulls, I guess the VOR70 are not much better (Or probably worse since they are required to sail upwind). Bruce Schwab added a finn to the bow of his Ocean-Planet to prevent nosediving. Also the canting keels will take a pounding and IMHO its only a matter of time before one of 'em falls of.
http://www.sailinganarchy.com/fringe/2004/op_bowlip.htm

Re: Wavepiercing monohull with keel ?! [Re: Tony_F18] #60242
11/03/05 03:43 PM
11/03/05 03:43 PM
Joined: Jun 2004
Posts: 141
Panama City Beach, FL
steveh Offline
member
steveh  Offline
member

Joined: Jun 2004
Posts: 141
Panama City Beach, FL
Do these hydrofoil things really work?

[Linked Image]

Re: Wavepiercing monohull with keel ?! [Re: Wouter] #60243
11/03/05 09:29 PM
11/03/05 09:29 PM
Joined: Jun 2001
Posts: 3,906
Clermont, FL, USA
David Ingram Offline
Carpal Tunnel
David Ingram  Offline
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Joined: Jun 2001
Posts: 3,906
Clermont, FL, USA
The mono guys call it a plumb bow and just about every modern sport boat has one.


David Ingram
F18 USA 242
http://www.solarwind.solar

"Do or do not. There is no try." - Yoda
"Excuses are the tools of the weak and incompetent" - Two sista's I overheard in the hall
"You don't have to be a brain surgeon to be a complete idiot, but it helps"

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