I received some great news by e-mail yesterday. Rainer Blank of Germany built Vanquish, the free IOM plans I have posted on my website. According to Rainer he took Vanquish with him to an IOM championship regatta, where his friend Thomas Dreyer sailed Vanquish to win the regatta.
You can find the plans here http://www20.brinkster.com/shermanyachts/tech/page3/index.html
And the results of the regatta here http://modellsegeln.net/walter/07nov04.htm (the results are in German)
Happy Sailing
-Dan
congratulations
Wis
_/ if it isn’t broken, don’t fix it! _
what is this!!!
self advertising? come on now how can this be true? no foils?. now swinging ballast?
lol ( this is scarsm)
congrats dan . the boat looks awesome and when people build your design it feels good doesnt it
cougar
long live the cup and cris dickson
P.S. you were worried about somebody getting mad. just thought i would be the one laughing at you. i surport you.
Thanks for the plan…
OK, new bloke question… why have you put the deepest/fattest part of the hull quite a long way forward? I have a Triple Crown and the hull shape is completely different… What’s the reasoning behind your design decisions?
Cheers,
Philip Rawson
Hello Philip,
There?s nothing wrong with being a newbie, we where all one at some point. I?m not sure how much design lingo you know, but to get pick up allot if it here. http://www.oneoceankayaks.com/smhydro/hydro.htm
In my opinion, the three most important factors when working on a design are the LCB, Cp, and Bwl. For vanquish I wanted Lcb ~ .535, Cp ~ .555, and Bwl <7?. Once I got the parameters close to what I wanted, I jut played with the lines until the looked right to me.
It probably sound like a lot of voodoo, but I thing I think design is as much an art as it is a science.
When I first started designing, I learned an adage, that always seems to hold true ?if it looks fast, it probably is?.
-Dan
Dan,
That is great news. I would love to have one of your boats. Pehaps one day I have the time to build one. [:-bulb] Or better yet enough spare cash to have one built. Cougar you up for a project?
Tom
Seawind #80
tom me up to building my iacc20 boat and the cat
that is about it. and with the winter coming . i now have the time
cougar
long live the cup
<blockquote id=“quote”><font size=“1” face=“Verdana, Arial, Helvetica” id=“quote”>quote:<hr height=“1” noshade id=“quote”>Originally posted by dansherman
Hello Philip,
In my opinion, the three most important factors when working on a design are the LCB, Cp, and Bwl. For vanquish I wanted Lcb ~ .535, Cp ~ .555, and Bwl <7?. Once I got the parameters close to what I wanted, I jut played with the lines until the looked right to me.
It probably sound like a lot of voodoo, but I thing I think design is as much an art as it is a science.
When I first started designing, I learned an adage, that always seems to hold true ?if it looks fast, it probably is?.
-Dan
<hr height=“1” noshade id=“quote”></blockquote id=“quote”></font id=“quote”>
Cheers, it sounds a lot like designing model gliders… there’s more maths in that than you can shake a stick at…
Like every new thing I start, I have to find out exactly how it works.
Philip Rawson
<blockquote id=“quote”><font size=“1” face=“Verdana, Arial, Helvetica” id=“quote”>quote:<hr height=“1” noshade id=“quote”>In my opinion, the three most important factors when working on a design are the LCB, Cp, and Bwl. For vanquish I wanted Lcb ~ .535, Cp ~ .555, and Bwl <7?. Once I got the parameters close to what I wanted, I jut played with the lines until the looked right to me.
<hr height=“1” noshade id=“quote”></blockquote id=“quote”></font id=“quote”>
Dan
How did you decide on these numbers? Why would these numbers work better than others? Wouldn’t “Playing with the lines until they looked right” change the numbers? I’m thinking this is the witchcraft part of designing,am I right?
Don
Don Case
Vancouver IslandHi Don,
I picked these number based on what I know about full size design, and a few theories I have about model design.
I won?t give away my theories on model design, mainly because I?m not 100% certain they are correct, though the regatta results make me feel allot better about them.
For full size hulls a group of scientists and engineers, from Delft University in the Netherlands, performed a series of tow tank tests on a range of different hull forms in the 1970s and 1980s. From the tests they constructed a mathematical model that gives a ?rough? estimate of what a hulls drag will be at different velocities.
From the model they then extrapolated what the major design parameters should be at different hull speeds, to minimize drag. It should be noted that these numbers are not the holly grail of design. They don?t consider allot of things like the sea state, since they where done in a perfectly calm tow tank. However allot of people, including my self use them, as a starting point, and then evolve are design from there. I can?t say that these numbers will work better than other numbers, because frankly, other combinations might be just as good or better. The only, way to truly tell is through on the water racing. Hence why I was so happy to see the race results Rainer sent me. However I need to stress one regatta in one set of sailing conditions is not a definitive test.
Ok now to playing with the lines. I think I can answer this with an analogy. Let?s say we need to build a race car motor for someone. We are Told it can?t displace more than 300 cubic inches, it has to make at least 350 hp, and must be able to rev to 7000 rpms. Let?s look at some possibilities.
So even though I had 3 parameters I needed to meet, I could arrive at them a ton of different ways. Hence the Voodoo part is the designer deciding how he is going to arrive at the parameters he is constrained to.
-Dan
Dan
So two different hulls can have the same numbers? I sort of thought that the numbers determined the shape of the hull.
Don
Don Case
Vancouver IslandDon
That?s exactly right; multiples hulls can have the same numbers, especially when we only need to meet 3 constraints.
-Dan
Hi:
Do you have any web site to download the free plans of vanquish…somany good comments turned me on…who knows…may be the next IOM project.
Thanks.
tatolazo.
The Vanquish plans used to be at
But that site seems to have disappeared.
Hiljoball:
Bad luck with the site. It seems to me i saw the plans in a german site or similar.
Will try again on google…
Thanks anyway for your time.
Tatolazo
I GOT IT!!!
http://www.modellsegeln-bodensee.de/bootsbau.php
JUST IN CASE IT IS USEFUL FOR SOMEONE ELSE…
Hi.
Nice web site…i`llcheck it out.
Thanks
tato
Hi Guys,
Tried the link to your plan but it’s broken, can I find it somewhere else maybe??
Go well,
Steve.
:zbeer:
I have the Vanquish plans in a pdf format, deck too, if anyone wants them. I also have a layout dxf file that I got from Andy Stevenson (http://www.stevenson-central.com/wordpress/?cat=13), his Vanquish project.
Send me a PM and I’ll get them off to you when I check back in here.