I was also watching the spray off the lee bow in the video. It looks like the sharp bow ends up having the water crawl up it vertically. It made me think that maybe just a little bit of rocker would both cut down on the spray and also push the bow up a little. Wouldn't a bow up force be good? 

I thought that Rick had an idea along the same lines; if the "keel" gets flattened out a bit and the "foot" of the bow gets trimmed so that it slants up from a couple feet back to maybe 6" above the nominal waterline, there would be an upwards push without changing the buoyancy much, since the lee bow is so fine at that point. I know a flat bottom is typically a slamming concern, but the flat section is at most a foot or so where the water would be hitting it, so I don't see how it can slam.

Thoughts?

- Gardner

On Mon, Sep 12, 2011 at 4:24 PM, tsstproa <bitme1234@yahoo.com> wrote:

 

Wow I'm impressed on how rock solid it is while sailing over all the boat looks at ease sailing at speed. Though to me just an observation , cant feel what the boat is doing , just looks like the leeward hull seems to be tring to hard going through the water. Is it topping out in its max speed potential for hull form or can the hull be pushed harder above 15knots with out any ill effect just more spray. I'm not one to worry much about spray as long as I'm not standing in the direct path of a fire hydrant!

Same look here with this hull at 15 knots.

I thought you said your boats are dry Rob :0

http://www.youtube.com/watch?v=5pOsgqrO59A&feature=BFa&list=PL16877B8994035140&lf=results_main

Todd

--- In harryproa@yahoogroups.com.au, "Henny van Oortmarssen" <henny@...> wrote:
>
> As promised I have made a video of Blind Date, now sailing with her renewed "old" rudders, sailing last Sunday September 11 under the lee shore of the dyke between Lelystad and Enkhuizen, wind from S to SW Bf. 4 to 5, max speed 12.8 kn, see
>
> http://www.youtube.com/watch?v=wftyqI2aJlo
>
> On my blog you can also find an image of the track and speed. Unfortunatly I cannot figure out yet how to show this in Google Earth (to be continued)
>
> http://framsblog.wordpress.com/2011/09/12/sailing-with-blind-date-a-harryproa-visionnary/
>
> Not to bad compared with BD's second generation rudders. My experience with BD so far was with these second generation rudders. They just didn't work. With the latest modifications, reinforcing the original rudder sleeves by Rudolf and Nol to replace the original rudders and removing these second generation rudders by Nol and me, BD is now reborn and healthy again.
>
> Only for remembering purpose, and only for that ;-) below is a short video of the second generation rudders (they now RIP)
>
> http://www.youtube.com/watch?v=bSnrijWJ5Pk
>
> Henny van Oortmarssen
>
>
> ----- Original Message -----
> From: Henny van Oortmarssen
> To: harryproa@yahoogroups.com.au
> Sent: Monday, September 05, 2011 6:03 PM
> Subject: {Disarmed} Re: {Disarmed} Re: [harryproa] Re: Wantoo vs Expeditionarry
>
>
>
>
>
> I guess he first has to recover from the work last Saturday ;-) ;-)
>
> Nol and I removed the new rudders of BD and that was hard work. Rudolf had made it to last for centuries. Real hard work and still a lot of itch over my whole body.
>
> So Nol and I have the appointment to undergo a tough test in high winds with the "new" old rudders, as soon as we both have time and the wind is blowing 20kn or more. I promise to take a video camera with me.
>
> To be continued.
>
> Henny van Oortmarssen
>