Subject: Re: [harryproa] Re: Design your proa |
From: Arto Hakkarainen |
Date: 5/16/2011, 8:04 AM |
To: harryproa@yahoogroups.com.au |
Reply-to: harryproa@yahoogroups.com.au |
Rick,
Thank you for very informative explanations. They make sense to me. Still every answer raises at least one more question :) From a sailor's point of view there are some things I keep wondering:
1) You have made very valid points for flat bottom design. However, having sailing experience mostly at Baltic Sea my worry is how the flat bottom would behave in waves and especially the choppy waves we see here. It could be quite uncomfortable and require bows to have deep V which could make the flat bottom not practical.
2) I have raised the question of bow immersion here before. Have you got any figures on the bow up forces of the flat bottom design vs. rig forces pushing the bow down? I think the question is most critical while running or broad reaching.
3) A comment, not a question: what you have said here seems to make sense to the traditional proa lee hull design with almost flat leeside and curved windward side like this Gary Dierking's Tarawa design: http://homepages.paradise.net.nz/garyd/tarawa.html .When working with no foils it must have been the most effective hull form.
Thanks for posting your analysis. Keep them coming.
Arto
A sailor and wannabe proa owner who has once sailed on Ono 43 years 2 months old with 42 years 8 months sailing experience to back up the theoretical questions
--- On Sat, 5/14/11, Rick Willoughby <rickwill@bigpond.net.au> wrote:
|