Great idea, I will get some of my staff onto it right away. Oops, I don't have any staff.
Great idea, I will get my staff onto it right away. Oops, I don't have any staff.
Happy to consider any alternatives. Needs to be somewhere that has Files and Photos sections as well as the chat. Also needs to either be very simple to set up, or there needs to be a volunteer.
It is also well past time for the web page to be updated. Once Sol2 is complete, this will be the next job, unless anything more interesting appears. Yeah, I know I been saying this every few months since Michelle left, but it does not have to be very interesting (to me) to be more interesting than the web page. Anyone with any suggestions on this (the web page or my attitude), please feel free to speak up.
regards,
rob
Rob,Have you ever considered hosting your own forum? Say... using the same as BoatDesign.net. I understand they're free, but would take some of your or your employee's time. Maybe, there is someone here that can make some suggestions. For all I know, there might be some free service just like this Yahoo group thing, but forum based. But, the ability to post based on a thread and having the pictures and files as part of the thread seems powerful. Being such a short timer, I wonder what I have missed in the past. And I don't see any way to really research that gold mind.Dennis
From: Rob Denney <harryproa@gmail.com >
To: harryproa@yahoogroups.com.au
Sent: Thu, August 5, 2010 6:34:48 AM
Subject: Re: [harryproa] Wave Interference
Fascinating stuff. Not sure if you have a repository for all the test hulls you do, but if you don't, it would be great to have them all in the Files section.
Looks like rudders have to go on my to do list as well.
rob
On Thu, Aug 5, 2010 at 6:59 PM, willoughby_rick <rickwill@bigpond. net.au> wrote:
Curiosity got the better of me.
I have looked at the lowest drag hulls for 4t combined; with 3t on the lw and 1t on the ww. The hulls just happen to end up 21m and 13m long and total drag at 15.9kts is 2360N. The individual hulls have a drag of 1577N for the lw and 779N for the ww. So the interference is detrimental even at the optimised speed although I did have a max beam constraint of 8m and settled at 7m WOA.
There is detrimental interference maximising at 37N at 11.8kts when total drag is 1196N. Above 17kts the interference is mostly beneficial but too small to worry about. - always well under 1% of total.
This initial look suggests wave interference is a second order factor. It would pay to do a check with the ww hull more heavily loaded.
Putting time into the rudders is going to be much more rewarding in terms of performance than playing with wave interference. Likewise the selection and placement of the rig has big potential.
Rick