Hi Rob, Note on bowa - do get a fair few dents in. Foam and some extra toughening cloth best. What have you done? Bent polycore around in one piece to make a...
Hi all, Why apart from longer (lw) hull is a bigger boat faster? Doug Rob Denney <harryproa@...> wrote: G'day, Should not be a problem. The speed loss...
G'day, Prismatic theoretically is 0.8, but I have no accurate and easy way of measuring it to be sure. No negative rake on the bow, although there was when it...
G'day, Was going to make a single join hull, but the possible hull shapes were a bit limiting. Bent it first then glassed it. Compounded very easily and lots...
Hello Rob, What type of foam core were you using ? George Rob Denney <harryproa@...> wrote: G'day, Was going to make a single join hull, but the possible...
... Interesting, suggests to me the area relaxed in more than one dimension. If a scale was drawn on the polycore, it might be possible to see exactly where it...
G'day, More righting moment, less weight, for each unit of power. Longer means less wave effects. But the Formula 40 cats and tris used to beat the 60 and...
Hi Rob, Did you ever publish any sketches of the 60' charter proa? I'm intrigued by some of the concepts but am having difficulty visualizing the single level...
G'day, Have not had time to sort out the web page, so nothihng posted. I have sent you some renderings so you know what it is about. Can do the same to...
Rob, I am very interested in your Seabatticle renderings, but to save you replying to a lot of emails, perhaps it would be easier to upload them the files...
G'day, Hope you are enjoying your new home. I will be posting tem into files (or the web page) when the layout is complete. Meanwhile I have emailed them to...
Hello Herb, You may want to just make some test panels to start with if you have never done any resin infusion. I have made some 16" x24" foam core panels...
George, I agree. That is the reason for doing a simple infusion dinghy. Both to learn about infusion and to prove to my wife that this is not just another...
G'day, Tough is 450 double bias each side of 5mm (or whatever ply thickness is recommended if it is a ply one) H80 (80 kgs / cubic metre) foam. Lightweight is...
Rob, I have been lurking for a long time now but not kept myself in the loop re these bigger proas - I would like to see whatever images you have - dont need...
I just rejoined your news group and seen a step hull rendering recently posted in files section. Was it ever built? The step looks a little high but I guess...
G'day, Which one? My first big harry had a horizontal step. Worked well to give more space with skinny waterline. Mark (ex partner) drew an "egg" shaped...
If you mean the extended Harryproa, no not built yet. Extended slightly more to 46 ft and 25ft beam, in order to satisfy desires by "partner" (elsewise known...
Yes that is the one nice work. Do you see any concerns with the step out there being effected by waves and possibly effecting boats motion in the right/wrong...
I always thought that the layout of the Tomcat TC 9.7 would make a nice idea for the wwrd hull of the Harry. If you look at theĀ pictures of the owner berth...
Todd, Yes that is a concern although none have experience on what any of these boats will do in a problem seaway. The overhang does curve upward toward the...
-There have been a few multihull designers who reckon that a bevel works better than a radius. It may be worth having a 5cm radius at the joins to make it...
Seem to recall the bevel worked better than a radius because a) there was no hydrodynamic disadvantage, b) it provided more add'l interior volume with less...
-CHeck out the Kelsall website. He sets up a radius female mold with a bit of pvc pipe. It allows easy joining of panels, Robert ... there was no ... with less...
... reducing spray over the WW ... suggestion on how much ... Nope no idea, I'm working on the small side. So my flare width is limited to material weight used...
Do you see a cuase for an extreme load point on beams due to the varied length hulls in certain wavelength patterens. Long hull causing WW hull to pentrate...
Can't see the problem of extreme load as the overhang from ww hull is so little. Significantly less racking than equivalent cat. About amount of flare: I would...
-Another point of racking loads, if you are going into sloppy waves, they are expected to be somewhere about 45 degrees to your direction, assuming that the...
