The wind peaked today during a break between the football bowl games, so I ran hull #59 out to a small nearby lake to try out the 20-25 mph wind, with gusts up...
Happen to be in Boats with an Open Mind: 75 Unconventional Designs and Concepts and you can preview part of the book at... http://books.google.com/books? ...
... Go down to the local building supply store and pick up a section of galvanized chain link fence top rail. It is also 1.5" diameter, comes in 10 foot...
Tim, The only thing that I would have suggested is that the filler inside of the alum. tube completely/tightly fill the void. What I have observed happen to a...
I am working on designing my pdracer. I absolutely will be carrying oars. For those of you with experience rowing your pdracers, facing aft for more power,...
... Hi Dave; 12.5" from the transom works for me, I am 6'1" and when sitting on a cooler, this puts my feet against the transom, giving me pretty good leverage...
Howdy Tim, in conventional racing classes a 1 1/2" diameter mast is the right size for a stayed mast for a boat the size of the PDR. Unstayed masts have to...
Generally rowlocks are APPROXIMATELY 12 inches behind the back edge of the rowing seat. Adjustments can be made for the rower from that point. Best wishes ...
Another way of preventing getting a kink in an alloy mast is to use a short piece of the same tube slotted and put on the outside of the mast. A couple of pop...
Hi, Tim. Sorry about your mast. The mast I have drawn for MOTHA JUGS will be a plywood timber box structure made of 1 x 2's and 2.25 inch wide strips of 1/4...
Yeah, I forgot to mention that I sharpen each end of the plug slightly like a pencil. First to get it started in its journey up the tube but also to prevent...
Thanks for the ideas on mast strength. There is much to consider. I think it's all too easy to underestimate the rig strength needed if you want to venture...
I am from New Mexico (14th Generation) and I am warning you Ozzies, don't invite them down under they will think they own the place. We (New Mexicans) had to...
Oh bah! I've been to New Mexico. You can keep it. :D hehe a native Texan, jeremy ... -- As far as the laws of mathematics refer to reality, they are not...
From a design point of view the diameter of a free standing mast is defined by the stability of the boat. An interesting comparison is with the Laser Class...
If I remember right, one of those incidents was the battle of Glorieta Pass, in which the Commander was a Col Chivington. jeremy <nodsworth@...> wrote:...
Guys, we just had a new member to the group who was wanting to know how to get a hull number. To that new member, I say: All answers can be found on ...
Hi, Mike. I would agree with you entirely in the case of static loads. It will take the same section of mast to overturn the boat, no matter how much sail is...
Hi, Tim. I just checked out your proposed changes in your mast design. I think you are adding much more material than you need to. Having looked at your old...
Tim, While I agree that your mast should be able to stand up to a 30 mph gust, I am surprised that you weren't able to ease the sheet enough to dump air from...
Dave, Tim and a friend were on the windward rail and likely leaning way out. Tim ain't too skinny and the friend likely 180?? That is approaching 400 lbs...
Adding 2x2 or 2x4 to a mast seems excessive. The OZ PDR masts are 2 1/4" square timber - hollow with a 1/2" wall. It is more than adequate for the righting...
Hi Dave, an unstayed mast is loaded purely by the righting moment of the boat. The wind strength does not make a huge amount of difference. The thing that...
Perfect John!!! I didn't realise the boat was being sailed two up. That way the righting moment is doubled and any mast properly designed for one person will...
Howdy Robert, I agree with some of what you say. However the highest loaded part of the unstayed mast is where it goes through the deck. Where I would depart...
I am not knowledgeable about such things but: Assuming the sail area at 65 sf with 20 mph wind = 65x1.2 lbs of wind pressure = 78 lbs horizontal force centered...
I put up a photo of the Bermudian sail that I was using: http://groups.yahoo.com/group/pdracer/spnew/view/84be?i=623 I was on a close reach and I must confess...
Hi, My name is Greg and I'm the one who posted the question of hull #'s and worked it out already, hopefully my new # is forthcoming shortly. I live in...
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