Thread: PDR Build in the Philippines.

Hey Mik,

" What sort of duck has teeth!"
My sort of Duck!

You and Bitingmidge are the ones who came up with the video showing the PDR closing up behind the Nutshell Pram with the "Jaw's" music in the background. I said before that that gave me an instant flash of the paint scheme.

You guys are responsible for the paint job!

I'll report on the performance after the first sail but it won't be anything stellar coz I'll be using Aquilia's 42 square foot main. Just to get her bottom wet.

CN

BTW Cybernaught - your's is the first that has used the OZ plans to make the side centreboard version I had it my head.

Looks really great - lots of space. Maybe this is the ideal cruising Duck with enough performance to race successfully!

The leeboard will be a bit slower than the centreboard - but keeping it in from the side (as a couple of the US boats have done as well) keeps the disturbed flows around the leeboard and the chine from interfering with each other and making a big draggy mess.

BTW - what have you done with the transom - I can't see the normal framing? Have you put it on the outside or have you covered it over on the inside with another piece of ply?

I probably wouldn't have gone for as many hatches - but nicely achieved!

Part of the purpose of doing the OZ plans was to give people a boost up in their own ideas. So glad to see you find your own solution but keeping the useful bits of the OZ. It was always conceived as a platform for change.

Looks fabby!

Michael

Originally Posted by Cybernaught

Hey Mik,

" What sort of duck has teeth!"
My sort of Duck!

I'll report on the performance after the first sail but it won't be anything stellar coz I'll be using Aquilia's 42 square foot main. Just to get her bottom wet.

CN

Howdy CN,

The sail area will be WAAAAY to far forward - so if you can put a spacer between the stub mast in the boat and the Yard (it is almost a tabernacle and mast isn't it?) to rake the rig back heavily then you might be able to get it up to windward OK. But I wouldn't count on it. Will go downwind just fine.

So be a bit precautionary with your sailing direction - don't want you blowing toward America in the Tradewinds!

MIK

Hi Mik,

You are right in your assumption about the transom on DI. (#218)
You said:
"BTW - what have you done with the transom - I can't see the normal framing? Have you put it on the outside or have you covered it over on the inside with another piece of ply?"

I sheeted the inside with a some 3/16th Because I wanted a cleaner look. I thought a lot about it and decided the asthetics would outweigh the weight gain.

I'm also probably going to go with a version of Tim Cleary's 2 x 4 mast. I see you have been commenting on it a bit with him on the PDRacer forum. If I go to Cebu and buy the epoxy resin and some cloth for the Oz mast the cost of the material plus the trip for Edna and I will possibly more than double my PDR cost. I have the 2x2s for the mast and spars. I'm going to do the 14 foot take apart with the extension to 16.5 foot so I can use your Lug or your Sprit sail. It will be a 3 pice mast and I think I can plane it to make it bendy enough to help de-power the sail in the gusts with the longer version for the sprit.

Short version:


This longer version has a 4 foot extension to the first mast as far as I can tell.


My thinking is to use a 1 foot filler piece bolted into the top of the first two sections of mast when using the shorter version for the Lug. I'll mod the bottom to fit into a short piece of 2"pvc pipe that will have a notch in the bottom to filt the pin on the mast step and add a bit of strength to the bottom of the mast.

Since you have had ideas about a cruising Oz PDR with racing capability and I'm heading somewhat in that dirrection I'd be happy to try out any ideas you may have along those lines, if I can, and then give you the feedback.

Your suggestions concerning my moving the DB into the airbox and adding the two stiffeners really gave me the open cockpit that I wanted. I'm very happy with the results so far. Of course the proof of the pudding is in the eating. I have started on the Oz style rudder head and tiller and I made my hinge out of SS. It's not really gudgeons and pintles in the style I'm using. I have pictures but they didn't come out very good so I'll take more and post then later. Right now it's 4am and I've been up since 1. Grandma had nightmares and the local Wokwok came over with Voodo oil and painted crosses on her with it. Don't ask! After that I was awake. I think I'll goback to bed till the carpenters get here and go back to work on the ceilings.

CN

Howdy CN,

The two part mast is rubbish. I think it will break (I won't say that to Tim - because he is an avid experimenter who enjoys the process) and doesn't have the right bend characteristics for the sail - so you lose the performance.

It will also be considerably heavier as it is double thickness for a good part of its length.

The boat will be slower in all winds and will be overpowered easily in strong winds.

I would strongly recommend the original mast.

If you want to build a solid one I can work out what size to get the right bend characteristic that will make the sail work the best.

Best wishes
Michael

You can use the glue that you have used for the rest of the boat probably for the OZ mast and there are cloth alternatives for the small areas that need to be protected from splitting or bruising.

What glue have you used so far?

Michael.

Michael

"What glue have you used so far?"

I'm using the two part epoxy that already has some filler in it. You know the one you don't like. That's all thats available here. We don't even have Elmer's Glue. We don't have any of the WPB glues anywhere in the provinces. I have used this on 3 boats so far with no problem. The PDR is #4.

What kind of materials can be substituted for FG cloth? I'm curious. I was thinking where splitting could be a problem of using nylong fishing line and doing a wrap like the siezing you can do on the end of a rope and then over-coating with epoxy.

CN

Fellow Sailors,

FYI:

PDR #218, "The Ducklaration of Independence" has been officially renamed.

She will henceforth be known as the "Muthaducker".

If you wish you may simply refer to her by her nickname: "Mom".

Duck Power!

Steve.

G'day CN

Nice duck mate!

What kind of materials can be substituted for FG cloth? I'm curious

I will probably get howled down for saying this, but I have been doing some very preliminary experiments with cotton cloth and epoxy over ply.

I don't know the poundage comparison for strength, but cotton SEEMS to wet out fine (a little harder to do) and SEEMS to add significant strength to plywood.

The only reason I bothered with this was to try to help out somebody from another country who asked the question. He had trouble obtaining FG cloth at anything like a reasonable cost.

I think a cotton/epoxy bandage could be quite good at preventing abrasion or denting at the mast partner or splitting at the end of the spars - but the glass would do it heaps better with fewer layers. Glass tape can be posted cheaply at any rate.

I wouldn't use cotton or other fabrics for anything really structural like the "glassing of foils" it doesn't have anything like the same resistance to denting (ie glass recovers - cotton dents permanently) which I think will result in the foils breaking where they emerge from the housing.

MIK