cape henry chile oct/nov

[pablobesser]

hi,

here we are working. we are in a hot spring, 32 celcius today so epoxy get solid in less then a day so all is goin on  faster.

after cutting the bulkhead in the cnc machine, i was working fast covering all in epoxi and glass 200 gm2 biaxial. cheaper! then twill.

because my search for a local marine plywood was a failure, sadly all local company dont make anymore plywood with natives species so i decided to used 12 mm exterior grade plywood made from local pine and waterproof glue for only the bulkheads.  i know pine get cracks or check easily so  i decided to glass all of it befour the set up of the frames. now i am almost done., also the steam..this was a mix of 12 mm pine cnc cut piece and 4 layers of 9 mm native plywood. looks very strong .

now must to shape the rudder and finish all the pices and  glue to the bulkheads befour assembly them in the frame. also must to make the centercase but here i will to chose if will be a metal 25 mm centercase as the plans says or a wooden alternative dudley told me will be possible and make a wooden  one with severals kilos of lead on it....will chek the metal one in some metal shop....but is not easy to move in the city because chile in now on fire because a social revolution....hope will get all finished soon but i am afraid will be for some time...

one thing i apreciate a lot was my assembly table i made earlier, made from solid glued beams perfectly scuare made so easy any glued or asembly. i glued on it the transom without any special jig and works fine tome.

so, cheers and some  photos

the assembly table.

the rudder

the steam.

[Ron Jesche CH21' Sealion']

Hi Pablo,

 I made a composite centreboard from plywood, lead and fibreglass .It is 4 layers of 9mm plywood with 100 kg of lead. I first laminated the two middle layers. and then cut out the middle of the piece leaving around 100mm around the edge. I used the cut out piece as a pattern to cast the lead. I cut it into 5 pieces about 20kg each for easier handling. The pictures show it better than I can explain. If you are not comfortable casting the lead you could use lead shot mixed with resin, this will give you nearly the same weight. Once all 4 layers have been glued together and shaped the board was glassed with 3 layers of 450 gram double bias cloth. The important points are to make sure the board is glued up on a flat surface and also to make sure you have a good bearing where the pivot bolt goes through the board. I drilled an oversized hole and glued in some solid fibreglass rod where the pivot bolt goes and also at the lifting point before glassing . Once drilled out you have a good bearing surface and the plywood is protected from any water. I also cut off 50mm of the leading edge before glassing and replaced it with some hardwood so that when the board hits the bottom the hardwood will sustain the damage and not the plywood. I hit some rocks in water with bad visibility earlier this year whilst sailing at about 5 knots. The hardwood had a small dent in it and was easy to repair without major damage to the board. The centreboard case can then be made to suit the thickness of the board. I made the board this way because I keep 'Sealion' in the water permanently and did not want the maintenance of a galvanised plate constantly immersed in salt water.I am very happy with the finished product and the thicker board allows you to get a better foil shape, and even at speed I never have any vibrations from the board. Ron

[Ron Jesche CH21' Sealion']

I just remembered there is a photo of my finished centreboard on my website. www.stainlessboatworks.com.au  look in the section Dudley Dix designs.

Ron

[pablobesser]

Thanks ron. i will do a wooden one. seems easier  then the metal one. ihad your photos, great and thanks. will follow the way you did yours.

hope to see you in santiago next march. if you need anything just let me know.

[pablobesser]

with more time then normal i keep the building faster...

all bulkheads fiberglassed and reinforced.   rudder ready,  the center board will come soon as yesterday got the 450 kilos of lead. and so on...

450 kilos of lead...not cheaper at all....

rudder almost ready...

the heat gun is wonderfull to soften the epoxi and get rid of any air buble...

[pablobesser]

hello.

here we are  encapsulated at the house for the covid 19. so at least i can build the boat.

setting the molds and now i am in the prosses to set up the  bulkhead and fighting with the laser level...

as you can see the boat fit just in the shop....

i set up a rig from the  roof so then i reach the exact altitud and the correct with the laser the horizont and fix with some screews and some diagonals.

next will be to complete the setting and glue all together included the centerboard.

i orderded the stringer local wood made by coigue tree a nice woor strong and flexible without knots. and also the new plywood made by local oak in comming soon. all if they dont close santiago under cuarentaine...