October 21, 2017
It’s been a long time since we hung the first float under the roof, followed by the second one. All those years they have collected only dust but now they can come down again.
Something has changed.
The port float is hanging above and behind the boat. To bring down the port float I first had to make room next to the boat. The boat has to slide sideways to create ample maneuver space for the forklift. With the help of two pallet jacks the boat easily slides sideways.
With a makeshift boat-stand clamped to the forklift I carefully lifted the float, unscrewed the tensioning straps the floats were hanging in and bring it down. However, maneuvering with forklift and boat only takes one way. The port float is still looking in the wrong direction but turning is not possible because of lacking space. The workshop crane brings the solution.
In the free space somewhere in the middle of the workshop height, I can turn the boat in the right direction and bring it back to the position at the port side of the center hull.
The other float is much easier to reach and is already hanging in the right direction. There is still not enough maneuvering space for the forklift but taking it over by the workshop crane brings the float to its position at the starboard side of the center hull.
After all the dust has been removed, the first work is putting the floats upside down for applying the Coppercoat anti-foul.
December 25, 2011
On one of the boat building forums there was a question about the practical aspects of doing a single side infusion and where the foam hull is the airtight mold. This for sure requires a meticulous job on the foam hull, preventing any piercing by screws, or repairing these very thoroughly, and a lot of attention for the bog in the joins between the foam sheets. It is good practice to use as large as possible foam parts to minimize the amount of seams. To be sure that the joint is airtight, I treat them in four stages. The first one is widening the seam with a Dremel tool and routing a V-shape in it. Then I fill these with a thick mixture of epoxy, aerosill and microballoons, the second layer a little thinner and the final layer again a little thinner. Of course this requires extra time, but doing this well is very important for the integrity of the vacuum bag. Taking shortcuts in this phase will lead to the nightmare of not getting enough vacuum for the infusion. In that stage it is too late for making repairs and the decision has to be made to give up the infusion and to go back to the hand-lay-up job.
Of course the single side infusion on a foam hull requires a closed cell and airtight foam. The A quality Corecell foam is a fine example of such a foam. The thickness I use is 15 mm (5/8″) Thinner will be more difficult and thicker must be easier in regards to making an airtight foam mold.
Have a look at the figures below to get an idea of the (extra) hours for making the foam hull (mold) and to infuse the internal hull laminate.
You can see there is a kind of learning curve. Only the last hull (Main hull port half) is made in the new workshop. The difference in working hours between the cramped workshop in my garage at home and the very comfortable and roomy workshop I have today is not very dramatic. All work has been done on my own. Working with two people is more efficient and I guess will save at least 25%.
This table and other statistics has been updated in this page on www.fram.nl
In the mean time I’m working hard (well, not today 😉 to get the main hull ready for the infusion of the external laminate. I hope to be able to do this in the first week of January 2012
Merry Christmas to all !
July 16, 2006
Fairing and painting the second float. Open this album to see the finishing of the second float. Both floats are ready now and waiting for the assembling with beams and main hull.
January 2, 2006
In this album the completion of the second float. Post curing, wingnet lashing rail and the hatches.
November 20, 2005
Laying out the dry stack of glassfibres, all the infusion consumables and the infusion of the laminate in one shot. You can find the photo’s in this album. The video below is till the moment the resin front reaches the deck line (due to exposure limitations).
September 11, 2005
Open the album to see the joining of the two float halves and the other work on bow and stern.
August 19, 2005
Last float half, the port side of the starboard float. As you can see, video quality (and tempo of labor) is getting better 🙂