Group: Forum Members
Here's my take on the raincatcher:
For my first tries, I used a tarp. I found that although it was a fairly heavy one, it would billow and shed the water, as rain and wind commonly come together, in a squall or when a front passes. Also, the surface was too close to horizontal, so in a light shower, the water drops would stay on the surface and evaporate, rather than running down to be collected.
So, I got some heavy PVC cloth, 16oz/sq yd. I made an 'L' shape with long sides 2metres, short sides 1 metre (imagine a 2 metre square, then remove a quarter of it, a square of 1metre). Then I sewed the short inner sides of the 'L' together, so that I ended up with a funnel with a equilateral triangular top, with sides of 2 metres. The seams are then waterproofed with something compatible with PVC, and a half-inch plastic skin fitting is sealed into the apex of the funnel. A short piece of half-inch hose leads to a 10 litre container (to inspect the contents before pouring into the tank). The top is hemmed, and grommets and short lines are added at the corners.
This worked pretty well, both underway and at anchor, rigged over the cockpit, as some depth is needed. Two of the lines are made fast to the top guard wire, and then the funnel will fold flat against the guardwires or cockpit side until deployed. It will also fold into a neat flat package for stowing below. When rain looks like arriving, it is the work of a moment to tie the third line to the guardwire on the other side. Each time that I went through the doldrums, I could guarantee to come out the other side with full tanks.
Watermakers? who needs 'em?
By the way, this kind of triangular funnel is a good way of making drogue cones.