The original braces under the trampoline rail on the float almost immediately broke after starting to use the boat. It's probably due to a fault by me building them, although I can't really imagine what I did wrong. Anyway, the rail worked without the braces but I got tired of the floppy feel while walking on the trampoline, so I put five sturdy braces (pvc foam wrapped in 600 gr glass) under the rail. It's not executed very well (had to work whith the boat folded on te trailer) but for now it's ok. Rail feels much more sturdy. Problem is the attachment of the rail on the float decks is loaded the wrong way because of the rigid braces - not only in sheer because of the trampoline pulling but also 'peel' - and they are developing some cracks round the tapes which hold them on te deck. I'm still planning to repaint/refair the floats to get rid of the damage caused on the first sail of the boat, and then I will make a better and permanent solution.
zondag 7 augustus 2011
After launching the boat I stopped updating the blog. After two full seasons of sailing there are some things to mention that might be helpful or interesting for other F22 builders....
So starting with something small: the spacer in my rudder cassette is bolted with 6 mm nylon threaded rod with normal ss nuts. This might seem a bit weak solution, but till now it hasn't failed. The good thing is that in the event of the rudder breaking out, there will be no or not much damage to the cassette. I had the rudder breaking out once while motoring about 6 knots and running into probably some mud, and the nylon 'bolts' holding the spacer at the back of the cassette were easily cut by the cassette, freeing the rudder.
One thing I learned from this occasion: make a small retaining line for the spacer (the rudder is also tied to the boat with a piece of rope, by the way) to make sure you don't lose the spacer when the rudder breaks out, like the example above. I could easily collect the spacer when I lost it (it floats - it's made of cutting board which is apparently lighter then water) because I lost it in calm circumstances, but it's probably not possible to collect it with a lot of wind and waves. With the rudder and the spacer retained - and 2 or 4 spare 6mm bolts - it should be no more than a few minutes work to get the rudder up and running again.