I want to run an adjustable outhaul on my boom but it is only a wave boom (suits all my sails, which are small) so it doesn't have the pulleys on the clew end.
I have removed the plastic clew end and tried a clamp on pulley system but it doesn't stay put, even with rubber padding underneath.
Does anyone have a broken boom with a three pulley system I could have?
If the arms of the back end are narrow enough I could use the whole back end, or some booms such as Aeron and prolimit have a plastic pulley assembly which is riveted on to the back end (circular cross section) which I could simply remove and rivet onto mine.
My boom is a North platinum wave boom. So I'd need either a narrow carbon (24mm?) back end or the plastic pulley assembly that would fit onto a 26mm? back end. (Just guessing the measurements because I don't have the boom with me.)
Ideas welcome.
If you can get extension tubes (not the clew/pulleys, just the tubes) that will fit your boom, and a 3 pulley back end from anything else I can adapt it
Then keep your factory back end so you still have a standard waveboom if you choose to use it without the adj outhaul
Just a thought
That one that Gazman has sugested looks good better than the one that your running Anita!
I would be more inclined to use some "knead it" like epoxy putty to fill your gap and secure the back end. My worry with extra holes and forcing it to take shape would be introducing cracks in to the carbon.
A photo of the situation would help with solution suggestion.
Rather than drill 2 new holes in the carbon tail piece (thus creating a total of 3 holes fairly close together and weaken its carbon structure unnecessarily)
- I would drill a central 3rd hole in the nylon clip on section, that lines up with your old tail piece hole. (this might sound a bit obscene to a non windsurfer)
As you rightly say, it only needs to prevent it from slipping sideways, so don't weaken the carbon.
I agree with Elmo, re using rivets. The carbon wall won't hold the thread of a self tapper very well. It would be too susceptible to over tightening.
Or another option is to drill through the whole tube and use a mushroom head bolt and nylock nut (nut being on the plastic side), all s/s of course.
Rivets would be the easiest though, although im always wary to rivet carbon, thinking that when you compress the rivets the carbon is just going to crack apart. Probably wouldnt , its just always in the back of your mind
You've probably already thought of this, but hows your carbon laminating skills? That would bring it up to the right curve. (got some spare if you need it)
If you hacksaw off those extra pieces of the new backend, either side of the pulleys, does that make the radius more manageable?
This might get it closer to the carbon, so that you can get a rivet into it.
Anita, I have a rivet gun you can borrow, don't think I have any stainless rivets though.
Your current method relies almost exclusively upon the rivets for retaining the part and stopping it from twisting under very large load from outhaul. All good if it fits right - but it doesn't.
You need to fill the gap and also have that fill assist in retention of the part.
Fill the gap with JB Weld, or Devcon 10110. Both are epoxies with a very high strength as a filler and for bonding.
I would fill all the inside, press it on, then wipe off excess. After 24 hrs, drill the holes for 2 rivets and rivet on with stainless pop rivets.
NOT alloy rivets as they will corrode in carbon.
THEN, in doing the above, the rivets are the icing on the cake, not the be-all and end-all
Anita if you can't find Devcon in the less than 500gm tin ($150!!!) I have some small qty's and guess what a half full tube that would be just right for that job.
I also have stainless rivets but unsure of the shank length
Thanks for all the helpful suggestions.
Shane gave me a similar end piece with only one rivet hole - solved the problem of drilling more holes, and provided a more professional looking result. Thanks Shane!
I reduced the dead space by wrapping the extension end with self amalgamating silicone tape. Neatened up the extension and provided a lot of grip.
Called in at a yachting supplier to get a stainless rivet and they very kindly applied it for me. It had a long grip so hopefully didn't squeeze the carbon too tightly.
Now for some wind to test it out...
