Is this a clamp on boom - like you move a big lever to tighten it ........... OR is its an old tie on boom where you loop rope around the mast a couple of times and there is no pivoting lever kinda thing on the front end?


What brand of boom?

It's a clamp on boom, this kind:





I think it's a neilpride but never really checked so not sure, it has been used a lot though, bought it from a windsurfing center.

JanPaul999 said...

sausage said...
I use a thin (1mm thk) rubber sheet on the inside of the clamp. Only need minimal boom clamp tension and it doesn't move an inch.

That sounds like a good fix that could solve my problem, I'll try to get my hands on a sheet to try that out. Thanks for the tip

I've actually been too lazy to source it but if you can get your hands on a second hand motorcycle tyre inner tube you could cut about twice as long as clamp and roll it onto mast a bit like a criket bat grip - that way you wouldn't need to pfaff around with single sheet like I sometimes do Maybe the only problem with this option is excessive friction when feeding mast up luff tube.

sausage said...
I've actually been too lazy to source it but if you can get your hands on a second hand motorcycle tyre inner tube you could cut about twice as long as clamp and roll it onto mast a bit like a criket bat grip - that way you wouldn't need to pfaff around with single sheet like I sometimes do Maybe the only problem with this option is excessive friction when feeding mast up luff tube.

Yeah, I was thinking of this already, the motorcycle tire part. I will probably just cut it in half though and put the C shaped rubber in the boom clamp. I don't really mind to pfaff pfaff around sometimes :) I will be happy to fix my boom from moving.

Mark _australia said...
JanPaul if it is *exactly* that kind boom...

So
(1) rubber bit missing?
(2) is the cleat slipping?

It's not exactly that kind, there's no rubber insert there or belonging there, it's just a regular boom clamp with no extra's there.

I think maybe the cleat is slipping though, I will have a good look at that next time I'm out.
Not sure what I can do about that though, maybe only new boom?

Agreed^^^^
But may not be a stuffed cleat, if you thread rope through the cleat and then do it up, it will slip. It needs a bit of help to grab

The rope needs to be pulled down a bit into the vee and held there as you close the lever bit. You only do that the first time though. Hard to explain. Hmm....

so you put the boom on with lever open,
pull the rope thru the cleat until it is snug - not tight - snug.
Then hold the rope down into the cleat like wrapping it around the vee a bit
Then close the lever part and you can see the rope get pulled down hard into the vee of the cleat. Like really jammed in there

Then if that is the correct tightness on the mast and no slippage, for subsequent use you never touch the rope.

If it is a new boom, I will adjust that rope in the cleat and "do up - undo - adjust" maybe 5x or more to get it right.


So is the rope just loose in the cleat?

It could also be that the rope is getting weak and needs replaced.