Hi,
This is an interesting view of the boom head clamp and mast flexing while sailing.
I remember reading somewhere that it was suggested that the boom head clamp to be tight so when you clamp it on it snaps with force. I am not sure if that was correct but, in the footage my boom head is springing with the movement of the mast. It looks very loose but it is secure.
I would imagine if the boom head clamp was so tight, not allowing for flex, that the mast has the potential to snap at this point.
What are your thoughts and do you adjust your clamp setting's each time you rig.
Anyway have a look.
Kind regards
Walt
The amount of force that can be applied with the boom clamp lever can't be anywhere near the forces that hanging your whole weight from the boom creates. Especially in landings. That said, having the clamp snap shut is something I've stopped doing now that I don't use those Aeron style heads. I used to do anything to stop the flex!
That said, the boom in the video does seem to have loads of movement. North would probably be able to market that as Evolved Progressive Bioflex Technology, but really, it doesn't look ideal. Maybe the Gopro just shows what the eye can't see?..
Somebody should point a Gopro at other booms heads.
I recall seeing a Go Pro video last year sometime where the boom head/clamp area was flexing as much as the above video if not more, and it was fairly flat water too. I use the thick (hard) rubber nolimitz shims that come with the ezzy rdm's and they feel rock solid even with minimal clamp pressure but it would be quite interesting to see if that actually was the case when sailing.
I think that is too much movement - way too much. I think maybe is not due to the mast bending, more because the boom is just too loose. Being attached with an over-centre system, like toolbox latches etc, it can exert a lot of force.
You could maybe break the mast with too much clamping force but it should be almost kinda hard to close the lever. The boom area is reinforced BTW.
Walt you should be able to attach the boom, put the mast vertical and stand on the boom at the head without it slipping down. (Don't recommend trying it, just using that as an analogy)
On land, you should be able to try and move the boom any direction you like and maybe see boom flex, but not the contact point between boom and mast open up like that.
I am curious now will have a look at mine this arvo
Hi Just back from a afternoon sail and I see what your saying Mark australia
Mark australia said quote( but not the contact point between boom and mast open up like that).
Had another look at the boom head and this time applied abit more clamp pressure but the same result as the video movement.
It does look like the mast sleeve at the boom is curved outwards therefore it is not touching the mast at all on either ends of this mast sleeve, which results in the movement as you mention there Mark australia.
I guess it might be just the boom head type.
Yeh Barn, North can have the idea just like all there other ideas.
There is alot of pressure we put on this section of the boom as we hang low in the harness lines so some movement would be present that would be normal right?.
I will gopro another new chinook boom next sail and see the results
Thanks for your replies
Kind regards
Walt
