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Re: How much rake? ....
Posted: Sun Aug 14, 2022 8:53 am
by Be Free
Jimmyt wrote: ↑Sat Aug 13, 2022 12:43 pm
DaveC426913 wrote: ↑Fri Aug 12, 2022 6:59 pm
But if the mast foot turned out
not to be horizontal, it will certainly be tilted astern.
Which would mean my mast is to
too vertical (more near 90 from the mast foot), and I would have to rake it
more to get it to 94 degrees from the foot.
Don't know that this is a valid assumption. Cabin top could be leaning forward just as easily. And since Tomfoolery reported easy roundup based on the stock setting, I'm thinking you're probably in that neighborhood. Looks like wakataka Came to the same conclusion.
I don't know about the "M" but on an "X" the mast step is bolted flat against an equally flat section of cabin top. There is no leaning forward or backward absent damage or intentional modification.
To the OP: Does your mast step appear to be bolted firmly and flatly against a flat section of the cabin top? Are there any signs of damage or intention "tipping" either forward or aft?
Re: How much rake? ....
Posted: Sun Aug 14, 2022 12:22 pm
by DaveC426913
Be Free wrote: ↑Sun Aug 14, 2022 8:53 am
Jimmyt wrote: ↑Sat Aug 13, 2022 12:43 pm
DaveC426913 wrote: ↑Fri Aug 12, 2022 6:59 pm
But if the mast foot turned out
not to be horizontal, it will certainly be tilted astern.
Which would mean my mast is to
too vertical (more near 90 from the mast foot), and I would have to rake it
more to get it to 94 degrees from the foot.
Don't know that this is a valid assumption. Cabin top could be leaning forward just as easily. And since Tomfoolery reported easy roundup based on the stock setting, I'm thinking you're probably in that neighborhood. Looks like wakataka Came to the same conclusion.
I don't know about the "M" but on an "X" the mast step is bolted flat against an equally flat section of cabin top. There is no leaning forward or backward absent damage or intentional modification.
To the OP: Does your mast step appear to be bolted firmly and flatly against a flat section of the cabin top? Are there any signs of damage or intention "tipping" either forward or aft?
Mast foot is factory standard, AFAIK. But I don't see why it couldn't be tweaked a degree or two in either direction if sufficiently motivated. Its on a pivot, after all.
Re: How much rake? ....
Posted: Sun Aug 14, 2022 1:23 pm
by Jimmyt
The reason I made that statement is, the mast base on my M is NOT parallel to the waterline.
This is taken with the waterline level. As you can see, vertical (zero rake) is 94 degrees from my mast base. Wasn’t sure if the X base was parallel to the waterline or tilted forward like the M.
Re: How much rake? ....
Posted: Mon Aug 15, 2022 8:36 am
by Be Free
There is no official rake angle referenced to horizontal or the waterline; the only one is to the cabin top. If the cabin top is not damaged and the mast step is bolted flat to the cabin top then 94 degrees to the cabin top is what he needs to aim for. Any angle referenced to horizontal or the waterline would only be conjecture. I doubt that the "X" top is parallel to the waterline either and I have no idea what the actual rake angle is to the waterline. I suspect that the actual rake is closer to 1 or 2 degrees. Four degrees rake is actually quite a bit.
In any case, measuring to the cabin top is much easier. The "X" manual includes a scale drawing that they suggest be blown up and used to measure the rake.
Re: How much rake? ....
Posted: Mon Aug 15, 2022 9:42 am
by Jimmyt
Be Free wrote: ↑Mon Aug 15, 2022 8:36 am
There is no official rake angle referenced to horizontal or the waterline; the only one is to the cabin top. If the cabin top is not damaged and the mast step is bolted flat to the cabin top then 94 degrees to the cabin top is what he needs to aim for. Any angle referenced to horizontal or the waterline would only be conjecture. I doubt that the "X" top is parallel to the waterline either and I have no idea what the actual rake angle is to the waterline. I suspect that the actual rake is closer to 1 or 2 degrees. Four degrees rake is actually quite a bit.
In any case, measuring to the cabin top is much easier. The "X" manual includes a scale drawing that they suggest be blown up and used to measure the rake.
Absolutely Agree.
Just making the point that the assumption that 4 degree mast rake was more vertical than the 94 degree recommended from mast base; might be flawed. Also, referencing Tomfoolery’s experience that the 94 degree standard setup resulted in excessive roundup for his boat with his sail plan. The sweet spot will differ based on sail plan.
Best approach would be to go to the standard 94 deg from deck and start fine tuning from there (if necessary); which is what I think you’re getting at.
Re: How much rake? ....
Posted: Mon Aug 15, 2022 12:54 pm
by Be Free
Exactly right! The factory setup is conservative and will always round the boat up in high winds. With experience you may choose to use less rake but I would not recommend more.
Re: How much rake? ....
Posted: Mon Aug 15, 2022 1:14 pm
by Dougiestyle
I have not seen any posts from Tom Foolery in quite awhile. He would normally chime in for this stuff. Anybody Know?