| Re: Mainsheet blocks
[Re: waynemarlow]
#185993 07/23/09 02:33 PM 07/23/09 02:33 PM |
Joined: Feb 2004 Posts: 3,528 Looking for a Job, I got credi... scooby_simon Hull Flying, Snow Sliding.... |
Hull Flying, Snow Sliding....
Carpal Tunnel
Joined: Feb 2004
Posts: 3,528 Looking for a Job, I got credi... | Does anyone have an idea on how to splice D12 onto a conventional sheet, I want to change to an 8:1 but it will mean my sheet is too short, easiest would be to splice in a smaller sheet for the section that does'nt emerge through the ratchet block. What's the "conventional" sheet? It's easy with Maffi!
F16 - GBR 553 - SOLD I also talk sport here | | | Re: Mainsheet blocks
[Re: Matt M]
#186050 07/24/09 03:27 AM 07/24/09 03:27 AM |
Joined: Jul 2007 Posts: 976 France pepin
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Posts: 976 France | If I ever need a new system I'd probably go for an in boom cascade. [...] Most boats now use a direct block to sail connection. This means the sail cut has to be boat specific, but the boom can be very light as there is just a minor compression load on it. To go cascade you now have all the loads being sent into and through the boom plus the added compression load from the internal cascade. You need a bigger stronger boom for this plus the added room needed to mount the cascade.[...] I was talking about it in the context of my current boat. I have right now a direct connection between the clew of the main and the blocks, around the boom. But I'm going to switch back to connect the boom to the blocks. My main clew is a little too far forward and when I sheet in hard upwind it pulls the foot of the sail tight. I also like the fact that when connected to the boom the mainsheet applies positive rotation to the mast. My boom is beefy enough to take the loads. Anyway, it's a theoretical discussion: as long as my blocks are working I don't see the point of changing them... | | | Re: Mainsheet blocks
[Re: tshan]
#186406 07/29/09 12:23 AM 07/29/09 12:23 AM |
Joined: Jan 2004 Posts: 196 Arkansas, USA CaptainKirt
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Posts: 196 Arkansas, USA | Tshan- Did you note the actual boat in the photo did NOT have that bottom block but clearly a single large ratchet block at the bottom with multiple sheave on top?? Mike used the 10:1 off one of his other boats at the Horn Island Hop and really liked it he told me. Per my understanding the larger the diameter of any block the less the rolling resistance, all other factors equal, so I favor a quad/quint(?) at the top. If going center sheeting can easily make a 2:1 "doubler" system- already have to have stronger boom- but any cascading system will have a set "range" of adjustment- at least at it's maximum purchase.
Kirt
Kirt Simmons Taipan, Flyer
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