Re: [Cal_Boats] Boom Vang - Jim

Hi Jim, Just noticed this email so sorry for not getting back quicker. The advantage is that you can pull the boom down harder (obvious). I have 20 to 1 and it is way more than I need. I have that for some reasons that are unique to my boat. If you look at the expensive rigid vangs that Garhauer sells, I think they are in the 18 to 20 to 1 range. Also, look at this page from harken http://www.harken.com/rigtips/BoomVang.php and you will see the 8:1 that I was talking about. The thing is that with a vang, you can run a cascade system easily because the distance doesn't change that much. You can get 8:1 with 4 single blocks and they can cascade down in size as every one down carries 1/2 the load. It is a good idea to have the vang control line go to the cockpit so you can dump it if you are running a spinnaker and are in danger of rounding up. Serious racers use a double ended design and run it to both sides of the cockpit so it really is worth taking one line back there and just installing a cam cleat there rather than getting a fiddle block with a cam cleat. But then again it depends on how big your boat is. A Cal-20 probably needs something completely different than a Cal-40. Papoose is 36 feet and the 20:1 is nice although like I said overkill. I get the 20:1 by 5:1 times 4:1 and the geometry of the design I have requires the 5:1 and I just bought two fiddles to get the 4:1. If I had it to do over again, I would do 10:1 but I have it and there is very little disadvantage to having too much purchase. The 8:1 with 4 single blocks is 2:1 x 2:1 x 2:1. Use Amsteel on all except the line going back to the cockpit. Easy to splice and doesn't stretch. You can probably get 8:1 this way for about the same cost as 4:1 using fiddle blocks. Plus, it looks really cool to have cascaded blocks on your boat :-) I will draw it up and make a web page of it if you want. Allen On Sat, Feb 25, 2012 at 2:43 PM, Jim Ives <ne… [at] hotmail.com> wrote: > ** > > > Allen,, > > What are the advantages of having a purchase greater than 4:1? Thanks for > responding back! > > Jim Ives - Kool Beans > > ------------------------------ > To: Ca… [at] yahoogroups.com > From: al… [at] gmail.com > Date: Sat, 25 Feb 2012 10:22:43 -0800 > Subject: Re: [Cal_Boats] Boom Vang > > > Three single blocks and a cam cleat back at the cockpit. 4:1. If you > want more purchase just add some blocks or use multi blocks. Of course, if > you have a cabin sliding hatch, you would need some kind of turning block > or deck organizer. > > Allen > > > On Sat, Feb 25, 2012 at 9:08 AM, Jim Ives <ne… [at] hotmail.com> wrote: > > ** > > > > Greetings,, > > I am looking to add a boom vang to Kool Beans and wondering if anyone > has one for sale (reasonable!). It dosen't have to be fancy, just need to > get the job done. > > Thank you all in advance! > > Jim Ives - Kool Beans > Rochester, NY > > > > >