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| 06 May 2008 12:59:39 |
| bertbarndoor |
| Info advice on mast extension, foot, and boom please??? |
Hi, should I be considering anything when purchasing a mast extension, foot, and boom please??? Are the footings board specific *Starboard Rio M 2008*? If I have a choice between 2 sizes of mast extension, what are the differences in length all about? Also for size of the boom, if I am going to get a 6.5 sail now, maybe a 7.5 down the road, what size boom should I get??? Thanks, Rob |
| 06 May 2008 16:12:54 |
| rod.r |
| Re: Info advice on mast extension, foot, and boom please??? |
hi rob as long as the base and extension match, it's personal preference...either US pushpin or europin most extensions come in either around 25cm and around 45cm. for a 6.5 and 7.5 on a 460 you could get away with a 25cm extension. personally i just have a 48cm extension for all my sails from 6.2 to 9.0 but some argue against a lot of extension inside the mast which is a valid point....alu extensions are fine a typical 6.5 sail might have a 465 luff and 195 boom a typical 7.5 sail might have a 485 luff and a 215 boom a common boom size is around 180-240 which will cover down to around a 6.0 and up to around an 8.0 i have a 190-250 carbon boom which again does all my sails 6.2 to 9.0. if people in your area routinely use bigger sails and you think an 8.5 or 9.0 might be an eventual sail size you'd use, then i'd try for something like a 190-250 carbon for a 6.5 / 7.5 / 8.5(9.0) there's nothing more frustrating than wanting that slightly bigger sail and having a boom too short by a few cm's (which i have done a couple of times) |
| 07 May 2008 00:15:38 |
| mbad@rogers.com |
| Re: Info advice on mast extension, foot, and boom please??? |
Rob, while 6.5 and 7.5 are common sizes, you could find that on a VERY light wind days, the gap between those 2 is relatively small (think % difference - not huge) Perhaps 6.5 and some 8.X would be better.. Over at my (often too quiet) lake many sailors use 8+ or 9+, or even 11+ sails! As long as you could uphaul one... If you are buying the 6.5 first, get a boom that just covers that size and spans as much as possible towards the larger sail to keep options open. No boom will cover all sizes from 4m to 9m, so you'll end up with 2 booms eventually, the other one dedicated to small sizes (less that 6.5). For sail sizes google "sail quiver gap calculator" - will help optimize your picks good winds, Marek +++ Marek -- --------------------------------- --- -- - Posted with NewsLeecher v3.8 Final Web @ http://www.newsleecher.com/?usenet ------------------- ----- ---- -- - |
| 06 May 2008 18:49:35 |
| sailquik (Roger Jackson) |
| Re: Info advice on mast extension, foot, and boom please??? |
Hi Rob, The 2008 Rio M uses a normal "twist plate"with a Starboard brass T- nut. The T-Nut comes with your board and should be wrapped in the little bubble wrap bag with the fin screws. The reason you need the Starboard T-nut (vs a std. plate nut) is that some mast base/ universal joints do not have a long enough 5/16-18 thread sticking out the bottom to accomodate the EVA deck pad. The brass Starboard T-Nut solves this problem. As far as you mast extension, that will depend on the length of the mast you buy (probably a 460 cm) and the luff length of the sail you buy. You need to have enough extension to be able to extend you mast to the specified luff length (mast length + extension). It's a good idea to have a few cm extra as you may need to really downhaul your sail to make it more suitable for higher winds and overpowered conditions. BUT If you don't need the Tall (43-45 ccm of extension adjustment (holes or grooves in the extension) get the medium 25 cm adjustment extension as too much extension up in side the bottom of your mast can cause problems. If you only need a few cm of extension on your mast, to achieve the recommended luff length, then you can 'get a "stubby" extension (they come in 2 flavors 0 adjustment, and 15 cm adjustment. You need to buy a boom that will go about 10-15 cm longer than the stated boom length (clew length) for you 6.5 m2 sail. If you are planning to upgrade from a 6.5 to a 7.5, I'd go a little longer on the boom to accomdate a 7.5. Yes it adds a little weight, but a boom that isn't extended all the way to the max. is normally stronger. You may need to purchase a tall extension when you upgrade to the 7.5 m2 rig (depends of the sail makers luff length specification. To upgrade from a 2008 6.5 m2 Sailworks Retro (with the new clew configuration) to the 2008 7.5 m2 Retro, you would need a boom that covers Here's the specs for the 2008 Retro 6.5 and 7.5 Retro 6.5 473 Luff length (460 mast + 13 cm of extension. Boom length 186 cm min. 191 cm max. Retro 7.5 495 Luff length (460cm mast with 35 cm of extension. Boom length 206 cm min. 211 cm max. So, for these 2 sails specifically you would need a boom that adjusts from about 170 cm- to 230 cm (HPL Slalom size) . You would need 2 extensions, a mid size (25 cm adjustment) and a tall extension (45 cm) to cover both sails. Hope this helps, On May 6, 3:59=A0pm, bertbarndoor <bertbarnd...@gmail.com > wrote: > Hi, should I be considering anything when purchasing a mast extension, > foot, and boom please??? Are the footings board specific *Starboard > Rio M 2008*? If I have a choice between 2 sizes of mast extension, > what are the differences in length all about? Also for size of the > boom, if I am going to get a 6.5 sail now, maybe a 7.5 down the road, > what size boom should I get??? Thanks, > > Rob |