Re: Stus-List genoa cars and tracks - C 30 MK1 1979 (Steven Tattrie)
With tracks directly behind the shrouds, my 30-1 ‘s 155% genoa hits the spreader and shroud at about the same time. I think that seven degrees on a rather wide boat is pushing it, it seems the boat is not able to respond. Just my experience. Gary #593 From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Steven Tattrie via CnC-List Sent: Monday, April 10, 2017 2:04 PM To: cnc-list <cnc-list@cnc-list.com> Cc: Steven Tattrie <steven.tatt...@gmail.com> Subject: Stus-List genoa cars and tracks - C 30 MK1 1979 (Steven Tattrie) Hi All, thank for everyone that provided feedback on genoa track on a C mk1. Micheal Brown pointed out an interesting sailing magazine article <http://www.sailmagazine.com/racing/regattas/headsail-sheeting/> http://www.sailmagazine.com/racing/regattas/headsail-sheeting/ My take away here is I should be sheeting as close as 7 degrees up to 10 degrees depending on wind. I visited my boat this weekend and based on my trigonometry math skills I would have not issue sheeting too close . It would be difficult to meet the seven degrees in light wind. With that in mind my concern is shroud location. Does any one with tracks have interference with the shrouds? I am thinking, when the wind pick up you want to flatten the foot, visually looks like the shroud would restrict sail shape. any comments? Steve ___ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
Re: Stus-List genoa cars and tracks - C 30 MK1 1979 (Steven Tattrie)
On Mon, Apr 10, 2017 at 1:03 PM, Steven Tattrie via CnC-List < cnc-list@cnc-list.com> wrote: > > Does any one with tracks have interference with the shrouds? I am > thinking, when the wind pick up you want to flatten the foot, visually > looks like the shroud would restrict sail shape. any comments? > Steve, My 35-1 has a jib track near the shrouds. The sheet for my 95% blade trims between the forward lower and upper shrouds. Pics can be seen here: https://drive.google.com/open?id=0B_sb5TfIENvsNll4b3ZwM1B4a28 I use this track until about 22-24 knots. Above that the sheet moves to the toe rail to increase the sheeting angle to reduce heel. Larger sails trim to a genoa track aft of the shrouds. Can be seen in the same Drive folder. One factor in locating genoa and jib tracks is interference from the interior cabinetry. Dennis C. Touche' 35-1 #83 Mandeville, LA ___ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
Re: Stus-List genoa cars and tracks - C 30 MK1 1979 (Steven Tattrie)
Typically your spreaders and your side stays are going to be the limiting factors for any sail over a 100. If you have a 90 or a 100 then you would be able to sheet them in closer assuming that you had a sheet lead that was inside. In the article's example the blade jib was sheeted to a curved track mounted forward of the mast. Oddly, this sheet position wouldn't lead far enough aft and as such doesn't provide as much tension on the foor as it does on the leach. This can be solved with a jib boom and out haul which travels in front of the mast and is controlled port and stbd by cross sheeting the jib sheets forward of the mast. You'd also need a boom downhaul. So instead of all that we could simply have a sheet lead which is inboard and aft of the spreaders... Or an even smaller jib, sau 70% or 80%. Then maybe you would be able to have an inboard sheet lead which was also far enough aft to provide the necessary tension on the leach and the foot. Now you just killed the majority of your thrust anf speed attempting to sail tighter to the wind. We didn't even address what all of this is doing to the slot (headsail wind accelerating over the majnsail). Remember that you are should always be seeking the highest VMG or Course Speed (CS). Sometimes this means footing off slightly and letting the sails breath a little. Long story short, IMO the article seems to be envisioning some mystical boat which defies modern sailing technology. Our masts are set far enough back in the boat that the headsail is the primary driver. Use the largest one appropriate for the wind conditions. A 145 or 135 up to about 10 or 12 kts, 110 up to about 15 to 18 kts and a 90 for greater than 18 kts. A storm sail for anything higher than 25 kts. Use a mainsail reefed such that it balances the helm based on the selected headsail. As you noticed, it is impossible to sheet in any further than having the foot on the stays and the leach on the spreader. 45° to true wind and ~30° to apparent wind. Assuming no current and little slip this would be seen as 90° tack angles. Josh Muckley S/V Sea Hawk 1989 C 37+ Solomons, MD On Mon, Apr 10, 2017, 2:04 PM Steven Tattrie via CnC-List < cnc-list@cnc-list.com> wrote: > Hi All, thank for everyone that provided feedback on genoa track on a > C mk1. > > Micheal Brown pointed out an interesting sailing magazine article > http://www.sailmagazine.com/racing/regattas/headsail-sheeting/ > > My take away here is I should be sheeting as close as 7 degrees up to 10 > degrees depending on wind. I visited my boat this weekend and based on my > trigonometry math skills I would have not issue sheeting too close . It > would be difficult to meet the seven degrees in light wind. With that in > mind my concern is shroud location. > > Does any one with tracks have interference with the shrouds? I am > thinking, when the wind pick up you want to flatten the foot, visually > looks like the shroud would restrict sail shape. any comments? > > Steve > > > > > ___ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > ___ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
Re: Stus-List genoa cars and tracks - C 30 MK1 1979 (Steven Tattrie)
I don’t have a 30-1, so I doubt this helps; but on my 42 the shrouds are a problem when sheeting tight while going upwind and using the genny car track. From: Steven Tattrie via CnC-List Sent: Monday, April 10, 2017 2:03 PM To: cnc-list Cc: Steven Tattrie Subject: Stus-List genoa cars and tracks - C 30 MK1 1979 (Steven Tattrie) Hi All, thank for everyone that provided feedback on genoa track on a C mk1. Micheal Brown pointed out an interesting sailing magazine article http://www.sailmagazine.com/racing/regattas/headsail-sheeting/ My take away here is I should be sheeting as close as 7 degrees up to 10 degrees depending on wind. I visited my boat this weekend and based on my trigonometry math skills I would have not issue sheeting too close . It would be difficult to meet the seven degrees in light wind. With that in mind my concern is shroud location. Does any one with tracks have interference with the shrouds? I am thinking, when the wind pick up you want to flatten the foot, visually looks like the shroud would restrict sail shape. any comments? Steve ___ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated! ___ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
Stus-List genoa cars and tracks - C 30 MK1 1979 (Steven Tattrie)
Hi All, thank for everyone that provided feedback on genoa track on a C mk1. Micheal Brown pointed out an interesting sailing magazine article http://www.sailmagazine.com/racing/regattas/headsail-sheeting/ My take away here is I should be sheeting as close as 7 degrees up to 10 degrees depending on wind. I visited my boat this weekend and based on my trigonometry math skills I would have not issue sheeting too close . It would be difficult to meet the seven degrees in light wind. With that in mind my concern is shroud location. Does any one with tracks have interference with the shrouds? I am thinking, when the wind pick up you want to flatten the foot, visually looks like the shroud would restrict sail shape. any comments? Steve ___ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
