tag:blogger.com,1999:blog-1423688743286113994.post2794188646801533209..comments2023-08-16T05:11:22.952-04:00Comments on madmothist: Hotdogging in RyeJoe Bousquethttp://www.blogger.com/profile/18292612536072788020noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-1423688743286113994.post-23345347761239184262008-11-07T06:04:00.000-05:002008-11-07T06:04:00.000-05:00Thanks, Karl. I suspected as much. On the Hungrry ...Thanks, Karl. I suspected as much. On the Hungrry Beaver in 4 knots of breeze upwind, I didn't see significant slowing even when the flare was at the waterline. Again, the cable was disconnected and the wand pulled clear of the water. My forward, bow down attitude also brought the luff more vertical. It was a little silly watching the Contenders drift up wind with the mast raked 20 degrees aft.Joe Bousquethttps://www.blogger.com/profile/18292612536072788020noreply@blogger.comtag:blogger.com,1999:blog-1423688743286113994.post-28961501756781169172008-11-06T23:45:00.000-05:002008-11-06T23:45:00.000-05:00Joe: the answer is totally dependent upon foil sec...Joe: the answer is totally dependent upon foil section. The zero lift AOA for your foil is negative five degrees, so you can submerge your entire stem before worrying about what Phil is referring to, esp if you have it mounted a degree or two positive to begin with. HTH.Karlhttps://www.blogger.com/profile/15160777531235205252noreply@blogger.comtag:blogger.com,1999:blog-1423688743286113994.post-48108030712705194342008-11-06T17:26:00.000-05:002008-11-06T17:26:00.000-05:00Phil: Thanks for the thoughts. I agree about "too...Phil: Thanks for the thoughts. I agree about "too much." But what is "too much?" Here's what I was thinking: with the boat level, and the wand cable disconnected so that the mainfoil flap can find its minimum resistance position (and it readily does, flopping up and down as the boat moves through the swells) wouldn't a zero AoA be the minimum resistance position? And if the overall AoA of the mainfoil is slightly positive (say 2 degrees) then the bow would need to drop to zero out the mainfoil. A little trig shows the bow down by 2 inches will result in a decrease in AoA of 2 degrees (over a 60 inch length.) I suspect, anything more than 2 inches would result in a negative AoA and start to build the drag back up. In displacement mode I would bet that the bow knuckle would be underwater a couple of inches in level trim, hence my dropping the bow down even more. I do know I was outpointing and moving faster than Chris in a BR, but it might have been the sail.<BR/><BR/>More boat-to-boat testing is required, I suspect. But who wants to sail in the light stuff?<BR/><BR/>JoeJoe Bousquethttps://www.blogger.com/profile/18292612536072788020noreply@blogger.comtag:blogger.com,1999:blog-1423688743286113994.post-60486124344196745392008-11-06T17:12:00.000-05:002008-11-06T17:12:00.000-05:00Joe, Too much bow down in light air puts the foil ...Joe, Too much bow down in light air puts the foil in negative AOA and that is heaps more drag than transom or gantry drag. Better to sail with foil at slight +ve AOA which is minimal drag.<BR/>Phil SPhil Stevensonhttps://www.blogger.com/profile/04119956866591088255noreply@blogger.com