JulianB
Super Anarchist
- Thread starter
- #881
Great day yesterday, 90 min sail in the afternoon, 17:20 - about 18:50.
Windy had the wind at 9-10knts, Seabreeze a tad more. 12-13knts, no white caps or "lambs in the paddock" so that collaborates. I'm guessing max gust was 11-12, most of the time 9-10.
Crew weight, under cooked, think we were at 410kgs so 20% down.
GT steer initially, so I could play, OK hard to believe but tacking angle was around 70°, we did 2-3-4 tacks at that, both Jack on his watch and the Veliciteck confirmed 70ish° tacking angle.
We did look at the boats around us, yachts, Lasers, couple of 29ers and we were out pointing everything by a considerable margin.
(these are SOG directions and resulting tacking angles which makes it even harder to believe because Yaw° is factored in)
BS was mid 6's, so 6.4-6.7 and given we were 20% down on grunt, I can believe that. I was playing mainsheet, asked for some adjustments on the rigging, mostly easing D2's, moving jibs up and down, and altering jib-sheet angle, we got speed to creep up to just shy of and occasionally into the 7's. Tacking angle widened out to hi 70's, almost 80.
Downhill run, all good, no bangs, 12-13knts BS, got to the bottom, GT handed the tiller over, probably stupidly, we wanted low to hi 7's so more D2 off, drop the traveler down and hauled the mainsheet on, we did start to get BS in the low 7's, but Tacking angle was now mid 80's°.
Wind was dying (as NE'ers do) so last ride home down the Nth shore, hit 14.5knts BS at some stage under kite when we stacked the crew right aft.
Couple of really interesting things
a) upwind, crew sitting normally, BS low to mid 6's, I could see the Fin Wake, and my guess is it was 240-260mm off CL (the fin is almost exactly 4m fwd) so that's about 4° of yaw.
Push the crew fwd, get the nose in, and speed rose to hi 6's. Fin wake moved in 40-60mm.
b) Down wind, crew sitting normally, BS 12-13. Stack the boat aft, get Alex to come aft behind me (Alex is 90kgs) speed rose 1-1.5knts. In this configuration we hit the 14.5 max speed and not in some gust, just refining and refining, main in, so leach ribbons just breaking, camber up the bottom, let out-haul go, let downhaul up, trim the jib and so it exhausted properly, all that stuff.
c) the fin wake, when we started hitting 7's uphill the fin wake certainly narrowed, down under 200mm (off CL) and it was much easier to stay at or above 7knts, once you go there. Maybe that is the fin going laminar, and just like you can feel it on a 49er, it's happening also on a 89er, but it just has to much mass to notice.
I'm not sure that best VMG was achieve by going after 7 knts, more than highly likely we would have been better off targeting low to mid 6's and getting the really hi pointing angles. Water was very flat. It's a nice arrow to have in the quiver!
BTW, shroud tensions when we got back to the beach, Primaries were around 310-320kgs, D2's were negligible (we came off atleast 2 turns while sailing) D1's were up there, maybe 240-260kgs. Caps where also around the 170 mark.
At the 310-320kgs, we did have very slight F/Stay movement up-hill, and a bit more down-hill but nothing alarming. The Dynema shrouds are live up to or beyond expectation.
This is sails down measurements, what could be refereed to "Dock Settings".
We have to back the D2's off (5 turns) to get the lifting sling on.
We also back the primaries off 15 turns (from dock) to overnight, just good husbandry!
We have about 60-70kgs on the primaries and similar on the caps, over night on the hard.
Saturday is the Island Super 30 race, (up under the bridge, around a bunch of Island), it's very much a passage race, should be fin.
Go to Noumea on Sunday for a week, so there will be radio silence.
jB
Windy had the wind at 9-10knts, Seabreeze a tad more. 12-13knts, no white caps or "lambs in the paddock" so that collaborates. I'm guessing max gust was 11-12, most of the time 9-10.
Crew weight, under cooked, think we were at 410kgs so 20% down.
GT steer initially, so I could play, OK hard to believe but tacking angle was around 70°, we did 2-3-4 tacks at that, both Jack on his watch and the Veliciteck confirmed 70ish° tacking angle.
We did look at the boats around us, yachts, Lasers, couple of 29ers and we were out pointing everything by a considerable margin.
(these are SOG directions and resulting tacking angles which makes it even harder to believe because Yaw° is factored in)
BS was mid 6's, so 6.4-6.7 and given we were 20% down on grunt, I can believe that. I was playing mainsheet, asked for some adjustments on the rigging, mostly easing D2's, moving jibs up and down, and altering jib-sheet angle, we got speed to creep up to just shy of and occasionally into the 7's. Tacking angle widened out to hi 70's, almost 80.
Downhill run, all good, no bangs, 12-13knts BS, got to the bottom, GT handed the tiller over, probably stupidly, we wanted low to hi 7's so more D2 off, drop the traveler down and hauled the mainsheet on, we did start to get BS in the low 7's, but Tacking angle was now mid 80's°.
Wind was dying (as NE'ers do) so last ride home down the Nth shore, hit 14.5knts BS at some stage under kite when we stacked the crew right aft.
Couple of really interesting things
a) upwind, crew sitting normally, BS low to mid 6's, I could see the Fin Wake, and my guess is it was 240-260mm off CL (the fin is almost exactly 4m fwd) so that's about 4° of yaw.
Push the crew fwd, get the nose in, and speed rose to hi 6's. Fin wake moved in 40-60mm.
b) Down wind, crew sitting normally, BS 12-13. Stack the boat aft, get Alex to come aft behind me (Alex is 90kgs) speed rose 1-1.5knts. In this configuration we hit the 14.5 max speed and not in some gust, just refining and refining, main in, so leach ribbons just breaking, camber up the bottom, let out-haul go, let downhaul up, trim the jib and so it exhausted properly, all that stuff.
c) the fin wake, when we started hitting 7's uphill the fin wake certainly narrowed, down under 200mm (off CL) and it was much easier to stay at or above 7knts, once you go there. Maybe that is the fin going laminar, and just like you can feel it on a 49er, it's happening also on a 89er, but it just has to much mass to notice.
I'm not sure that best VMG was achieve by going after 7 knts, more than highly likely we would have been better off targeting low to mid 6's and getting the really hi pointing angles. Water was very flat. It's a nice arrow to have in the quiver!
BTW, shroud tensions when we got back to the beach, Primaries were around 310-320kgs, D2's were negligible (we came off atleast 2 turns while sailing) D1's were up there, maybe 240-260kgs. Caps where also around the 170 mark.
At the 310-320kgs, we did have very slight F/Stay movement up-hill, and a bit more down-hill but nothing alarming. The Dynema shrouds are live up to or beyond expectation.
This is sails down measurements, what could be refereed to "Dock Settings".
We have to back the D2's off (5 turns) to get the lifting sling on.
We also back the primaries off 15 turns (from dock) to overnight, just good husbandry!
We have about 60-70kgs on the primaries and similar on the caps, over night on the hard.
Saturday is the Island Super 30 race, (up under the bridge, around a bunch of Island), it's very much a passage race, should be fin.
Go to Noumea on Sunday for a week, so there will be radio silence.
jB