TimW 1 Posted April 15, 2011 Share Posted April 15, 2011 What is really cool about the new boom is that the Top rail perfectly matches the reverse sheer of the new amas. We are launching on Wednesday morning (without the rig in). Most likely not ready to sail by Easter but have already entered the Winter series that starts on April 30th. Quote Link to post Share on other sites
TimW 1 Posted April 16, 2011 Share Posted April 16, 2011 The two curved foils ready for Tips to be fitted then Painted. Rudder Stocks, Tillers and Link Bars ready for Painting. Two centrecase cages to house the CNC Machined Bearings. Also Carbon Instrument bracket and GPS and VHF aerial mounts. Quote Link to post Share on other sites
TimW 1 Posted April 16, 2011 Share Posted April 16, 2011 New Rudder with Carbon Sheave box on top and 6m long Link Bar to join the tillers from Side to Side. Quote Link to post Share on other sites
Gappy 9 Posted April 16, 2011 Share Posted April 16, 2011 Gees the carbon off cuts bin at Halls must be looking pretty empty there Tim lots of nice black stuff there nice work Quote Link to post Share on other sites
Guest Posted April 16, 2011 Share Posted April 16, 2011 alot of work represented in those four images tim -looking good Quote Link to post Share on other sites
TimW 1 Posted April 19, 2011 Share Posted April 19, 2011 Phone calls from irate observer(s) wanting to see launching. Sorry I had to put it off until tomorrow (Thurs) morning. Lets see if Timberwolf fits in his new berth ! Quote Link to post Share on other sites
rigger 47 Posted April 20, 2011 Share Posted April 20, 2011 what time? Quote Link to post Share on other sites
TimW 1 Posted April 20, 2011 Share Posted April 20, 2011 High Tide approx 1015 Quote Link to post Share on other sites
TimW 1 Posted April 21, 2011 Share Posted April 21, 2011 Wolfy likes his new home at Westhaven. He is very happy to be back in the water. He motored briskly around from Okahu Bay, floating to his lines, and handled the Various wakes thrown at him with ease. Quote Link to post Share on other sites
Guest Posted April 21, 2011 Share Posted April 21, 2011 had a nosey around the gingawolf when we left the fuel jetty this morning, WOW. Quote Link to post Share on other sites
Guest Posted April 21, 2011 Share Posted April 21, 2011 floating to his lines Glad to hear that, wheel alignment calculations worked. whew. Quote Link to post Share on other sites
TimW 1 Posted April 24, 2011 Share Posted April 24, 2011 First Photo shows the Carbon Cage with the CNC'd plastic bearings installed. Many thanks to Russell of Absolute CNC for those ! Other two photos are of the Curved foil tips, glued on. The Tips are to prevent an equalisation of pressure at the end of the curved foil. The Tip of the curved foil is the closest to horizontal and is therefore providing the most lift, much of this lift is negated if the pressure escapes around the end. The big disadvantage of these tips is that the foil needs to be installed from the underside, up, which can cause big issues if you are in very shallow water and you need to remove the foils to prevent the boat sitting on them. Quote Link to post Share on other sites
Hurts 6 Posted April 28, 2011 Share Posted April 28, 2011 Hi Tim - you have been busy! Interested in those big tips on the board - since they have to be taken out from the underside are the curved boards essentially permanent fixtures - i.e the tips will always be in the water? I would think that could be a major downer in the light. Below is a quote from "Bull" on the use of the banana boards on TVS - they seem to find they are better off without any curved board below 10 knots. What is the plan with those boards in the light conditions? Quote Bull from Why hasn't someone part II thread - "This is an interesting discussion for sure, and without being any sort of expert by any means this is what we think we have learned at this stage after a season with curved boards. In the light we use no Curved Ama Board (CAB) as we are better off minimising drag and just using Main Board (MB). The MB is 7m long and we draw about 4.2 when fully down. We will even reduce MB in the extra light. One of the really interesting aspects of the CAB's, and these are asymetrical and can be adjusted for both horizontal and verticle angles of attack by chock changes, is that the first bit of board you put down is vertical, effectively producing horizontal lift and as you put down more the curve means it becomes horozontal, producing vertical lift. We find bellow 10- 12 knots of air up hill we use no CAB and just MB, minimum drag. As pressure increases we start running CAB up to 60% max so mostly lateral loads not lifting. So up hill that is max. As soon as the boat is over 20-22 knots of boat speed, so cracked or running in moderate or heavy, we use full CAB and she effectivly becoms a foiler with only the last 6-10ft of ama in the water and the foil taking 70-80%of the load. The difficult area is where its puffy like the harbour and you are on and off the gas and dont need full CAB all the time, its a bit of a compromise." Quote Link to post Share on other sites
TimW 1 Posted April 29, 2011 Share Posted April 29, 2011 You are spot on Dean. In the light we will pull the boards up, but leave a gap between the Tip and the hull of at least 50mm, i.e. 50mm of the Curved foil plus the tip is in the water at all times. That is the same with G3, their tips are always in the water as well. By way of perspective though, the Tips are only 6mm thick, and 100mm deep, so really there is very little drag there, at all. Quote Link to post Share on other sites
TimW 1 Posted April 29, 2011 Share Posted April 29, 2011 BTW the tips in the photo are totally wrong. The deepest part needs to be at the back, not the front. So I will have to grind those one's off and have a better go at it. Quote Link to post Share on other sites
Marshy 30 Posted April 29, 2011 Share Posted April 29, 2011 Ah bummer... Although thats a pretty small mistake to make considering the other opportunities there were for them like putting the cases around the wrong way or something far worse! Quote Link to post Share on other sites
ScottiE 174 Posted April 29, 2011 Share Posted April 29, 2011 tim - I wondered if it would be possible to 'bolt' these tips on by sinking threaded inserts into the ends. That way you'd be able to remove during a little swim so that you can fully extract the foil. I'm guessing you've already thought of this and discarded it for some reason that's gone way over my humble head. Quote Link to post Share on other sites
TimW 1 Posted April 29, 2011 Share Posted April 29, 2011 They are glassed on, so they don't crack, they need a cove on the inside, and are heavily rounded on the outside to reduce drag. Also bear in mind if the boat dries out, all the weight is on these tips. Quote Link to post Share on other sites
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