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| Flexi-Boom Design http://www.hobie.com/forums/viewtopic.php?f=69&t=30760 |
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| Author: | angusisthedevil [ Tue Sep 07, 2010 1:27 am ] |
| Post subject: | Re: Flexi-Boom Design |
Thanks |
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| Author: | Slaughter [ Tue Sep 07, 2010 11:53 pm ] |
| Post subject: | Re: Flexi-Boom Design |
Sorry angus I didn't see your question only timo's. I don't have enough data to form an opinion as yet. I was really happy with it on the trial and was suprised that I could keep it in while travelling upwind. I didn't do any heavy tacking manouvers and I suspect that with the angle of it, it would eventually come across and hit the scone. It's so easy to remove and assemble that I don't think I would leave it in for tacking, and there's no point anyway. I reckon I'd just leave it for downwind. Hope this helps mate. |
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| Author: | angusisthedevil [ Wed Sep 08, 2010 1:29 am ] |
| Post subject: | Re: Flexi-Boom Design |
Thanks again |
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| Author: | captain-max [ Wed Sep 08, 2010 3:57 am ] |
| Post subject: | Re: Flexi-Boom Design |
Slaughter, I keep thinking about your boom... my 'Yella Terra' could use a better sail profile downwind. I'd guess that you considered an outhaul to the amas... what made you choose the boom instead? |
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| Author: | Slaughter [ Wed Sep 08, 2010 4:23 am ] |
| Post subject: | Re: Flexi-Boom Design |
captain-max wrote: I'd guess that you considered an outhaul to the amas... ????? Sorry Max, don't get ya. Are you talk'n about adding ropes etc to pull the sail tight to the Amas ? |
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| Author: | captain-max [ Wed Sep 08, 2010 2:48 pm ] |
| Post subject: | Re: Flexi-Boom Design |
Yep. Been quite a while since I used to sail... I meant a Barber Hauler (I think). I've seen some use a bungee, whilst others use a pulley and line, to haul the sail out to the amas. |
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| Author: | NOHUHU [ Wed Sep 08, 2010 2:49 pm ] |
| Post subject: | Re: Flexi-Boom Design |
On that note,.. Here's a suggestion for anyone using tramps: Take a pair of sturdy 3' adjustable bungees with thick plastic hooks. Tighten them down to 2' in length and stretch them between the tramp straps on each side of the boat. On the leeward side, you will attach one end to the outermost tramp strap and the other to the sails grommet. This hauls the clew out and down, adjusting for conditions. Work the sheet as you normally would. As you tack back and forth, you just detach the outhaul on one side and connect it on the opposite side. During lighter winds, this will improve your sails performance on most points of sail. For downwinders, you can let it out to the 3' length and get amazing results. No installation needed, no holes, no lines to foul. Costs all of $7 US. |
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| Author: | captain-max [ Wed Sep 08, 2010 2:56 pm ] |
| Post subject: | Re: Flexi-Boom Design |
Sounds good Nohuhu. Wasn't keen on extra ropes to the back of the amas, with more cockpit clutter, and interference with fishing lines etc. How do you adjust between 2' and 3'? |
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| Author: | NOHUHU [ Wed Sep 08, 2010 3:24 pm ] |
| Post subject: | Re: Flexi-Boom Design |
These are easy to find in 30" and work well. Just slide to the length you want and lock it down in the wedge. It's what I use. Very low tech.  These look very interesting though. I like the way the endclips clean up the excess bungee.   When not in use as outhauls, they help lock down my paddle, fishing/diving gear and other items, like a surfboard. |
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| Author: | captain-max [ Wed Sep 08, 2010 3:57 pm ] |
| Post subject: | Re: Flexi-Boom Design |
They look just the thing! Haven't seen anything like that in our Oz shops though. 
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| Author: | captain-max [ Wed Sep 08, 2010 3:59 pm ] |
| Post subject: | Re: Flexi-Boom Design |
What brand are they pls? Maybe I can track them down here somewhere! |
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| Author: | NOHUHU [ Wed Sep 08, 2010 4:14 pm ] |
| Post subject: | Re: Flexi-Boom Design |
Size 9mm is the one you want.  http://www.niteize.com/products/knotbone-adjustable-bungee I can find the cheaper style adjustable shockcords at most hardware or auto stores here. |
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| Author: | Ron Papworth [ Wed Sep 08, 2010 4:31 pm ] |
| Post subject: | Re: Flexi-Boom Design |
I wonder if you guys might expound a little more for someone with a PA and a sail kit....I have used it (the sail)only a few times and just pretty much gave up on it. When I am sailing across a downwind, because the boat has so much sideboard, I find I have to keep turning upwind in order to go in somewhat of a straight line, and that often dumps the sail. Kinda like an airplane in a cross wind. At any rate, will the boom "thingy" improve the ability to make my boat go in a straight line? I guess I would better ask, why did you do it? I don't think I read anywhere why you created the boom rig. |
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| Author: | Slaughter [ Wed Sep 08, 2010 7:27 pm ] |
| Post subject: | Re: Flexi-Boom Design |
The reason why I did it Ron was because when you go downwind, the sail looses shape and belly in ( you will have to forgive me cause I'm not up on the sailing jargon, 'help Max, I'm sinking here' ) The end of the sail flaps around. The flexiboom ( for want of a better name ) holds the sail end out away from the mast giving more sail area. Probably the only reason I went this design Ron and Max was because I haven’t got tramps. If I did have them I’d possibly go with NOHUHU's idea with the bungee which is real simple and probably gives a better sail profile. But I don’t have tramps so I can’t get out to the Amas. The thought of pulleys and ropes turns me right off. I reckon there is enough gear to get in the way as it is without adding to the mix. That’s why I decided to go the one pole, nothing else, approach. Whether or not it keeps a straighter line, the jury is still out. The wind was too light to tell on that day. It was more of a, install the flexiboom, set the sail, lay back, have a snooze, and wait till the AI hits something, sort of day. I'll let you know Ron when I test it in higher winds. |
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| Author: | chrisj [ Thu Sep 09, 2010 6:51 am ] |
| Post subject: | Re: Flexi-Boom Design |
Ron, it sounds like what you need is some sort of daggerboard arrangement to stop the PA slipping sideways. Slaughter, I've been playing with something similar to your arrangement using an extendible boat hook. Works well sailing dead downwind, but not much use on other points of sail. We've got to get out together now the weather is warming up to compare notes. (Any excuse will do  ).
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