| Hobie 20 mast rotation control #17322 03/13/03 04:33 PM 03/13/03 04:33 PM |
Joined: Jun 2001 Posts: 1,459 Annapolis,MD Keith OP
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Posts: 1,459 Annapolis,MD | Stupid question time! I'm trying to figure out the stock rotation limit method for my H-20 mast. It would appear that my boat at one point had the Murrays one-line system installed on it (as evidenced by the screw holes on the underside of the boom), but it's now removed except for the relocated rotation arm and locating piece. I like the idea of the Murray's rotation set up, so I'm looking at rebuilding that. But.... I've been trying to figure out exactly how the stock set up works. Obviously the rotation limiting line goes from the end of the arm and into the grommet hole in the tramp. Then what? It would seem that a block on the end of the arm, and a continuous line from one side of the boat to the other would make it adjustable from both sides, but where does it cleat? How does it get back from under the tramp? Parts pics and stuff don't detail this, and no, I don't have the assembly manual...
Also, from the voices of experience, which way of rigging this actually is prefered? The Murrays way would be nice in that it will keep the rotation relative to the boom, but would only seem to be adjustable from the tramp. The stock way (if I understand it all) would permit control from each side, but the rotation is not maintained relative to the boom/sheeting angle. I figure for either of these, I'd use the shock cord to the bridles method of forcing over rotation. Any thoughts? | | | Re: one more time...
[Re: Will_R]
#17330 03/17/03 03:36 PM 03/17/03 03:36 PM |
Joined: May 2002 Posts: 3,114 BANNED MauganN20
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Posts: 3,114 BANNED | Could someone come up with a similar diagram for the rotation system for the H17? It involves a bungee, and a looped line around the mast and... I dunno what else. It'd be nice to have something like the above diagram to figure it out | | | Re: one more time...
[Re: Keith]
#17331 03/17/03 04:35 PM 03/17/03 04:35 PM |
Joined: Aug 2002 Posts: 117 Northern VA bsquared
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Posts: 117 Northern VA | Bungie in light air is very unobtrusive IMO; is never as much trouble as getting battens to pop over (i.e., if the battens pop by themselves, the mast will rotate by itself). You'll never have a problem gybing. NEED forced rotation to get max rotation downwind, hold the mast still in chop, and usually to get best rotation angle upwind in light air. Don't think mast/boom/sail "work together" like an 18, and I'm not convinced that system is all that good. Let's put it this way: All the Olympic Tornados have forced rotation, and not via bungie, either... I like this rotation setup; same as mine but the slack is carried to the center; slick method for no hanging lines. No mechanical advantage, though.
Man, this is a 20, it ain't a crew-on-holiday, adjust it with a hammer 18 :-)
Chris Bolton | | | Re: one more time...
[Re: bsquared]
#17332 03/18/03 12:20 AM 03/18/03 12:20 AM |
Joined: Jun 2001 Posts: 1,459 Annapolis,MD Keith OP
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Posts: 1,459 Annapolis,MD | "Man, this is a 20, it ain't a crew-on-holiday, adjust it with a hammer 18 :-)"
Hell, it's just a boat with two hulls! And my crew's usually more on the ball than me - no vacations for them, matey. I also gave up adjusting with hammers and moved up to adjusting with NACRAs. That was not successful... ;-)
I used a system similar to the stock 20 design for forcing rotation on my 18, simple, not great, but again I only had to mess with it in light air (like other boomed boats I've crewed on). The only boats I've had to use forced rotation as a matter of course in all conditions have been boomless. Sounds like the 20 needs the forcing more routinely... | | | Re: Hobie 20 mast rotation control *DELETED*
[Re: Will_R]
#17335 03/20/03 05:02 PM 03/20/03 05:02 PM |
Joined: Aug 2002 Posts: 396 Annapolis Md. LuckyDuck
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Posts: 396 Annapolis Md. | Hey Will. Do you normally have to tack the positive rotation when going to weather? We are currently using the bungie method but don't always get that 110 degree rotation we need going downwind whereas this set up would do it and we have plenty of Nacras at the yard to swipe one from. One thing I like (as crew) about the bungie is that I dont have an extra device to handle when tacking and gybing (did I spell that right?) You know how crew are, we can only remember to do a certain amount of things at each tack or gybe (does this thing have spell czech?)
Still hazey after all these beers. F-16 Falcon #212
| | | Re: Hobie 20 mast rotation control
[Re: jonr]
#17338 04/18/03 09:46 AM 04/18/03 09:46 AM |
Joined: Jun 2001 Posts: 833 St. Louis, MO, Mike Hill
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Posts: 833 St. Louis, MO, | Yes this is class legal. It was used on many boats at nationals for years.
Mike Hill H20 #791
Mike Hill N20 #1005
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