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 Post subject: Bow Width Measurement
PostPosted: Sat May 23, 2020 7:16 pm 
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I'm curious if anyone out there has measured the width between their bows. Apparently this measurement can change depending on how tight your dolphin striker is. More tension equals more toe-in. My 1986 boat is 80" across from the center of the bridle screws. I'd love to hear the numbers from others. Maybe determine the optimal width from the info gathered. Thanks!


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PostPosted: Mon May 25, 2020 10:55 am 
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Location: Lake Norman NC
Mine is 79.5” exactly bolt center to bolt center, with no jib tension. It’s an 85 without much mast rake, which when jib is tensioned might ever so slightly pinch the bows in a bit more but probably not enough to make any difference at all when sailing


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PostPosted: Mon May 25, 2020 10:20 pm 
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According to primary sources, when you subtract that measurement from the distance between your rudder pins, there should be a difference of 3.5 - 4.5 inches for the correct toe-in of the hulls.


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PostPosted: Tue May 26, 2020 5:08 am 
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Thanks that is good to know, will measure that as well. I appreciate the info!


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PostPosted: Tue May 26, 2020 6:35 am 
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Wait, so there is supposed to be some toe in of the hulls? I always assumed they should be parallel, which is how I adjusted mine last year. My front crossbar looked like a camel's back when I brought it home, very obviously over bent, so I had to flatten it out.


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PostPosted: Wed May 27, 2020 8:29 pm 
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Can some of the experts chime in on this? Matt?


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PostPosted: Mon Jun 15, 2020 7:51 am 
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Anyone?


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PostPosted: Tue Jun 16, 2020 8:30 pm 
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It surprises me that more people aren't interested in this discussion, but perhaps we're just splitting hairs. :wink:


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PostPosted: Wed Jun 17, 2020 6:12 am 
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aus_cat16 wrote:
It surprises me that more people aren't interested in this discussion, but perhaps we're just splitting hairs. :wink:


I think you are correct. Seems like those who competitively race take every little bit of improvement to the extreme, seems like they'd be curious to know. I'm usually out with friends just going for top speed and having fun, not too important to me, but if the hulls need to be in a certain position, I'd like them set up that way. Here are some c/p's from another post with some info to think about.

mmiller wrote:
There is little parallel on a Hobie 16. I have a couple pylon measurements that might be used as a reference. This is from a factory demo some years ago.
78 1/2" center to center forward pylons at deck
77 1/4" center to center aft pylons at deck
Fast seems to be loose striker... this allows the hulls to splay out a bit which keeps the flat outer surface more perpendicular (in the water) as the weather hull comes above the water surface.


mmadge wrote:
I have been told distance between bow tang bolts 79" distance between rudder pins 83"


ftlauderdale16 wrote:
So after measuring my boat I got 79" at the tang bolts at the front and 84" between the rudder pins.
Had Fred check his boat which is fresh out of a box and he got the same measurements.


mmadge wrote:
Interesting is the measurements change quite a bit 1"+ ,between the boat when it is just sitting rigged and when you pull on jib halyard and sheet the main hard.Strapped in pulls the bows in.


Last year when I purchased my boat, the front crossbar had the most curve I had ever seen on a 16. I had to take it off, block it on both ends and literally jump on it to flatten it out. Once I did, I measured the bottom points of the hull at the bows and sterns and adjusted so they were equal. I never checked the pylon measurement to see if they matched the factory specs. I suspect that once the rig was tensioned the bows probably pulled in a bit. After taking my boat apart yet again to epoxy the frame, I flattened the front crossbar out a little more. My front/rear pylon measurements are about 3/4" wider than spec. I'm going with what Matt says about flatter being faster by splaying out the hulls more while I have the boat apart, but you are right, maybe just splitting hairs.


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PostPosted: Wed Jun 17, 2020 7:20 pm 
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Thanks for digging up that info. Better than just "Thrum-Thrum, Clunk-clunk or Ping-Ping" :)


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