Jump to content

What mast spar on a J/111?


Recommended Posts

I'm trying to figure out the mast wall thickness on a J/111 mast, or at least what model spar is used. The owner's manual does not say, and I have emailed RigPro with no reply. Any ideas? I ask because I'm trying to select the correct well nut to use for instrument bracket mounting. I don't want to glue it, because I'll likely be changing it in the near future.

 

Link to post
Share on other sites

Well nuts are cheap just get an assortment. a long well nut will still tighten even if the wall is smalle . I would say it is between 1/8" and 3/8" 

Link to post
Share on other sites
3 hours ago, George Dewey said:

I'm trying to figure out the mast wall thickness on a J/111 mast, or at least what model spar is used. The owner's manual does not say, and I have emailed RigPro with no reply. Any ideas? I ask because I'm trying to select the correct well nut to use for instrument bracket mounting. I don't want to glue it, because I'll likely be changing it in the near future.

 

I vote for 6 x M4 x 12mm Hex Socket Button Screws in Titanium + a small amount of Sikaflex just around the screw. Will help with vibrations + add extra safety. 

You want to remove the bracket before removing the rig. Properly done this will work for many seasons.

 

 

55036_1__3.jpeg

  • Like 1
Link to post
Share on other sites
On 7/28/2021 at 4:45 AM, Blur said:

I vote for 6 x M4 x 12mm Hex Socket Button Screws in Titanium + a small amount of Sikaflex just around the screw. Will help with vibrations + add extra safety. 

You want to remove the bracket before removing the rig. Properly done this will work for many seasons.

 

 

55036_1__3.jpeg

Thanks Peter, your vote carries tremendous weight, but this is exactly how the bracket is mounted now, and all the holes are stripped. I put them back in using some orange thread locker but some of those are working their way out as well. 

Link to post
Share on other sites

Smaller boats like j70 have strap-on brackets.  Would you be willing to go with something like that?  Beats drilling more holes.

Since you already have holes, perhaps a belt and suspenders approach where you use straps and screws with the straps helping keep the screws in place.

Any solution like this may require a DIY bracket.  I tend to favor bending and cutting 7k series sheet aluminum but better fabricators than I would do it in carbon fiber.

Link to post
Share on other sites
1 minute ago, Teener said:

Any solution like this may require a DIY bracket.  I tend to favor bending and cutting 7k series sheet aluminum but better fabricators than I would do it in carbon fiber.

Not a bad idea, thanks!

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...