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Grn_Mtns

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Reply with quote  #1 
Thanks for the inquiry.. . Here is one way to go about it.

   1)Start with your cross tube on the boat with the first mast section in hull
   2) Run a string from outside edge of tube to bow and back to opposite side of tube. Measure and hold when they are equal length.Tie the line so it will stay put.
  Your tube is now perpendicular to hull. The front and back struts do not have to be the same length.I like the  pairs to be the same length. So front pair  can be different length  from rear pair.
   3) Now stuff both the struts in the hinge on one side and leave a gap of about 3/16 from top of strut to hinge.(so strut will pivot later) Do not drill or fasten.
  3A) Slide hinge so it is over the outside of hull.
   4) Look from the end  of the cross tube - adjust the struts so they look about equal length as they bisect the seam in the hull - This is where you locate the hull mounts normally. Try to avoid any bulkheads.
  5) Take a hull mount & place it behind the strut and mark the strut where it bisects the center of the large hole. Measure the distance from the center of the hole (in end of strut) to the mark you just made.Cut this amount off top of strut.
   6) Check for fit on both sides of hull. If cross tube is square then rear struts will be close- say within 1/8 inch.
   7) Fit  two rear struts back  in hinges. Insert mounting pins through holes in strut and into hull mounts.Do not put in roll pins now. Both hull mounts are now ready to be fastened.
  8) Drill while holding mounts up to hull. Drill a hole - put in screw one at a time. So now your two rear struts are mounted to hull  and the two rear hull mounts are fastened to the hull. Put in roll pins and latches at the end of this procedure.
  9)   Leave in rear struts for now.
  10) Refit a front strut into hinge full length. Eyeball the hinge so it still looks even with the outside of hull.
    11) Get a measurement as before from center of hull mount. Measure down from top of strut and cut. Put pin in mount and locate hull mount with fasteners provided.   
  12) Do the same for the opposite side front strut.
  13) Put in latch and roll pins into struts reinstall all 4 in hull mounts.
  14) Drill and fasten end of  strut to hinge with bolt.Keep it centered on hinge.
  15) Hinge will be fastened to cross tube later after Amas are mounted. So the doublers will be in the right place and held with hinge screw. Mark hinge location  for now in case they shift.
   
Things to keep in mind:
   The main thing is the cross tube wants to be perpendicular to the hull.
   The struts do not have to be the same length front and back.But try to get each pair the same .
    With tapered hulls normally one set of struts will have to be bent or tweaked to have them lay flat against the hull mounts.
 
Good luck,
Jon

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Grn_Mtns Schooner rigged 18'6" Easy Rider Eskimo Catamaran. 17' Folbot Greenland 2 Schooner

Grn_Mtns

Avatar / Picture

Moderator
Registered:
Posts: 189
Reply with quote  #2 
Thanks for the inquiry Tim. Here is one way to go about it.

   1)Start with your cross tube on the boat with the first mast section in hull
   2) Run a string from outside edge of tube to bow and back to opposite side of tube. Measure and hold when they are equal length.Tie the line so it will stay put.
  Your tube is now perpendicular to hull. The front and back struts do not have to be the same length.I like the  pairs to be the same length. So front pair  can be different length  from rear pair.
   3) Now stuff both the struts in the hinge on one side and leave a gap of about 3/16 from top of strut to hinge.(so strut will pivot later) Do not drill or fasten.
  3A) Slide hinge so it is over the outside of hull.
   4) Look from the end  of the cross tube - adjust the struts so they look about equal length as they bisect the seam in the hull - This is where you locate the hull mounts normally. Try to avoid any bulkheads.
  5) Take a hull mount & place it behind the strut and mark the strut where it bisects the center of the large hole. Measure the distance from the center of the hole (in end of strut) to the mark you just made.Cut this amount off top of strut.
   6) Check for fit on both sides of hull. If cross tube is square then rear struts will be close- say within 1/8 inch.
   7) Fit  two rear struts back  in hinges. Insert mounting pins through holes in strut and into hull mounts.Do not put in roll pins now. Both hull mounts are now ready to be fastened.
  8) Drill while holding mounts up to hull. Drill a hole - put in screw one at a time. So now your two rear struts are mounted to hull  and the two rear hull mounts are fastened to the hull. Put in roll pins and latches at the end of this procedure.
  9)   Leave in rear struts for now.
  10) Refit a front strut into hinge full length. Eyeball the hinge so it still looks even with the outside of hull.
    11) Get a measurement as before from center of hull mount. Measure down from top of strut and cut. Put pin in mount and locate hull mount with fasteners provided.   
  12) Do the same for the opposite side front strut.
  13) Put in latch and roll pins into struts reinstall all 4 in hull mounts.
  14) Drill and fasten end of  strut to hinge with bolt.Keep it centered on hinge.
  15) Hinge will be fastened to cross tube later after Amas are mounted. So the doublers will be in the right place and held with hinge screw. Mark hinge location  for now in case they shift.
   
Things to keep in mind:
   The main thing is the cross tube wants to be perpendicular to the hull.
   The struts do not have to be the same length front and back.But try to get each pair the same .
    With tapered hulls normally one set of struts will have to be bent or tweaked to have them lay flat against the hull mounts.
 
Good luck,
Jon

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Grn_Mtns Schooner rigged 18'6" Easy Rider Eskimo Catamaran. 17' Folbot Greenland 2 Schooner
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