arthurgeoff44 Posted April 12, 2012 Report Share Posted April 12, 2012 Have the above, 5m length main and front tramp, ideal for family/grandkids, no serious sailing/racing. Querry is with mast, it has a extension on the base (about 20cm), hole in the end, extends towards aft of cat. There is a cutout in the main/rear tramp apparently to allow for this extension when lifting the mast. Second querry is mast connection with hull. Mast mount is a ball with a bolt port to starboard through the ball. Procedure is to position mast on ball, raise to about 30degrees then fit bolt which is essential to secure mast when raising. When mast is raised the bolt/nut is probably not necessary as the front & side stays secure the mast and the ball connection between mast and hull allow the mast to lean depending on the wind. I leave the ssteel bolt and nut in position however it is obviously under considerable stress as even the new bolt has distorted due to the movement. Summise this is when the mast leans port/starboard when tacking. Querries are therefore (1) what is purpose of mast base extension, and (2) should securing bolt through ball joint be removed when mast is raised. Hopefully the photos will attach to this thread and will clarify my querry - Geoff Link to comment Share on other sites More sharing options...
nacra-cam Posted April 12, 2012 Report Share Posted April 12, 2012 Hi. The extrusion at the bottom of the mast is the mast spanner, looking at the height of the ball on the main beam this would put the spanner approximately 200 mls. above tramp. Answer to question 2. The Hobie 18 had a pin that went through the mast base and ball when stepping the mast, the pin was then removed before the rig was tensioned .This was done so the mast wouldn't pop off the ball when stepping it. Removing the pin or bolt then allows mast to rotate. When lowering mast the reverse is done. cheers. Link to comment Share on other sites More sharing options...
darcy1945 Posted April 12, 2012 Report Share Posted April 12, 2012 The mast spanner is for rotating the mast to present the best angle of attack on all points of sail, there should be lines and cleats for its control. Link to comment Share on other sites More sharing options...
arthurgeoff44 Posted April 16, 2012 Author Report Share Posted April 16, 2012 Thanks for that, guess it was obvious that I should have removed the bolt - probably lucky I havnt done damage; a good southerly may have 'twisted' it off. Will read up on the mast spanner, not familar with the term, but have the basics on its purpose - Thanks again for your help Link to comment Share on other sites More sharing options...
darcy1945 Posted April 16, 2012 Report Share Posted April 16, 2012 Arthur, I am at Mannering Park, (40 min from Gosford), If you want any advice/ guidance, ph 43591729. Darcy. Link to comment Share on other sites More sharing options...
arthurgeoff44 Posted April 17, 2012 Author Report Share Posted April 17, 2012 Darcy, I know Mannering Park well, will keep your phone number, thanks - Geoff Link to comment Share on other sites More sharing options...
Nacra NQ Posted April 18, 2012 Report Share Posted April 18, 2012 Geoff, The boys at Bris Cat (07 3375 4911) still stock all the parts for a G Cat. They will be able to help also with any rigging questions Mick Link to comment Share on other sites More sharing options...
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