So I've got a new to me 1989 Newport 33. I've got Brion Toss' tuning explanation DVDs which I've watched and part of what I'm using as a starting point is his mention of bringing the lowers to 10-12% of load rating and uppers to 15-20% of their rating. He explains why based on stretch and length and all and this all makes perfect sense.
The boat as I received it has the rig set fairly loose compared to these figures. I also have a survey from a while back that states that the rig was "not properly tuned".
I will say that the mast is in column well. I also have measured that the step is in good position on the vessel.
So based on this I've got 7/32" wire. Which I understand to have a breaking load of about 5445 lbs.
So I then figure I want to be in these ranges:
Lowers@10% = 545 lbs
Lowers@12% = 653 lbs
Uppers@15% = 816 lbs
Uppers@20% = 1089 lbs
That translates to a PT-2 Loos gauge setting of 26 for the lowers and 30 for the uppers.
When I measured what they are currently set to I get 24/17 port and 22/16 starboard. So in order to get to the settings recommended I need to add a little over or under 400 pounds to each wire. This is a deck stepped mast with a wooden compression post in the cabin. I just want to verify that this seems like a reasonable starting point for me to shoot for and to then finish the tune while underway.
Thanks much
~Brett
The boat as I received it has the rig set fairly loose compared to these figures. I also have a survey from a while back that states that the rig was "not properly tuned".
I will say that the mast is in column well. I also have measured that the step is in good position on the vessel.
So based on this I've got 7/32" wire. Which I understand to have a breaking load of about 5445 lbs.
So I then figure I want to be in these ranges:
Lowers@10% = 545 lbs
Lowers@12% = 653 lbs
Uppers@15% = 816 lbs
Uppers@20% = 1089 lbs
That translates to a PT-2 Loos gauge setting of 26 for the lowers and 30 for the uppers.
When I measured what they are currently set to I get 24/17 port and 22/16 starboard. So in order to get to the settings recommended I need to add a little over or under 400 pounds to each wire. This is a deck stepped mast with a wooden compression post in the cabin. I just want to verify that this seems like a reasonable starting point for me to shoot for and to then finish the tune while underway.
Thanks much
~Brett