Originally Posted by hellosailor
Last time I checked, Navtec made it pretty clear that the "life" of rod rigging
was actually dependent on load cycles. You put tension on a rod, then you release it. And the rod stretches and then contracts back. That's one load cycle. Every time you tack the boat and the rig shifts from one tack to the other, that's one load cycle.
Navtec suggests that since no one is actually counting load cycles, they can be estimated based on the type of use and amount of sailing time for any particular boat, i.e. one owner using his boat for four days per month in a six month season is putting twentyfour "days" on a boat. One boat in heavy charter
use, might be putting ten times that wear on the rigging
, in the same single
Just going by the calendar without accounting for the amount of use, or the type of use (relaxed cruising versus intense racing
and heavy weather) is going to be very expensive.
If you were at sea for all six years, sure. If you were at sea three or four days every week for six years, sure. If you weren't...Well, you could always install strain gauges and actually count load cycles on the rigging if you wanted to.
Or re-rig some other way, if you felt rod was an expensive and useless thing for your boat.
Yes, type of boat and location and use makes a huge difference. Maybe you and others can get away with less maintenance
and do it in a cost effective way. The inspection
period ranges between 1 and 10 years for a major level C inspection
going off their table.
For my boat (heavy), location (hot and sea water) and use (strong wind) I am at the middle the range and I believe I am being recommended to do the C service
at 6 years max. As mentioned before this makes it necessary although not obligatory (i.e. I'd be stupid not to) to replace most of it at 6 years and all of it at 10/12 years inc turnbuckles.
Which led me onto trying to understand why the rod has such a short potential life that it needs so much maintenance
attention, expense and early replacement. What could be done differently? I am sure there are other materials that won't require this sort of effort. Simplest it seems is a better grade of stainless and I am sure the best modern grades will be maintenance free for many times the life of 316 and at a high level of safety
. The way corrosion
is unpredictable is what scares me. We really should all have rigs with a negligible corrosion
Of course there are other corrosion free materials that ought to have minimal maintenance such as carbon, titanium and Dyneema
, they may work but a modern steel
seems to me to be a good, simple, inexpensive way to go.