Transporting rod rigging

[smacklin]

Question on truck transporting a boat/mast with rod rigging. Can rod rigging be coiled ? How tight diameter coil ? Is there some other approach. The back stay is longer than the mast so can't really lay it along mast. Should I leave all the other shorter segments straight or coil it all ? Guidance from folks that know. Thanks

 

[Tim R.]

No, you cannot coil it. Your best best is to lash it to the mast. It must be a deck stepped mast if the back stay is longer. Use something to extend the mast length. Maybe a 2x4 lashed partially to the mast and the rigging.

 

[Jackdaw]

Rod rigging?

Of COURSE you can coil it. Ask any rigger.

First 367s travel all over the county for regattas. All have rod rigging. All coil it into loops 2-3 foot across. We have done our several times.

 

[Tim R.]

My only experience with rod rigging was a few years ago and it was so stiff I would not have considered coiling it.

 

[Jackdaw]

My only experience with rod rigging was a few years ago and it was so stiff I would not have considered coiling it.

Tim,

Due to it's superior strength at any given size, rod rigging is normally slightly smaller in diameter than the equivalent 1x19 SS.

At first I would not have done it, but the rigger says everyone thinks so first time ;^)

You just grab it and give it a good loop. curls right around.

 

[ed stack]

According to the Navtec site, they send 75' of their rod rigging out in coils.

Ed

 

[smacklin]

Guys ... thanks for the info, I figured it could be coiled, but could not find any references. If anyone does know what the minimum bend radius is - would love some feedback (how tight the coil circle can be). Cheers

 

[FastOlson]

I owned a boat with Navtec rod rigging for a decade. When considering trucking the boat, I contacted Navtec and was told to coil it in a four foot (diameter) coil.
I ended up not having to do that, but it seemed reasonable.

 

[tkanzler]

A quick napkin 'analysis' of bend radius vs rod diameter comes up with the bend radius being proportional to rod diameter to keep the bending stress the same. I was surprised it's linear, but that's what I came up with, coming at it by two different methods. So for a given rod material, the bending radius of a rod that's twice the diameter of another would be, well, twice that. If you have the minimum bend radius for a rod of known diameter and material, you could scale the minimum bend radius up or down by the rod diameter ratio.

Using properties of Nitronic 50 SS, with Fy=55 ksi or more, a bend radius of 37.5 in for 1/8" solid rod gives max bending stress of 50 ksi, which is below yield of course.

Just napkin doodling - you should ask the manufacturer for min. bend radius, as material properties will govern here. And my math may be off. :neutral: