SV LIMA Projects

All our projects of SV LIMA.

There are many more project details in our SV LIMA premium area.

Rust is no option on a vessel - never.

Whenever something is made of metal and it is being in touch with water there is a risk of rust. We do not want rust! Our keel is made of iron and we do have to fix the rusty seam of our keel that is no longer fully sealed against the sea water SV LIMA is in.

So we have to deal with it.

Note: Planning and purchase is already done and reflected in the article below. The execution will be done shortly in spring 2021.

  • Planning -> done
  • Purchase -> done
  • Execution -> ope
  • Wrap Up -> open

In the article you already find some theory on the topic that might be valuable for you. So check it out. In the SV LIMA premium area you find even more details like e.g. planning lists, buying lists, detailed theory and more. 

 

The theory

What is a keel seam, why does a vessel have it and what is it all about?

A sailing vessel usually has a keel to lower the center of mass and to make proper sailing possible in generally. A keel is substantial part of the lateral plan of a vessel. But we do not want do dig to deep in this discussion. On SV LIMA we have a keel made of cast iron. And of course our keel is under water. That is the nature of a keel of a boat. SV LIMA has a wing keel which is pretty nice since we have a very good draft (less than 2m along with a 120m2 sail area which is fine for us). The winged keel is why our vessel has the prefix Contest 46S which is a specialised version of the boat.

 

SV LIMA on a dry-dock from portside.

 

The wing keel is connected to the hull with bolts. Due to this kind of construction - which is typically for sailing vessels - there is a seam. This seam has to be sealed. As there are always very minor movements the seam can not just be laminated with a hard compound like per example fiberglass mats and epoxy. This combination would break during movements. The seam would get in contact with water and start with the rust. This needs to be prevented.

 

Keel of SV LIMA on dry-dock. View from portside. Good view on the wings as well.

 

Keel seam from below with rust before newly sealing the seam.

 

 

The material of choice for sealing an underwater seam is a so called MS-Polymer

What is MS/MP Polymer? 

There are many names for the material: MP polymer, SMP (Silyl-modified polymers), silane-modified polymers, modified-silane polymers,...

MS polymers are polymers that have a silane ending (chemically spoken).

Products with MP polymers are

  • isocyanates (basis for polyurethane)
  • free of dissolvers (keeps it a little flexible)
  • used for sealing
  • used for adherence
  • with good UV resistance
  • with good temperature resistance

 

What are common products and which want of them do we use?

Note: You can find all info about common products and which we used for our project specifically in SV LIMA premium area. Provide us with a beer and you get access for a full year. Get more info. (If you are already premium user you can reach premium area via top level menu "SV LIMA - Premium". This is only visible if you are premium user)

 

 

 

The project

 

The project itself is currently in planning status. So we are currently working on the planning, purchasing, execution and the wrap up. All this is documented in detail and provided to you here shortly. Check also our SV LIMA premium area which has the same projects but with even more details and information for your own project(s). You can get access to SV LIMA premium area -> here(If you are already premium user you can reach premium area via top level menu "SV LIMA - Premium". This is only visible if you are premium user)

 

The purchase

Note: You can find all info about common products and which we used for our project fully detailed in SV LIMA premium area. Provide us with a beer and you get access for a full year. Get more info. (If you are already premium user you can reach premium area via top level menu "SV LIMA - Premium". This is only visible if you are premium user)

 

The project execution

In spring 2021 we are going to sandblast the entire underwater body of SV LIMA and rebuild the it completely new with epoxy primer and coppercoat. This is all going to be presented as individual project as well. Before we put on the expoxy primer and coppercoat we are going to seal the keel seam as well. 

We will let you know here and on social media (Instagram, Facebook and YouTube) when we continue with the "sealing of rusty keel seam" project. Stay tuned.

 

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