I've made a huge mistake.

With a busted vang bolt that is impossible to replace, it is time to do some mods that have been put-off for a long time. The perfect christmas project...sigh.

The original vang base was too far aft to achieve a decent amount of rake without having issues being able to ease the sail. It is being converted to a strop around the king post to alleviate the issue. To install the strop access beneath the foredeck is required which is where things get exciting and frustrating.

Lots of cutting and grinding of big bloody holes around probably the most complexly loaded part of the hull. Deciding how to seal up the holes is daunting and I'm still not sure how to do it. Hopefully it comes out looking like the picture in my head.

mSCOW Construction Drawings

In my previous post I mentioned I have been working on a set of drawings for a scow for a sailor at my club. Brian has now completed his boat - he has done a great job, it looks fantastic and the carbon foam sandwich mas made it stiff, strong and light. The chain plates and forestay are highly engineered (for a scow) allowing us to make the bow razor thin. 

This design is very much a development from the Bunyip IX. I started with the a table of offsets from this proven hull, refaired it slightly and adapted the shape and construction for carbon foam sandwich. 

From what I understand, the designer of the Bunyip IX, Ray Hilton, passed away in the mid 90s. His son was happy for the plans for this earlier boat to be available free online. The plans for this modern development are also available below. First the PDF construction plans, then the CAD files to issue to get the panels cut, and finally a 3d model for those with the software.  

I used the same construction methodology as my SLINO foiler, using CNC carbon panels and a female assembly jig for rapid construction. As the scows were traditionally a stressed ply construction, the carbon panels look much more 'natural' than my narrow skiff.  

PDF Plans

mSCOW-01A - Perspective and Bill of Materials

mSCOW-02A - Sail and Foil Plan

mSCOW-03B - Construction Plan

mSCOW-04B - Carbon Panel Cut Files

mSCOW-05B - Jig Assembly

mSCOW-06A - Assembly Jig Cut File

mSCOW-07__08A - Panel Markings

mSCOW-09A - Shroud Reinforcement

mSCOW-10A - Centreboard Case Construction

mSCOW-11__12A - Transverse Sections

CAD Cut Files

mSCOW-04B - Carbon Panel Cut File

mSCOW-06A - Assembly Jig Cut File

3d Model

mSCOW Rhino3d Model

mSCOW - Plans coming soon

Been a while between posts but a lot of development and not much sailing going on. 

The design of this one is complete for a sailor at my club and it is currently under construction.

I'll publish the plans here at the start of the season. 

The plan is for a rig unlike any I have seen on a scow - a lot more interesting that this one. 

Plans for that too will be available here soon too.