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2004 - building Pjoa

This version was saved 14 years, 9 months ago View current version     Page history
Saved by Janusz Ostrowski
on June 5, 2009 at 5:32:30 pm
 

When first model proved it’s value, then building a second one, but  7 times bigger  looked not so much complicated.

But it took 7 working days before infrastructure alone was ready.

The "shipyard" was from piece of polyethylene, spreadamong trees, with old garage as one side.

Squirrels were invited to inspect quality of my work if actually cats were not on duty  :).

 

I've started as soon as vaka sections where defined - in August 2003.

Stringers,were stated basic structure and defined the shape, located within sections made from scrap material.

On top of sections, keel was glued from 2 layers of pine, integral with bows.

 

Ply sheets where scarfed and glued together to form wide ply belt.

The belt was carefully hold at the side to choose best way of persuading plywood towards compound curve defined by stringers.

In cold night hours, when temperature was well below 18 Celsius , stringers  where covered on one side with resin mixed with tixotropic silicagel.

Without any hurry ply belt could be carefully located and fixed temporarliy to stringers.

When day came, resin cured in higher temperatures.

There were hours of just watching with a beer in one hand and thinking what to do next and how to proceed.

Don't laugh from these lazy hours. They've saved from more disappointments like the one below (and pleased eyes;)

As an example of how NOT to do, I present result of cutting ply too early -before glue has cured completely:

 

Both sides sanded, where soon ready for covering with epoxy and 2 layers of glass clothes.

 

Plywood glued to strigers and covered with epoxy-glass laminate formed a shell stable enough to remove heavy sections to be replaced with lighter structure.

Open shell is very flexy for twist so attention must be paid to keep geometry as planned, and keel straight :)

 

 

Days where shorter and shorter, temperatures too low for work with epoxy and so, affter adding floor,

which closed security displacement space and made vaka stiff  we fell for winter sleep:

 

I've spent quite amount of time on traveling to the shipyard and backwards.

 

 

 

 

 

 

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