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2004 - building Pjoa

This version was saved 14 years, 10 months ago View current version     Page history
Saved by Janusz Ostrowski
on June 5, 2009 at 3:53:20 pm
 

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

 It took 7 working days before infrastructure was ready.

The "shipyard" was from piece of polyethylene, spread among the 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 located within sections 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 on one side where covered with resin mixed with tixotropic silikagel.

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 do do next and how to do.

Don't laugh from these lazy hours. Thay saved my more disappointments like the one below.

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 coved 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.

 

 

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

 

 

 

 

 

 

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