Armature For A One Gallon Egg

Going from the previous sketch diameters I constructed the armature for an egg that will hold one gallon of liquid when it is finished. Having tested the development of half I found that the foamboard was 9/16" thick, not 1/2". I redrew the development this morning and applied the new intersections of the radii to the egg countour, losing one full thickness after nine pieces.









This last photo illustrates how I converted a barstool into a sculpture stand.

Armature Development ~ One Gallon Container

After some thought I have decided to first develop an egg-shaped container that will conveniently hold one gallon of paint. I had to look up a volume formula for an ellipsoid and convert some measurements back and forth. I might go back to metric and refine things a bit. At this point I'm merely happy to develop an armature out of styro-foam that can be found in a home improvement store at 1/2" thick.
Illustrations follow which approximate the measurements I need:



The basic armature.



The short side.



The long side.

About the Size Trebuchet I Need

Got to admire the Dutch. Properly placed bottle openers say a lot.

Egg-Shaped Containers ~ The Trebuchet Project

I have an outline for a project I've been dreaming about doing for a long time. I want to use a trebuchet-launched paint projectile to paint upon the Arkansas River Levee. The projectiles themselves will be big enough to hold five gallons of acrylic house paint, an approximate fifty pound payload. My intent is to make them out of a thin-walled reinforced plaster which can withstand the sudden acceleration from the trebuchet, but not the sudden inellastic collision with the concrete berm of which the levee is made. In essence, I want to channel a once terrorising weapon built for destroying castles to paint a very inviting canvas that's been sitting there waiting for me for about eighty years.



I've started a rudimentary plan on the trebuchet.



I have also accessed one of the better target areas with Google Earth that is still rather blank, and sites from where I anticipate having the best ranging.