|
The rope bundles are the main engine of the machine. The framework that holds
everything together is about 24 ft long, and 6 feet tall.
The Scutula (Hole
carriers) await their fate on a pile of rocks. The round donut was
found in this shape at a scrap yard and is 1 inch thick. The green
rectangular donut was torched out of some sort of factory floor
support, and is 3/4 inch thick. (Also from a scrap yard.) These
will become the major hole carriers for one torsion bundle. A
matching set will be used for the second bundle.
Oops, we cut the holes in two of our hole carriers a bit large last
year. Here Eric is adding a couple lbs of steel back onto the
inside edge of the scutula prior to the milling operations.
Unfortunately the 1" thick scutula pieces that we had scavenged from
the scrapyard turned out to be cast iron. This prevented us from welding up
our rope bundles properly. Rather than replace them (with all the necessary
machining tasks to the new pieces) we decided to bolt on some steel adapter
plates (auriculae) that can be welded to the stanchions. Here we are
drilling and tapping holes in the adapters plates to fasten them to the cast
iron scutula.
Fitting adapters between the regulae and the bottom scutulas of
the rope bundles. Here you can see the new adapter plates temporarily
bolted in place.
We've finally started welding together the rope bundles. Here Eric welds a
stanchion onto one of the 3/4" thick steel scutulas. Getting them to be
perpendicular was a bit of a challenge, as the next step required a perfect
fitting on a 6 inch by 10 inch area at the end of 6 feet.
Once the stanchions were welded to the steel scutula, we lifted that unit in
the air with Dave's engine crane. We had to get the stanchions to fit
perfectly onto the auriculae we built and bolted onto the cast iron
scutula.
Since it was impossible (with the tools we had on hand) to line up the
stanchions perfectly, we had to use a little persuasion to make them line
up as we deemed proper. Here Kevin measures as he and Dave contemplate
where the welds will go. You can see the car jack
spreading the two stanchions apart to better line up with the adapters
on our cast iron scutulas.
Huzzah! The rope bundles are complete! Dave and Kevin show off how they
can disguise themselves as a rope bundle. Our rope bundle will eventually
be about 11 inches in diameter, and almost 7 feet long.
Our rope arrived today! (10-25-2002). This is 1200 ft of 3/4" polypropylene
wrapped in the original shipping packaging.
The Thursday night before the chunk we started winding the
rope bundles. Here you can see that we used our pin holes to bolt the modiolii
onto the machine while we started winding. In addition, you can see the
small bits of chain welded to the end which we later used as hitching
points while winding the rope bundles.
Here Kevin is keeping tension on the existing winds of rope while Jeff sorts
out a tangle. The lines we wound in each rope bundle are 600ft long of 3/4 inch
thick polypropylene.
|