My Dumb Projects
Thursday, December 10, 2009
  Buso Renkin: Sunlight Heart Lance
I was commissioned to build Kazuki's weapon from the anime Buso Renkin. I did a 3D model to work out dimensions and proportions.



The shaft was too thin to embed a steel core so I started with 3/4" maple for strength and rigidity.



The grip widens near the head so I needed to lathe wood that would merge with the shaft. I cut a channel for a temporary maple shaft in two pieces of bass wood, bolted them together.



The assembly was shaped on the lathe and then the pieces were removed to be glued to the final shaft.



I used a Dremel sander to shape the transition to the square shaft.



I used the same method to turn the three rings and then attached it to the shaft.



The final shaft grip.



I inserted a threaded rod into the end of the shaft to hold the tail parts. The arrowhead was cut from a solid piece of maple, the ball is a wooden drawer handle and the part under it was turned from dowel.



The arrowhead inserts were made from scraps of maple. The tail spike couldn't be glued to the shaft until these pieces were in place.



Before I attached it, I cut the details and panel lines into the arrowhead.



I cut the tail details from thin styrene.



The recessed areas on the lance head were made from styrene. I used Pepakura to work out the geometry.



I cut the profile of the head from a thick sheet of styrene. I cut a channel for the shaft to fit into.



I then used styrene to lock a flattened area of the shaft into place. The shaft will be removable for shipping.



I cut the recess polygons from 1/4" MDF and used styrene to make the diamond details.



After the polygons were made, it became obvious that the recesses were too deep. I re-made both sides to the proper depth.



I attached both sides to the profile.



I glued styrene side panels to the head.



I filled the interior with expanding foam to support the geometry while keeping it light.



I started shaping the foam at the back.



I covered the exposed foam with Bondo.



More Bondo to form the tip.



The thickness of the plastic threw off the Pepakura pattern so I got some distortion and misaligned edges. I was able to correct these flaws with more Bondo.



The head so far.



After looking at the reference material, I discovered that the tip need a knife edge rather than the point I had. I added Bondo to build up some thickness and then sanded a proper knife edge.



A quick primer coat shows the nearly completed head.



After all the minor seams and flaws were filled, I painted the head with a base coat of silver.



I masked and painted the color areas of the head.



I cut the zig-zag detail from thick styrene and glued them into the recesses.



For some reason the polygons at the other end no longer fit after the orange areas were glued in. I would have to remove 1/8" from each edge to make them fit properly.



The final assembled lance. It is over 5 feet long.



It ships disassembled and will be glued together by the client.



Detail of the finished tail spike.

 
These are all the dumb things I find myself obsessed with building when I SHOULD be doing something more productive.

As a kid I built lots of plastic model kits, never knowing that one day those skills would actually be of use.

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Location: Phoenix, Arizona, United States
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