Corbin's Treehouse - Corbin Dunn, Santa Cruz, CA
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Archive for January, 2013

Roue Cyr performance coming up – WIE

I’ll be performing Roue Cyr pretty soon! A total of 8 shows over two weekends at the 418 Project in downtown Santa Cruz, California. The show is a fundraiser for the dance studio called “What is Erotic”. I’m doing a piece where I’m Tarzan in the jungle taming a wild wheel. Come check it out, and buy tickets! Ken Adelman and Portia did the photo above for their flyer. My head is under the “is”.

Coffee Cup Stirling Engine

Over winter break I started on a project I’ve been wanting to do for a long time. A coffee cup stirling engine, made from scratch based on plans from Jan Ridders. It “almost works”. The bearings seem to be too big, and the shaft has a lot of slop. I had machined the shaft to the side I thought the bearings were going to be (3mm), but they are larger! I need to remake that part and see if it works. Some work in progress shots. Power piston (graphite), cylinder (brass), crank shaft (steel), flywheel (alum), stand (alum in brass).... [read more]

Corbin V-36 mod 2

I finally got some more metal and time to work on my V36 unicycle frame. I removed a triangle support that I had added to try to reduce flex, and brazed on another tube that goes up to the seat post tube. Here is the tube taped on before I brazed it: And after: This totally added the strength I needed to prevent flex from side to side. In the above picture you can see the disc brake mount I “fabricated” from a piece of steel. I stuck it on the brake, and takes it on with the MIG welder... [read more]

Corbin V-36

I’m working on a V-Frame 36’er unicycle, called the “Corbin V-36“. It’s partially an experiment to see how light I can make it, yet still be strong and not flex. I did a 3d model in Sketchup, and printed it full size. I then machined a jig to hold things in place. Here’s a video explaining the jig: And some pictures. The jig setup for my my main seat post tube: Experimenting with bending: I’m using cro-moly tubing, 1/2″ OD by .049 wall thickness. It is too small of tubing, and the frame flexes when going up hills. I’m going... [read more]

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