|Project by Jim Jakosh||posted 06-30-2011 01:59 AM||4695 views||22 times favorited||16 comments|
I have been reading about how to make a pleasing looking project by having the right proportions and the Fibonacci gauge lets you make that 1:1.618 ratio without calculating . I guess I didn’t quite know the specifics about building one even after reading all the notes on line. I made the first one( last picture) and it came out to a 1.53 ratio. So I decided to draw it out first and see what were the critical dimensions. I finally figured it out and took a picture of my drawing. Once you decide on the major arm lengths, you have to space the ones at that ratio of 1 to 1.618 and then it works perfect. I used a little algebra in doing so.
Here is what I deduced: For an 8” arm you need 8” =X +1.618X or 8=2.618X Then X=3.055 which is the distance between the holes. That is what you drill the 4 hole patterns. Then for the short arm, which is parallel to the left arm, I made the tip in line with the other 2 tips and the ratio worked out at all widths up to 14”
I made it out of walnut scraps from a current project and finished it with semi gloss Deft. I had some dead time waiting for glue to dry. I used 3/16 pop rivets and stopped before the head broke off and locked the parts together. I cut off the pin and knocked it out of the rivet. To prevent chafing of the finish, I used 4- 1/2” dia. plastic washers made from the side of a milk jug
-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!