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I had made a paper one of these in a art class I took in college. I had saw it last week and decided to make one out out of wood. It is a fun, though briefly frustrating project.
By the way the wood is walnut.
Thanks for looking.
Aug 25, 2012
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152 posts in 1662 days
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#1 posted 08-25-2012 09:14 PM
How ever did you figure out the cuts on this? I am very impressed. It is a lot of fun and quite attractive. I would not mind having one of these for the top of my Christmas tree.
-- Kay - Just a girl who loves wood.
110 posts in 1453 days
#2 posted 08-25-2012 09:43 PM
That is amazing, thank you for sharing, and I am glad you took the shadow picture, that is really nice.
-- "Anyone who has never made a mistake has never tried anything new." - Albert Einstein
#3 posted 08-25-2012 10:35 PM
Thanks Kay. Its just a little math from those geometry/trig days! I used the law of cosines…I know its has probably been a while! It involves taking a slice of a single tetrahedral, and giving a length to each side (say 1, which in a 30-60-90 makes the other side the square root of 3 over 2.
Yada Yada Yada…Long story short… the angle between the faces is 70.5 degrees. So if you cut the rods with a (70.5)(54.75)(54.75) and you miter with 60 degree angles.
All the rods should look like this before glue up.
#4 posted 08-25-2012 10:38 PM
Murdock- Thank you, I found that it was hard to see the design by just looking at the wood.
11 posts in 1094 days
#5 posted 08-25-2012 11:37 PM
I like it alot!!! And wow the law of cosines seems like ages ago!!!! Good Job!
2 posts in 1093 days
#6 posted 08-25-2012 11:42 PM
I agree with Murdock… and sasquatcher!!!
So how did you do the finishing on a project like this! Seems very very tedious!!
#7 posted 08-25-2012 11:52 PM
Thanks all!! I actually did all of the sanding and most of the finishing before assembling. After assembly I think I put 3 more coats knocking it back with 300 grit in between.
54 posts in 2384 days
#8 posted 08-26-2012 01:42 AM
-- Live to Learn
2195 posts in 2078 days
#9 posted 08-26-2012 02:15 AM
Very nice! A skeletal version of a stellated icosahedron!
Ref: http://mathworld.wolfram.com/IcosahedronStellations.html #17
I take it you built the tetrahedrons, intertwining the pieces as you went?
#10 posted 08-26-2012 03:48 AM
Very intuitive AtomJack. I hadn’t seen that link before, maybe I’ll have to step up my game and make a real complex one. And you were spot on, I built the original tetrahedral, then would build one-by-one, locking them together as I went.
2313 posts in 2071 days
#11 posted 08-26-2012 06:20 AM
Man I hate math…........
2341 posts in 1995 days
#12 posted 08-26-2012 09:46 AM
-- Dreaming patterns
751 posts in 2267 days
#13 posted 08-26-2012 11:10 AM
One of the most intriguing wood projects I’ve seen. Fascinating.
-- Art | Bradenton, Florida
2341 posts in 1895 days
#14 posted 08-26-2012 03:14 PM
That looks like the way my picture frames turn out that aren’t supposed to look like that…
-- Randy "You are judged as much by the questions you ask as the answers you give..."
13644 posts in 2074 days
#15 posted 08-26-2012 04:36 PM
That is really cool!
AtomJack, I like to use math to get me where I want to go but those shapes blow me away!! As do the formulas!!.............Jim
-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!
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