Wednesday, October 30, 2013

Frame number 2

All parts have been bonded and assembled. I learned a lot, most important is that I really needed to keep to the mind set that I am not welding. The internship and apprenticeship I did was on steel this has aspects of steel but it is still composites. I realized this as i started frame number two. Fraim two is a bit more complex and yet simplified. I was frustrated by the somewhat inconsistent diameter of the bamboo but i still loved its strength so for frame number two i made a cored/ mandrel wound tube made working with it made a huge difference. The satays are made from split bamboo that was bonded, and then shaped again giving me uniform parts. The one inch parts can still be made from bamboo the one inch seams to be both uniform and relatively free from splitting.




 The short bamboo tube I made for what is the modified seat tube was bamboo and was made quite uniform when i sanded it with 120 grit paper on my orbital sander. When mitered it fit quite snug and i attached it with Bob Smith Industries cyanoacrylate glue. This stuff is supper strong and versatile. Back when I was working at Valio our prototype people used it make all sorts of parts for like small cams and gears and they worked as well as production molded parts

Other brands exist but after trying them all this one is the  one that does the trick, Krazy Glue brand is good in a pinch but it leaves bubbles which reduces the strength as air has no strength.