Hi! This is my first post.
Some months ago I found a site for appropriate technology for third world development and there are 2 of the thousands of bulletins available, that deal with blacksmithing and blowers. A double action inner tube bellows by Inversin, and an oil drum forge with single action inner tube bellows and the construction of a centrifugal blower in the same bulletin; they are in this address (just checked and they are still there). http://www.cd3wd.com/CD3WD_40/CD3WD/index.htm
Ok, now I