I am wanting to make a telescoping boom (bb) for the current recumbent I am building. I am using 1 1/2" EMT. I found that if you take some sch 40 1 1/4" pvc and slit it, and cut about a 1/16" out at the slit, it will squeeze into the EMT. Now I want to be able to somewhat tightly slide a bb with about 10" or so of tubing left on it, into the pvc. I may have to find some sch 80 1 1/4" pvc, seeing that the wall thickness will be greater, because the sch 40 still has a lot of space when trying to slide a bb tubing into it.
Does anyone else have any ideas of how to make a telescoping (adjustable) boom?