[TowerTalk] Question about Mast Yield Strength

[Eric Rosenberg]

2 questions:

1. The results of I get from using the MARC software package tells me I 
can use a 2" OD pipe and/or tubing with a wall thickness of .120...and 
then lists a variety of mast material.  Does the yield strength (listed 
as 35000 for 6061-T6) change if the mast wall thickness is greater than 
.120, say .250?

2. One material mentioned is 7075-T6.  Where is that material available 
and at what price? The 'local' distributor, Dillsburg Aeroplane Works, 
doesn't carry it.

Thanks & 73,

Eric W3DQ
Washington, DC  


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