Which of these poles would be straighter and stronger then the others?
These are some poles that are compacted making them possible to send to space. Sending a single solid pole .5km long will not be possible.
STEM ( Storable Tubular Extendible Member), a pre-stressed piece of thin metal that could be rolled up like a carpenters tape measure. On Alouette electric motors would roll out the thin pieces, which would form tubular semi-rigid antenna once they were deployed.
Each pole produced would have the same weight per measure.
What advantages and disadvantages does each pole made from these methods have?
Are there any other types of extendable poles I am missing that could be added to this list?