BIRTHA - Pneumatic RV antenna mast
BIRTHA - Pneumatic RV antenna mast
Start with a telescopic pruning saw, painting/cleaning handle, or pool handle. Add one collapsible garden hose inside, and attach it at both ends. Fill the garden hose with air (or water) pressure to extend the "mast". Release the air pressure to retract it. No seals to leak, so no holding pins needed. It worked for about 5 months, then the ...
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