Telescoping 27 foot mast
You are dead right – you need the special hinged spanner that came with every mast kit to tighten up the locking nut, otherwise sections may well collapse downwards. In may years of using these masts on exercises and with proper training, I never had a collapse.
Sent: Wednesday, October 3, 2018 1:11 AM
Subject: Re: [wireless-set-no19] Hello #intro
I owned a few in the past - I would echo Chris's comment about descending unexpectedly and trapping fingers. I think the kit originally included a kind of spanner that fits over the pin that projects from each collar - if you dont have one its worth fabricating one ! Later masts (the Racal aluminium alloy ones with lever operated clamps) even if not pump-up were really well sealed so the time taken for the air inside to escape slowed the descent to a safer rate.
73 de G0OZS