Here's how I unstick a 2pc mast without using an automobile, post, jackhammer,
hair dryer, car jack, or a bunch of strong friends:
I basically make a pair of strap wrenches (see below), and attach one to each
piece of mast, as close to the joint as possible, but not over the ferrule.
I twist them in opposite directions, and once I twist hard enough, the joint
unsticks and rotates. Once I break the stick by twisting, it is usually easy
to pull the pieces apart while continuing to twist.
A strap wrench allows you to grip the mast very tightly without damaging it,
as you would if you used a big set of vise-grips. They are sold commercially,
some oil-filter wrenches are strap wrenches, but they can be easily put together
using windsurfing equipment.
Take a board tie-down strap and tightly wrap it around the mast (at least ~5
times) - important things are that it's tight, and previous layers are
underneath later layers - this way, as you pull on the strap, it not only tries
to twist the mast, but also tries to tighten the grip on the mast. To get extra
leverage, wrap the free end around a mast extension, boom extension, second
mast, etc. If the mast/strap interface is too slick, it will still slip, so I
use an extra trick to prevent this: I wrap the closed cell neoprene sleeves I
cut off my wetsuit around the mast before I wrap the strap on.
When attaching the second strap wrench, make sure it tightens when twisted in
the opposite direction.
This has worked at least half a dozen times with masts way too stuck for even
four people to untwist. It is easier with two people, but I've done it
This technique has not failed me yet, but if it ever does, I'd rather call
it a one-piece mast than try something that might damage the mast or myself.
Mistral Energy, Hi-Tech 8'6", and WindWings
P.S. A while ago, I had posted, asking for help regarding breaking downhauls
and mast extensions. Following the net's advice, I got a solid-looking Chinook
extension, and a Chinook grommet pulley that have been holding up very well.
I highly recommend the Chinook pulleys - they don't cost you any "gap" and make
it easier to downhaul your sails (easier => less stress on equipment => less
breakage). In fact, I haven't broken anything since I got it.