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mast sections

Posted: August 28th, 2007, 12:46 am
by SC20 808
Hi!

Would appreciate some info on the different mast setups and sections used in the history of the SC20 to the ARC 22 today.



- was the 10m mast and the 12m TR mast using the same mast profile or was the section for the TR different?

- the TR was using double spreaders. Have there ever been a 12 m aluminum mast with single spreaders? Was it using the same section (profile) as the TR?

- What was the weight of the TR mast and what is the weight saving of the carbon fibre masts?

Appreciating your answers!

Thanks

Dirk

Posted: August 28th, 2007, 12:31 pm
by Matt Haberman
Dirk,

The mast profile has remained the same over the years. The only change to the extrusion that I am aware of relates to the internal profile of the sail track, this occured in the early 90's if I am not mistaken.

The mast section on both the 33' and 38' 6" mast is the same, but the rigging is quite different. The 33' mast has always been a single spreader rig. The 38' 6" mast started out on the 20TR as a triple spreader rig. When the ARC-22 was introduced we moved away from the triple spreader and utilized a single spreader design with multiple diamond wires, we continue to use this rig today.

Off hand I don't know the weight savings of the carbon mast over the aluminum, but Tom might have that information available.