Frederiksen (Ronstan) Mainsail Car System

Morgan’s Cloud’s mainsail is big at 600sqft and has full length battens. The Frederiksen (now Ronstan) system is reliable and smooth running. It makes the main substantially easier to hoist and even more importantly makes it easy to get it down in a hurry. However, the biggest payoff is that we can easily reef and unreef without turning up into the wind. Much safer, and you don’t get wet!

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Meet the Author


John was born and brought up in Bermuda and started sailing as a child, racing locally and offshore before turning to cruising. He has sailed over 100,000 miles, most of it on his McCurdy & Rhodes 56, Morgan's Cloud, including eight ocean races to Bermuda, culminating in winning his class twice in the Newport Bermuda Race. He has skippered a series of voyages in the North Atlantic, the majority of which have been to the high latitudes. John has been helping others go voyaging by sharing his experience for twenty years, first in yachting magazines and, for the last 12 years, as co-editor/publisher of AAC.

5 comments… add one
  • Tom Davison Nov 26, 2015, 12:07 am

    What do you think about the the Tides marine sail track system?


    • John Nov 26, 2015, 8:38 am

      Hi Tom,

      I don’t have any first hand experience, but I hear good things. What size is your boat?

    • Andreas Dec 17, 2015, 8:58 am

      Hi Tom,
      Have you made any decisions about the Tides Marine Sail Track system?
      I’m also looking at it, because I need to renew my sail wardrobe and this looks like it is an attractive alternative to both the Harken and Antal systems.

  • Ronnie Ricca Aug 28, 2017, 5:28 pm

    Your Ronstan cars on MC, are they the ball bearing, captive ball or ballslide system? I’m in between one of these systems or the Harken captive ball system. I know you like your system, so I wanted to get the details on it so I know which is which.

    Hope you’re enjoying your cruising,

    • John Aug 28, 2017, 6:07 pm

      Hi Ronnie,

      They are old Fredricson ball bearing cars. I guess they are not captive in that it you take one off you need a loader, which we carry.

      I don’t have first hand experience with their cars, but generally anything from Harken works well.

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