Crab claws on ice
03 February 2017 Editor 6 Comments
A report by Peter Adrian from Sweden on his crab claw rigged iceboat:
Am sailing my second season my modified iceboat: an Isabella Classic with 5m2 (54 sq. ft.) crab claw sail. Just a win-win over all compared against the same boats with conventional Bermuda rig. Just one thing I’ve noticed is she no longer lifts the windward runner at over 60km/h (37 mph).
The yard is made fast to the apex of a bipod mast and fixed to the hull at the bow, so it cannot move. Like the traditional oceanic rig, only the boom is free to sheet in and out. Iceboats are sailed close-hauled at all times, and tack downwind, so the narrow sheeting range between the bipod is no problem.
The sail is cut dead flat, so it is the simplest of rigs for the home builder. Another advantage is the iceboat can be parked in its box more or less completely rigged. Pull the sack off the spars/sail, lift the yard and clip it to the bipod mast. Install the runners and the sled is ready to go in 5-6 minutes, while the Bermudas are still still fighting to get their stuff ready in 20-30 minutes, and even longer if minus 5C.
Peter’s Isabelle Classic fleet: The G-Flyers
Peter also sails a Viking ship. Really.