Wing keel for  Irwin 23 modified
Milton Thrasher

Milton Thrasher: Wing keel for Irwin 23 modified

The plywood wing keel prototype has been moved back 8" to improve the balance by moving the Center of Lateral Resistance (CLR) aft and still have enough excessive area left so that it can be cut away as needed to achieve as perfect a balanced helm as possible. The 4" x 4" piece on the bottom was reshaped to reduce resistance while keeping the same lateral area.

Posted by: Milton Thrasher - website:

Milton Thrasher, Jun 15, 2004