Section 2 to 2-2.2
Revised June 1973

2-1 Sail Plan and General Dimensions


The STANDARD KEEL is designed for maximum performance and is recommended for competition. With this keel the boat has the lowest possible center of gravity and minimum form drag. Maximum stability is also obtained with the least amount of weight.

The SHOAL DRAFT KEEL offers the minimum draft which is necessary for cruising in many areas. A slight bit of weight has been added to compensate for the higher center of gravity and thus gives the boat approximately the same stability as the standard keel model.

After careful analysis and in-the-water testing, we have determined that the shoal draft boat's performance is superior to that of a centerboard. It is also less expensive, has no mechanical complications, eliminates the leaking and rattling of the board, while still offering a good answer to the shallow draft need.


In order that you are completely familiar with the method by which our modern fin keel is attached to the hull, please refer to the "Keel Installation Diagram", STD-17-14030, further along in this section of the manual. The entire keel is first sandblasted to produce a clean surface which will give maximum paint adhesion. An epoxy filler is applied where needed and let dry. A coat of epoxy rust proofing paint is then applied to the dry, clean metal and epoxy filler surfaces, except for the top and sides of the flange. This area is left bare so that the epoxy adhesive will properly bond to the keel and hull. A high tensile strength epoxy adhesive is now applied to the top of the keel and the hull is set down directly on this area. The keel bolts are wrapped with caulking cotton and "Nauti-calk" is applied to the bolts on the inside of the hull. The nuts are then tightened down with a 16" lever so your keel is really on to stay! The excess epoxy that flows out around this joint is used to fair the keel to the hull.

After the keel has been attached to the hull any nicks are repaired with epoxy filler and a second coat of epoxy paint is applied to the entire keel. Eight hours of drying time is allowed before finishing with two coats of a T.B.T.F. bottom paint, as outlined in Section 8 of this manual.

Only a high quality T.B.T.F. type bottom paint such as International Tri-Lux should be used for subsequent refinishing of your boat's keel and bottom. Copper base paints are incompatible with iron or steel keels and the original, factory applied, T.B.T.F. (Tri-Butyl Tin Fluoride) vinyl base paint. The reaction of dissimilar metals, even in paints, will cause electrolysis and/or rusting unless the metals are close together on the electrolytic scale. Since tin and steel or iron are close together the continued use of T.B.T.F. paint is recommended.

2-2.2 Keel Installation


Next Section
Back to Table of Contents
Back to the Columbia 26 Mk2 Menu
This page last modified November 15, 1999