Drawing of H23 Keel Clamp Mechanism Tagged: Retractable Keel This topic is empty. Viewing 1 post (of 1 total) Author Posts 15 November 2022 at 5:24 pm #737 [email protected]Keymaster Explanation of the Holiday 23 Keel Mechanism. Drawing provided by Dave Claxton. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In