Keel – Navalapp

<img width="640" height="333" src="https://cdn.navalapp.com/uploads/2023/06/keel_bolts_article_v4_no_logo-1024x533.jpg" class="attachment-large size-large wp-post-image" alt="" decoding="async" sizes="(max-width:768px) 768px, (max-width:1024px) 1024px, 1024px" fetchpriority="high" srcset="https://cdn.navalapp.com/uploads/2023/06/keel_bolts_article_v4_no_logo-1024x533.jpg 1024w, https://cdn.navalapp.com/uploads/2023/06/keel_bolts_article_v4_no_logo-300x156.jpg 300w, https://cdn.navalapp.com/uploads/2023/06/keel_bolts_article_v4_no_logo-768x400.jpg 768w, https://cdn.navalapp.com/uploads/2023/06/keel_bolts_article_v4_no_logo-1536x800.jpg 1536w, https://cdn.navalapp.com/uploads/2023/06/keel_bolts_article_v4_no_logo-1080x563.jpg 1080w, https://cdn.navalapp.com/uploads/2023/06/keel_bolts_article_v4_no_logo-624x325.jpg 624w, https://cdn.navalapp.com/uploads/2023/06/keel_bolts_article_v4_no_logo-600x313.jpg 600w, https://cdn.navalapp.com/uploads/2023/06/keel_bolts_article_v4_no_logo.jpg 1920w" />

ISO 12215-9: Determination of bolt diameters of bolted ballast keels

<img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' class='avatar avatar-80 photo' height='80' width='80' />

Topics: Boat / Yacht | Hull | Keel | Pablo Sopelana | Pro | Scantling | Structure

<img width="640" height="348" src="https://cdn.navalapp.com/uploads/2022/12/seaworthiness-1024x557.jpg" class="attachment-large size-large wp-post-image" alt="Sailing yacht on a dead run with a mainsail and a symmetric spinnaker" decoding="async" sizes="(max-width:768px) 768px, (max-width:1024px) 1024px, 1024px" srcset="https://cdn.navalapp.com/uploads/2022/12/seaworthiness-1024x557.jpg 1024w, https://cdn.navalapp.com/uploads/2022/12/seaworthiness-300x163.jpg 300w, https://cdn.navalapp.com/uploads/2022/12/seaworthiness-768x418.jpg 768w, https://cdn.navalapp.com/uploads/2022/12/seaworthiness-1080x588.jpg 1080w, https://cdn.navalapp.com/uploads/2022/12/seaworthiness-624x340.jpg 624w, https://cdn.navalapp.com/uploads/2022/12/seaworthiness-600x327.jpg 600w, https://cdn.navalapp.com/uploads/2022/12/seaworthiness.jpg 1240w" />

Sailing yacht on a dead run with a mainsail and a symmetric spinnaker

Seaworthiness: rolling motion in waves

<img alt='' src='https://navalapp.com/snp-wp-content/uploads/avatars/820/61e9e912547a8-bpthumb.jpg' srcset='https://navalapp.com/snp-wp-content/uploads/avatars/820/61e9e912547a8-bpthumb.jpg 2x' class='avatar avatar-80 photo' height='80' width='80' />

Pablo Eleazar Merino Alonso

Topics: Boat / Yacht | Design | Hull | Keel | Pablo Merino | Rudder | Waves

<img width="640" height="320" src="https://cdn.navalapp.com/uploads/2020/10/Keel_underwater_view-1024x512.jpeg" class="attachment-large size-large wp-post-image" alt="Blue sailing boat on the sea with keel under water" decoding="async" sizes="(max-width:768px) 768px, (max-width:1024px) 1024px, 1024px" srcset="https://cdn.navalapp.com/uploads/2020/10/Keel_underwater_view-1024x512.jpeg 1024w, https://cdn.navalapp.com/uploads/2020/10/Keel_underwater_view-600x300.jpeg 600w, https://cdn.navalapp.com/uploads/2020/10/Keel_underwater_view-300x150.jpeg 300w, https://cdn.navalapp.com/uploads/2020/10/Keel_underwater_view-768x384.jpeg 768w, https://cdn.navalapp.com/uploads/2020/10/Keel_underwater_view-1536x768.jpeg 1536w, https://cdn.navalapp.com/uploads/2020/10/Keel_underwater_view-1080x540.jpeg 1080w, https://cdn.navalapp.com/uploads/2020/10/Keel_underwater_view-624x312.jpeg 624w, https://cdn.navalapp.com/uploads/2020/10/Keel_underwater_view.jpeg 2048w" />

Blue sailing boat on the sea with keel under water

On bulbs (and keels)

<img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' class='avatar avatar-80 photo' height='80' width='80' />

Topics: Advanced | Appendages | Bulbs | Design | Hydrodynamics | Keel | Lift-induced drag | Pablo Sopelana | Resistance | Stability

<img width="640" height="320" src="https://cdn.navalapp.com/uploads/2020/12/fin_keel_rudder_header-1024x512.jpeg" class="attachment-large size-large wp-post-image" alt="" decoding="async" sizes="(max-width:768px) 768px, (max-width:1024px) 1024px, 1024px" srcset="https://cdn.navalapp.com/uploads/2020/12/fin_keel_rudder_header-1024x512.jpeg 1024w, https://cdn.navalapp.com/uploads/2020/12/fin_keel_rudder_header-600x300.jpeg 600w, https://cdn.navalapp.com/uploads/2020/12/fin_keel_rudder_header-300x150.jpeg 300w, https://cdn.navalapp.com/uploads/2020/12/fin_keel_rudder_header-768x384.jpeg 768w, https://cdn.navalapp.com/uploads/2020/12/fin_keel_rudder_header-1536x768.jpeg 1536w, https://cdn.navalapp.com/uploads/2020/12/fin_keel_rudder_header-1080x540.jpeg 1080w, https://cdn.navalapp.com/uploads/2020/12/fin_keel_rudder_header-624x312.jpeg 624w, https://cdn.navalapp.com/uploads/2020/12/fin_keel_rudder_header.jpeg 2048w" />

Hull appendages, planforms, and wing sections: what are they?

<img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' class='avatar avatar-80 photo' height='80' width='80' />

Topics: Appendages | Geometry | Keel | Pablo Sopelana | Rudder

<img width="640" height="399" src="https://cdn.navalapp.com/uploads/2020/10/Schooner_USA-1024x638.jpeg" class="attachment-large size-large wp-post-image" alt="Schooner sails over the ocean waves in the bay near a harbor." decoding="async" sizes="(max-width:768px) 768px, (max-width:1024px) 1024px, 1024px" srcset="https://cdn.navalapp.com/uploads/2020/10/Schooner_USA-1024x638.jpeg 1024w, https://cdn.navalapp.com/uploads/2020/10/Schooner_USA-600x374.jpeg 600w, https://cdn.navalapp.com/uploads/2020/10/Schooner_USA-300x187.jpeg 300w, https://cdn.navalapp.com/uploads/2020/10/Schooner_USA-768x478.jpeg 768w, https://cdn.navalapp.com/uploads/2020/10/Schooner_USA-1536x957.jpeg 1536w, https://cdn.navalapp.com/uploads/2020/10/Schooner_USA-400x250.jpeg 400w, https://cdn.navalapp.com/uploads/2020/10/Schooner_USA-1080x673.jpeg 1080w, https://cdn.navalapp.com/uploads/2020/10/Schooner_USA-624x389.jpeg 624w, https://cdn.navalapp.com/uploads/2020/10/Schooner_USA.jpeg 2047w" />

Schooner sails over the ocean waves in the bay near a harbor.

The evolution of hull and keel forms – Part 2

<img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' class='avatar avatar-80 photo' height='80' width='80' />

Topics: Appendages | Geometry | History | Hull | Keel | Pablo Sopelana | Pro

<img width="640" height="398" src="https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter-1024x637.jpeg" class="attachment-large size-large wp-post-image" alt="Classic pilot cutter sailing" decoding="async" sizes="(max-width:768px) 768px, (max-width:1024px) 1024px, 1024px" srcset="https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter-1024x637.jpeg 1024w, https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter-600x373.jpeg 600w, https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter-300x187.jpeg 300w, https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter-768x478.jpeg 768w, https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter-1536x956.jpeg 1536w, https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter-400x250.jpeg 400w, https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter-1080x672.jpeg 1080w, https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter-624x388.jpeg 624w, https://cdn.navalapp.com/uploads/2020/09/classic-pilot-cutter.jpeg 2048w" />

Classic pilot cutter sailing

The evolution of hull and keel forms – Part 1

<img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' data-srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' height='80' width='80' data-src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' class='avatar avatar-80 photo lazyload' src='data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==' /><noscript><img alt='' src='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg' srcset='https://navalapp.com/snp-wp-content/uploads/avatars/78/645e5dfdf1a99-bpthumb.jpg 2x' class='avatar avatar-80 photo' height='80' width='80' />

Topics: Appendages | Geometry | History | Hull | Keel | Pablo Sopelana | Pro