Hull Design: Difference between revisions
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*An aspect of naval engineering related to designing the hull | *An aspect of naval engineering related to designing the hull | ||
*Mainly how to optimize it's geometry for the desired characteristics (stability, speed, and manuverabiliy) | *Mainly how to optimize it's geometry for the desired characteristics (stability, speed, and manuverabiliy) | ||
*Stil in progress (Also non-expert written) | |||
=Planar Hull vs Displacement Hull vs Semi Displacement Hulls= | |||
*Planar is essentially flat, and planes over most of the water at target speed due to lift, thus reducing drag significantly (the extension of this is the hydrofoil) | |||
**These are limited by the square–cube law and thus there are no large planar hull ships | |||
*Displacement Hulls Push Through the Water, and tend to be thin near the bow so as to "slice" more effectively | |||
=In relation to small craft= | |||
*Plotting + math here related to the OS Kayak and other small stuff | |||
*Seems to be the more flat the hull is the easier it is to turn and to "get going" as well as max speed | |||
**This comes with the downside of less stability (ie ease of "tipping over" due to little resistance to roll), and it is harder to passively hold a direction (called "tracking" ? ) (after paddling it will not stay in that straight line) | |||
=Internal Links= | =Internal Links= | ||
*[[Open Source Kayak]] | *[[Open Source Kayak]] | ||
*[[Open Source Pontoon Calculations]] | |||
=External Links= | =External Links= | ||
*[https://en.wikipedia.org/wiki/Hull_(watercraft) The Wikipedia Page on | *[https://en.wikipedia.org/wiki/Hull_(watercraft) The Wikipedia Page on Watercraft Hulls] | ||
*[https://en.wikipedia.org/wiki/Ship_stability The Wikipedia Page on Ship Stability] | |||
*[https://en.wikipedia.org/wiki/Hull_speed The Wikipedia Page on Hull Speed] | |||
*[https://www.boaterexam.com/boating-resources/boat-hull-types-designs.aspx#:~:text=%22V%2Dshaped%22%20hulls%20are,flat%20or%20round%2Dbottomed%20boats. A General Page on the Concept] | *[https://www.boaterexam.com/boating-resources/boat-hull-types-designs.aspx#:~:text=%22V%2Dshaped%22%20hulls%20are,flat%20or%20round%2Dbottomed%20boats. A General Page on the Concept] | ||
*[http://www.sit-on-topkayaking.com/Articles/Instruction/HullDesign.htm "Kayak Design Terminology Defined" ] | *[http://www.sit-on-topkayaking.com/Articles/Instruction/HullDesign.htm "Kayak Design Terminology Defined" ] | ||
*[https://www.austinkayak.com/blog/2012/08/a-look-at-kayak-hull-designs/ "A Look At Kayak Hull Designs" ] | *[https://www.austinkayak.com/blog/2012/08/a-look-at-kayak-hull-designs/ "A Look At Kayak Hull Designs" ] | ||
*[http://www.canoesplus.com.au/contents/en-us/d2045761055_Kayak-design-Properties-from-Canoes-plus.html "Kayak design Properties" ] | *[http://www.canoesplus.com.au/contents/en-us/d2045761055_Kayak-design-Properties-from-Canoes-plus.html "Kayak design Properties" ] | ||
*[https://www.sailmagazine.com/multihulls/a-look-at-wave-piercing-bows-on-multihulls An article with a great chart on bow design] (standard vs inverted vs axe) | |||
*[https://mackroforum.proboards.com/thread/725/kayak-hull-speed-calculator A Spreadsheet Calculator for the Hull Speed of Kayaks] (stumbled upon this, is it even of use?) | |||
Latest revision as of 02:16, 3 August 2020
Basics
- An aspect of naval engineering related to designing the hull
- Mainly how to optimize it's geometry for the desired characteristics (stability, speed, and manuverabiliy)
- Stil in progress (Also non-expert written)
Planar Hull vs Displacement Hull vs Semi Displacement Hulls
- Planar is essentially flat, and planes over most of the water at target speed due to lift, thus reducing drag significantly (the extension of this is the hydrofoil)
- These are limited by the square–cube law and thus there are no large planar hull ships
- Displacement Hulls Push Through the Water, and tend to be thin near the bow so as to "slice" more effectively
In relation to small craft
- Plotting + math here related to the OS Kayak and other small stuff
- Seems to be the more flat the hull is the easier it is to turn and to "get going" as well as max speed
- This comes with the downside of less stability (ie ease of "tipping over" due to little resistance to roll), and it is harder to passively hold a direction (called "tracking" ? ) (after paddling it will not stay in that straight line)
Internal Links
External Links
- The Wikipedia Page on Watercraft Hulls
- The Wikipedia Page on Ship Stability
- The Wikipedia Page on Hull Speed
- A General Page on the Concept
- "Kayak Design Terminology Defined"
- "A Look At Kayak Hull Designs"
- "Kayak design Properties"
- An article with a great chart on bow design (standard vs inverted vs axe)
- A Spreadsheet Calculator for the Hull Speed of Kayaks (stumbled upon this, is it even of use?)