Image icon  Sacrificial dagger board plate in a Topper boat.

Use this resource: Use this resource icon
Link to this page:
View at:        
Resource type: Image
Description: This is a photograph showing sacrificial dagger board plate attached to base of hull, which provides failsafe protection for the hull against grounding forces. The redesigned hull incorporated several features which enhanced its ease of assembly, performance and integrity: grounding forces will only damage the plate and cracks cannot propagate into the hull itself.
The Topper is a one-design boat sailed mostly in the British Isles. The Topper was originally designed with a glass reinforced plastic (GRP) hull, however, it was later decided that the Topper should be constructed with injection moulding, using polypropylene, which makes it a relatively light but durable boat. Following this change from the GRP to plastic hull sales of the Topper soared.
Keywords: Topper boat • glass reinforced plastic • GRP • polypropylene • hull • deck • lightweight • grounding forces • dinghy • design • composite • image
Categories: Materials > Polymers & elastomers
Materials > Polymers & elastomers > Plastics
Materials > Polymers & elastomers > Plastics > Thermoplastics > Polypropylene (PP)
Applications > Sports & leisure
Other topics > Design
Created by: The Open University
Mike Levers, The Open University
Published by: The Open University
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
Creative Commons Attribution Non-Commercial Share Alike logo
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
  • noncommercial – You may not use this work for commercial purposes.
  • share alike – If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.
View the full legal code here.
Date created: 09 March 1998
Date added: 15 December 2010
Resource ID: 3300