Image icon  Sacrificial dagger board plate in a Topper boat.

 
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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: Mike Levers, The Open University
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).
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Date created: 09 March 1998
Date added: 15 December 2010
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Resource ID: 3300