page_title: 49er (dinghy)
section_title: Hull
hierarchical_section_title: 49er (dinghy) / Construction / Hull
caption_attribution_description: English: A heat of the 2012 Olympics men's 49er race, with the Polish boat in the foreground (Łukasz Przybytek and Paweł Kołodziński from Gdańsk).
context_page_description: The 49er and 49er FX is a two-handed skiff-type high-performance sailing dinghy. The two crew work on different roles with the helm making many tactical decisions, as well as steering, and the crew doing most of the sail control. Both of the crew are equipped with their own trapeze and sailing is done while cantilevered over the water to the fullest extent to balance against the sails.
  The 49er was designed by Julian Bethwaite and developed by a consortium consisting of Bethwaites, Performance Sailcraft Japan, Peter Johnston, and Ovington boats. The boat has been an Olympic class since it was selected by the International Sailing Federation to be the men's high performance double handed dinghy Sydney Summer Games of 2000. Its derivative featuring a re-designed rig, the 49er FX, was selected by World Sailing to be the women's high performance double-hander at the Rio Summer Olympics of 2016.
context_section_description: The hull is made of Epoxy GRP and foam sandwich laminate with carbon fibre in high load areas. It includes two solid wings, also called racks, that clip into the side to increase righting moment of the trapezing crew. Its length was fixed at 4.99 metres because the ISAF brief for the high performance Olympic class dinghy called for a 5-metre boat, but Tokao Otani, a member of the development consortium, pointed out that there was a tariff in Japan for boats over 5 metres long. It has a fine entry to efficiently transition between the low speed displacement, and high speed planing modes. According to the International 49er class rules, the minimum hull weight including all permanent fittings can not be less than 94.0 kg.
caption: 49er at the 2012 London Olympic Games
exif: {"Image Make": "Canon", "Image Model": "Canon EOS 500D", "Image Orientation": "Horizontal (normal)", "Image DateTime": "2012:08:03 15:08:45", "Image YCbCrPositioning": "Co-sited", "Image Copyright": "", "Image ExifOffset": "2236", "GPS GPSVersionID": "[2, 2, 0, 0]", "Image GPSInfo": "12344", "Image XPAuthor": "[0, 0]", "Image Padding": "[]", "EXIF ExposureTime": "1/250", "EXIF FNumber": "8", "EXIF ExposureProgram": "Shutter Priority", "EXIF ISOSpeedRatings": "200", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2012:08:03 15:08:45", "EXIF DateTimeDigitized": "2012:08:03 15:08:45", "EXIF ComponentsConfiguration": "YCbCr", "EXIF ShutterSpeedValue": "8", "EXIF ApertureValue": "6", "EXIF ExposureBiasValue": "0", "EXIF MeteringMode": "Pattern", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "300", "EXIF SubSecTime": "16", "EXIF SubSecTimeOriginal": "16", "EXIF SubSecTimeDigitized": "16", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "3456", "EXIF ExifImageLength": "2304", "EXIF FocalPlaneXResolution": "576000/149", "EXIF FocalPlaneYResolution": "2304000/593", "EXIF FocalPlaneResolutionUnit": "2", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard", "EXIF Padding": "[]", "EXIF OffsetSchema": "4168"}