WA in early 1970. This being the first time Perth had hosted a World Series. The title was won by Jennifer Julian sailed by Russell Bowler and Peter Walker. Runner up was Jazzer from Sydney sailed by Jamie Wilmot. His sister Jeanine Wilmot (Vayu) won the women's title. Ken Beashel built, rigged and tuned Jazzer. Jazzer had to win the final heat to win the title. The Cadet and Junior titles were won by Jamie Wilmot from Shadrack sailed by Michael Nash from Sydney. Shadrack was designed and built by Dave Fraser. RESULTS: INAUGURAL WORLD CHERUB TITLE PERTH 1970 - Jennifer Julian 1809 (Russell Bowler, Peter Walker. WA(NZ) 8007 points, 1; Jazzer 1629 (Jamie Wilmot, Tony Barnes. NSW) 7433 pts, 2; Ace III 1815 (Gordon Lucas, Phil Arnold. WA) 6576 pts, 3; Shadrack 1631 (Michael Nash, Michael Oram. NSW) 6438 pts, 4. The Cadet and Junior World Titles: 1st Jazzer 1629, 2nd Shadrack 1631. Design The Cherub is Bermuda-rigged with trapeze(s), and has a crew of two. The Cherub has been through a number of changes. In the 1950s the designs had considerable keel rocker. The most popular design from this era was Spencer's Mk7 built in plywood but by 1971 most successful designs had much less rocker and flatter sections aft to promote planing. Considerable care was needed to achieve the 110 lbs hull weight. In 1970 the small jib was enlarged to an overlapping genoa about 8 square feet bigger. By the late 1960s new boats were being built with aluminium masts which were lighter and stiffer. Up to 1980 boats were generally built from 3 and 4 mm plywood but after this some were made from foam sandwich construction pioneered by Russell Bowler in New Zealand. Some Cherubs did dual service in New Zealand sailing in the Q class (unrestricted 12 ft). The Cherub hull was used with a short bowsprit, a taller mast and much larger sail area with both the crew and skipper using trapezes. Current Cherubs use an asymmetric spinnaker system but earlier boats used relatively large double luff spinnakers and used a notably long (9 foot) spinnaker pole. Cherubs have a high power-to-weight ratio and are very quick downwind in stronger breezes but can be slow upwind in lighter airs compared to longer boats. The class differs in detail specification between the Northern and Southern Hemispheres. The Northern boats, often referred to as