Here are some pdf files to download –
Simple 1 Page Rigging Guide
Basic Rigging Guide – 5 pages
Optimist Rigging Guide – 3 pages
Optimist Rigging Guide – 9 pages
Parts of the Optimist diagram
Below is a table which has suitable sail and mast rake combinations according to weight. These may vary slightly depending on the conditions and skipper’s skill level but will serve as a good starting point:
Sailor Weight (Kgs) – Mast Rake (metres)
Less Than 40kg – 2.79m
40-45kg – 2.80 – 2.83m
45-50kg – 2.83 – 2.84m
More than 50kg – 2.84 – 2.85m
In +20 knots, rake aft 2cm for all weights.
Remember this is only a guide and all mast lengths vary slightly which will affect your rake. Also make sure your mast is a firm fit in the collar and there is no sideways movement so energy is lost, fore and aft movement is good because it helps rake the mast the correct way to improve performance.
Once you have found a rake you like mark the mast step so you can repeat the setting and also check to see it has not moved. Some of the good sailors have two rake settings a heavy and a light setting which I think is a great idea because of the increased mainsheet tension you need to run in the breeze.