Also known as FIV or cat AIDS, feline immunodeficiency virus is an infectious disease caused by a retrovirus belonging to the lentivirus family. It is in the same family as the feline leukemia virus (FeLV), and is similar to the HIV virus in humans. FIV infects both domesticated cats, lions, tigers, pumas and cheetahs.
This map only incorporates the wide-open throttle condition, but adding a third independent axis of throttle position can create a 3D performance map; it is noted that throttling directly affects efficiency via an inverse proportion, and maximum efficiency and minimum BSFC is realized at 100% throttle.
Depending on wind & circumstances and size of the vessel there can be hundreds even thousands of pounds of pressure on the sail and the line, so winches are an important tool for the sailor. Grinding (and tailing) is the act of rotating the winch handle to pull on the line inorder to tighten a sail. On larger sailing vessels, the crew operating the winch is often referred to as the Grinder. Because the winch wonât pull a line tight unless the line is tight on the winch, both grinding and tailing actions need to occur simultaneously. On the American Cup vessels (for example) while one person can do both actions, It takes two - or one person for each action when speed and every second counts.