ORIGINAL: oldvet70

The Tach is a crutch? Thats a crock! The tach, like any tool, has to be used properly and its ability to provide useful information must be understood to be of value. I guess full size aircraft and race cars use them as a crutch also. The Tach, if used by a knowledgeable person, is a valuable tool. It does nothing by its self. Only the operator can interpret what it says and the value of that information. If you don't know how to use it then it's not even a crutch it's more of a rock.