While out for a Sunday cruise in my '65 GTO, I suddenly noticed a serious flutter in the original rally-gauge tachometer needle. That little yellow pointer, which has given so many years of unwavering ...

Pilots must diligently check aircraft Hobbs and tachometer readings against dispatch records, as these numbers are crucial for accurate billing, logging flight time, and complying with critical ...

Ever since the first race cars were built, it's been helpful for drivers to know their engine speed. It may sound obvious, but engine power is always a function of engine speed, so accurately knowing ...