The plane has these two counters on the left side of the pilot. One is called Engine 1 Quartz and the other Engine 2 Quartz. What are these used for?  Thank you.

Logs the engine hours like a Hobbs meter. In real life you have to know how many hours are logged on each engine for TBO, in twins depending on how the engine start sequence is they should have almost the same, but those aircraft where the number one engine is always started first then it will have more hours logged than engine two.

Edited June 30, 20196 yr by MartinRex007

Thanks. Do these work in P3D v4.5 and RealAir's Turbine Duke v2?  Are the numbers automatically incremented like a car's odometer or are these manually manipulated or adjusted by the pilot?

50 minutes ago, oneleg said:

Thanks. Do these work in P3D v4.5 and RealAir's Turbine Duke v2?  Are the numbers automatically incremented like a car's odometer or are these manually manipulated or adjusted by the pilot?

They are like a cars odometer. 

A Hobbs meter is specifically to record when the engine is running, you might have 2,000 hours on the airframe and 2,050 on the engines. They are usually activated by oil pressure sensors, or electrical system. It all happens automatically, that is why most FBO's rent planes based on the Hobbs reading, it's the hours logged on the engines that the FAA requires for inspection, annuals etc.

Edited June 30, 20196 yr by MartinRex007

The Hobbs meter is a major problem with rented planes, because some 'pilots' tend to cut short (or even omit) the engine run up, warm up etc. because they have to pay for time they aren't even flying.

Unfortunately this leads to (un)expected engine problems/failures.

Edited July 1, 20196 yr by FDEdev