I would like Alex T to comment here please. I have watched a few videos of the 767 on line with PW engines and I have noticed that at CRZ (FL360 @ M.80) that the N1 readings are 88%. On a second video I watched, also PW engines, the N1 was 86%. Now I know this depends on weight etc, but the CS 767 always displays a value of 79 - 80 % N1. The EPR values appear to be correct though. It sounds like Alex is a real 767 driver, so I would appreciate his response as well as from CS.

Hello!

I’m not a 76 driver, I drive a different aircraft but looking at my company’s charts we don’t have anything about N1 that I can see. Only EPR, sorry!

Engine speed values at cruise are a tricky one as it can depend not only on cruise FL but also on what the winds are doing and what kind of payload the plane is dealing with.

For example, my experience on an A321 flying from YVR-YYC, which is 1 hour 30 gate to gate, the engines don't have to ever work as hard as they have when I have done YYZ-YYC, which is a much longer flight at nearly 4 hours gate to gate if YYZ ground crew gets their act together.

Engine speed values at cruise are a tricky one as it can depend not only on cruise FL but also on what the winds are doing and what kind of payload the plane is dealing with and even possibly how fast they are cruising.

For example, my experience on an A321 flying from YVR-YYC, which is 1 hour 30 gate to gate, the engines don't have to ever work as hard as they have when I have done YYZ-YYC, which is a much longer flight at nearly 4 hours gate to gate if YYZ ground crew gets their act together.