So after reading so much conflicting information about the performance of the 172 from people with a variety of backgrounds, I decided the best thing to do was compare it straight to the source. I started with climb performance as it was the quickest one to come up with a repeatable scenario. I do intended on doing other areas as time permits.
Configured the aircraft for 2550lbs and take off from CYTZ RWY 26. Set FD for Alt hold for 300’ MSL and HDG hold 262 degrees. After establishing trimmed flight at 300’ and 74KIAS, set altitude target for 15,000’, engaged FLC and applied full throttle. At 3000’ lean for max RPM and repeat every 1000’ thereafter. All values taken from SimVarWatcher.
I considered anything within a 5% margin of error to be a reasonable variance.
Overall the results fell somewhat where I expected, above 0C and below 5000’ Pressure Altitude the plane behaves more or less as expected. But once you go outside those parameters, things start to go off the rails so to speak. I’m no expert in FDE editing/creation so I can’t give a lot of insight into why this happens, but I thought being able to see it like this may help with some of these discussions.