This one falls into the category where I'm not SURE it's wrong, but it feels off.

During the climb, I selected INS nav, VNAV for pitch, and engaged the autopilot. I then selected TM mode for the autothrottle, and it began a very rapid climb and increased the EPR to nearly .798 even though the EPR card suggested the climb should be in the .585 range intially. That seems VERY aggressive, and even exceeds the takeoff thrust EPR of .642 for the flight.

Does that seem right?

No it isn't. The whole take off and climb phase is incorrect - I have raised the issue and apparently they are working on it. This plane was a slow climber like the 747-100/200.

Edited 3 hours ago3 hr by Trevor

As of 1.0.5, Using TM+VNAV in climb will target either the OPT or MAX EPR values shown on the PMS CLB page depending on whether your current weight and TAT fall within the OPT range. If its within, it will use OPT power settings, else it will go for MAX values until back in OPT range. The fallback to MAX EPR is a failsafe to avoid users getting stuck in a very slow climb outside of OPT table parameters.

So from the example below, it will target either .573 (OPT) or .630 (MAX) EPR depending on whether within OPT CLB parameters, and will automatically alternate between the two depending on atmospheric conditions and weights.

For initial climb out, manually manage throttles (coupled with VS Mode if using autopilot) until you are in clean configuration before engaging TM+VNAV. If you want you can manually manage throttles per OPT values all the way to TOC to experience the slower climb rates that it will do at those OPT EPR values specifically.