pdgetrf

Thank you all for reply and kind explanation. Looks like THR is the solution to the scenario where I don't have a flight plan to use like in the case of flying traffic pattern to practice touch and go. I gave the manual another read and it's explained as the following:THR Switch: If current mode is FLCH,SPD, VNAV SPD, VNAV PTH, VNAV ALT orTO/GA, pressing the THR switch changesthe thrust limit to the CLB thrust setting.This setting will be displayed on the PrimaryEICAS. This does not affect the autothrottlemode, but changes the thrust limit allowed.Thrust Reduction: ... ... This will occur automatically if VNAV and the autothrottle are engaged.Now pieces start to fall together for the case of manual (no VNAV, therefore no automatic thrust reduction) takeoff:(1) Flap acceleration height set in TAKEOFF REF page, say 1000 feet (2) At takeoff, follow the FD clue to pitch for climb and maintain V2 (or V2+10). At 500’ AGL, VNAV is going to activate and take over pitch commands to the flight director (according to the type rating course lesson 2), and manage climb and acceleration from now until level off. So if VNAV is not even armed, at flap acceleration height pitch does NOT come down for speed up.(3a) If VNAV is armed (requiring a flight plan, or at least a few waypoints in the LEG page) when reaching this height, VNAV takes over the control and lower the pitch to start flaps retraction by speeding up, and when flaps 5 is reached, thrust change from THR REF to CLB setting and higher speed is set automatically (up to 250 as set in the VNAV page of FMC). Now and after, FLCH can be used for further climb and level-off(3b) If VNAV is NOT armed, at flap acceleration height, either press THR to bail out of TO/GA mode into CLB mode, manually set a higher speed in MCP IAS/Mach window (up to 250) and lower the pitch according to FD (which reacts to the new lower thrust setting and higher speed in window) to speed up and retract flaps, or use FLCH which picks the best thrust setting for climb and uses the speed selected in MCP IAS/Mach window.The difference between 3a (automatic) and 3b (manual) is that in 3a, speed up at flaps retraction height starts with THR REF setting while in 3b it's in a lower setting: CLB or the one picked by FLCH. This is under the assumption that the plane is flied solely as indicated by FD.

Thanks for the headsup and reply. And no I don't have many experience flying these high-end add-on. That's why I'm asking.

HiI use default FMC setup for takeoff and noticed that if there is no route or no waypoint in LEGS (sometimes I don't have any waypoints when I practice touch-go in traffic pattern over an airport), VNAV cannot be armed (VNAV textgoes white and then disappears on PFD) either on the ground or after airborne, and through out the climb after flaps 5 VNAV is not taking over to lower the angle for speed up, and it's stuck in TO mode. I understand that VNAV is the vertical profile of the flight plan and therefore , no plan, no profile (right?). The flaps 5 setting is in TAKEOFF REF and seems to have nothing to do with vertical profile. What's the logic in this? Also, from the FMC VNAV page 1, I can't find anything related to the flight plan, then why doesn't matter if there is a flight plan or not to use VNAV for takeoff?Thanks!