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Showing results for tags 'to/ga'.
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I have finally been able to capture an unexpected issue with ATS disengagement quickly after pushing the throttles forward after engaging TO/GA mode on takeoff. What is not so easy to see as it occurs very quickly, is a second or two after pushing the throttles forward, the ATS LED's on either side of the button "blink" and simultaneously the ATS 2-line textual display goes blank, and then I'm back to manual throttle control. In this case I pushed the throttles full forward. Most of the time, pushing them full forward (with TO/GA engaged) works perfectly as ATS engages, stays engaged and the takeoff sequence is as expected /designed. I typically use a saved state (all of my states were created on a freshly created airframe with the latest release, 1.6.1 I believe). I then reset FMS, set up the flight plan, PERF INIT, PERF TAKEOFF (from which I SEND V speeds which are correctly displayed on the PFD). I have reproduced this behavior with TO/GA engaged either before or after sending the takeoff V speeds, no difference in behavior. So I don't think when I send V speeds impacts this issue with respect to when I push the TO/GA button before takeoff roll. I have tried a variety of things in order to isolate the cause, each time thinking that I figured it out and then it recurred. Things like the timing of when FD is turned off (relative to sending V speeds for example), and TO/GA not engaged until after the V speeds are loaded, and lined up on the runway (normal procedure). Other notes: - I usually load new FMS information into the CDU (flight plan, PERF INIT, PERF TAKEOFF) and SEND V speeds before engaging TO/GA. My comment on the video about having V speeds loaded with the saved state is not relevant for this reason, so disregard that part). - No, I am not accidentally pressing an ATS DISC button, it actually is one of the buttons on the back of the Honeycomb Bravo throttle quadrant. I do have Airbus throttles on the way as they have 2 ATS-disconnect buttons (one on each throttle), and I'll make the pilot side one TO/GA, but this is not relevant for this issue. Note (edit to the above on July 25): - I have evaluated whether pushing the throttles full forward (before ATS auto-engages) could be a cause or contributor to this behavior. I believe I have proven that this is not the case / not the cause. ATS engages (as a result of TO/GA armed) before the manual throttle push can exceed the N1 limit, as far as I can tell, which makes sense to me. - I changed my airport location from KDTW (where my pre-taxi state is saved) to KORD (and used the state, but without location). The first takeoff attempt had this issue occur. Made me wonder if using a saved state without location could be related to this issue. I'll have to see if I can reproduce that behavior or not. I do not think this consistently leads to the issue. Feedback on this would be highly valued! To see the detail in the video, click the Youtube settings and select the highest video quality.
