Post by Alex T on Jul 26th, 2020 at 3:26pm
400kts wrote on Jul 26th, 2020 at 2:40pm:
| Hi Alex, once more thank for the help, I have managed to complete two flights, one using TO and one D-TO with 31 assumed temp and in both the cases it went well and according to what TOPCAT has foreseen (not easy to say that the remaining runway was exactly the one predicted but I was definitely not on the other threshold) so for these two cases no issues at all, I can also say the rest of the flight was smooth and without any issue (I use it coupled with MCE) so pretty happy with it! For the D-TO 1 or 2 try to use the saved file I have attached to my previous conversation, if you will experience my same issue you will you will not be able to lift off before the opposite threshold, also when accelerating the feel is something is missing, just to see if is something on my system or not in the end... Thanks again! |
I found your problem: First: did you realize in the saved flight files you posted, you're not doing a TO1, you're doing a D-TO? And yes! They are different things. Like I said, it's impossible to do a hard derate plus an assumed temp, it's either one or the other.
In this pic, it would look like you're doing a D-TO1 + 40* right? Actually no, the fact that the "1" next to D-TO is white, signifies that it is armed for the CLB thrust only, and not active:
This picture I removed the TO1 and you can still see the same EPR?
Make sure on TOPCAT on the aircraft editor you uncheck the option for "Allow combination of both"
I threw this flight situation and exact weight into TOPCAT and with flaps 15, this takeoff is over 5000lb overweight. Even bringing the weight down to the climb / field limited max, it's only possible to do it with full thrust!