generale84 156 Posted March 7, 2020 Share Posted March 7, 2020 Hi during all my descent the PFD request to extend Speed Brake to mantain speed. That the real way how 330 working? It's so suspicious Link to comment Share on other sites More sharing options...
Deputy Sheriffs mopperle 4162 Posted March 7, 2020 Deputy Sheriffs Share Posted March 7, 2020 Yes, depends on various factors, e.g. when you have strong tailwind. Link to comment Share on other sites More sharing options...
DaveCT2003 2553 Posted March 7, 2020 Share Posted March 7, 2020 Otto is absolutely correct. If the aircraft gets high on the computed descent path, the speed will increase towards the upper limit of the speed range. If this increase in speed does not allow a descent constraint to be achieved, a message "EXTEND SPEEDBRAKES" is displayed on the PFD and MCDU scratchpad. A path intercept point which assumes half speedbrake extension, will be displayed on the ND descent track. When regaining the descent profile, retract the speedbrakes to prevent the A/THR applying thrust against speedbrakes. If the speedbrakes are not retracted, the "SPD BRK" message on the ECAM memo becomes amber and "RETRACT SPEEDBRAKES" is displayed on the PFD. Please login to display this image. If the aircraft gets low on the computed descent path, the speed will decrease towards the lower limit of the speed range. When the lower speed limit is reached, the A/THR reverts to SPEED/MACH mode and applies thrust to maintain the descent path at this lower speed. A similar path intercept point will be displayed on the ND.The computed descent path remains unchanged if speed is selected. As the selected speed may differ from the speed used for the pre-computed descent path and the speed variation around target no longer applies, the aircraft may deviate from the descent path. I hope this is helpful to you. Best wishes! Link to comment Share on other sites More sharing options...
Goshob 23 Posted March 7, 2020 Share Posted March 7, 2020 6 hours ago, generale84 said: Hi during all my descent the PFD request to extend Speed Brake to mantain speed. That the real way how 330 working? It's so suspicious Hi, Please note that the aerodynamics of this AC are much better simulated compared to A320. My personal advice to all colleagues is please start the Descent CL about 10 nm before TD. Ask the ATC for a descend approval, if you are flying online or using such programs like PATCX. Please observe the particular path needed for the STAR and mainly the applicable constrains. You can always adjust the VS when the AC is above FL100 and adjust it to the necessary altitude and speed. The RL pilots are always advising such, but please always keep in mind that passengers are human and have internal years, which should not be damaged. Happy landings! Link to comment Share on other sites More sharing options...
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