February 1, 20179 yr Departure airport and runway given, thrust limits set, perf init set, flaps value 10, CG 21% set - still FMC do not calculate V speeds and trim value. What am i doing wrong ? Artur
February 1, 20179 yr make sure you have confirmed perf page Geoff Fleet Manager Chairman Noble Air VA
February 1, 20179 yr Departure airport and runway given, thrust limits set, perf init set, flaps value 10, CG 21% set - still FMC do not calculate V speeds and trim value.What am i doing wrong ? Are your ADIRUs (inertial navigation) aligned? Mike
February 1, 20179 yr 1) Check perf init... make sure data is inserted, complete and correct. 2) insert cg on takeoff ref... assuming CDU preflight is done correctly, you will get v speeds like everyone else 3) if all else fails, fly the tutorial. Brian Nellis
February 1, 20179 yr Commercial Member You also need a departure runway defined. I assume you have not seen V-SPEEDS UNAVAILABLE which means you are outside the envelope of the aircraft. ==================================== E M V Precision Manuals Development Group ====================================
February 1, 20179 yr I assume you have not seen V-SPEEDS UNAVAILABLE which means you are outside the envelope of the aircraft. ^^If you select a derate and is too heavliy loaded v-speeds will be unavailable
February 1, 20179 yr Also, make sure you hit the LSK 1L next to Gross Weight in the Performance page. This happened to me last night. Since I'm used to flying the NGX, I tried to go and enter a ZFW. On the queen however, the ZFW is already pre-populated. Instead you have to verify the Gross Weight indication by pressing LSK 1L. After doing this, the V-speeds appeared. Robert Schumacher My PC: EVGA GTX 1080 FTW, i7 6700k OC'd to 4.6, ASUS Rog Maximus VIII Hero Mobo, 16GB DDR4 3200 RAM, 2 Intel 750 Series SSDs, Creative Sound Blaster Z.
February 1, 20179 yr Also, make sure you hit the LSK 1L next to Gross Weight in the Performance page. This happened to me last night. Since I'm used to flying the NGX, I tried to go and enter a ZFW. On the queen however, the ZFW is already pre-populated. Instead you have to verify the Gross Weight indication by pressing LSK 1L. After doing this, the V-speeds appeared. I had the OP's problem and this fixed it for me. Recommend check this
February 2, 20179 yr And I think that varies by aircraft/operator configuration? Tonight I flew the United -400 and I had to confirm the GW value, I'm pretty sure I didn't have to do that in the Cathay Cargo -400F last night. Dave Current System (Running at 4k): ASUS ROG STRIX X670E-F, Ryzen 7800X3D, RTX 5090, 55" Samsung Q80T, 64GB DDR5 6000 RAM, EVGA CLC 280mm AIO Cooler, Brunner CLS-E NG Yoke, Thrustmaster Warthog HOTAS & Stick, Thrustmaster TCA Quadrant & Add-on, VirtualFly Ruddo+, TQ6+ and Yoko+, GoFlight MCP-PRO and EFIS, Skalarki FCU and MCDU
February 2, 20179 yr Gross weight may be too high for flaps 10 take-off. Set flaps 20 and v-speeds will be calculated. Bert Timmerman
June 19, 20178 yr Had the same problem, KORDATC was spot on, thanks mate. Paul Findlayson Paul Findlayson
June 19, 20178 yr Commercial Member Yeah, this is one that catches people out on a number of occasions. Don't pencil-whip your pre-flight. Go through your normal procedure, but make sure you're paying enough attention to the info being shown to you. The GW will have a < next to it, meaning that it needs to be confirmed. Slow down, don't rush. Be one with the airplane. Kyle Rodgers
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