Hi last night i was in flight from kmia to kmsp an i took the flight with 66 % of fuel using the pmdg 737ngx aircraft. When i landed at the airport the fuel was about 19% of fuel . I don't really know if it was the joystick that cause my aircraft to bank to the right almost running out the runway or it was the fuel weight balance . Maybe one tanks was more full than the other . Can anyone tell me what this might be ? Because i don't think its the joystick because my joystick is find.

Doubt it is a fuel problem but think you need to tell us the percentage of fuel left in the left, right, and center tanks. I see this happening a lot with my 737 NGX and it's pulling to the left after landing. Things are well after turning off the AP.

 

Best regards,

Jim

Doubt it is a fuel problem but think you need to tell us the percentage of fuel left in the left, right, and center tanks. I see this happening a lot with my 737 NGX and it's pulling to the left after landing. Things are well after turning off the AP.

 

Best regards,

Jim

 

Yea it does that . An i think is not the joystick because if it was why am i taxing the runway with out banking to the right . So i think it was the fuel . I don't remember well what the % was on each tank . But all i know the total was 17% of fuel . I am on a flight now with full tanks its a 3 hour flight from KMSP to KSFO now when i land i will find out if the problem was the fuel or joystick . Because i won't be using the reserve fuel for landing like i did on last flight when my aircraft nearly run off to the side of the runway. The good thing is i score some how a perfect landing in FSpassenger no penalty at all.

Theoretically it should burn the centre tanks off first and then the wing tanks, so if there was a wing tank fuel imbalance, that could have been the cause, you'd have to check the quantities.

 

With both rubber bands turning, it should have burned off more or less equal fuel for each engine, but, Miami to Minneapolis, which I think is your route (not great on US ICAO codes) is about 1,500 miles if my geography is right (not great on US distances either LOL), so that's what, three hours flight time in an NG more or less, so, if you left the APU running for the entire flight (which you could, since the NG's APU will happily run at up to 41,000 feet), then you'd have burned approximately 1,100lbs of fuel with the APU with packs and all that crap running, and since the APU feeds from the number one tank (i.e. the left wing one) then that could have made you about half a ton heavier on the starboard side by the time you were landing. Which might possibly account for the phenomenon, depends as I say whether fuel was transfering to sort the balance out.

 

Al

Theoretically it should burn the centre tanks off first and then the wing tanks, so if there was a wing tank fuel imbalance, that could have been the cause, you'd have to check the quantities.

 

With both rubber bands turning, it should have burned off more or less equal fuel for each engine, but, Miami to Minneapolis, which I think is your route (not great on US ICAO codes) is about 1,500 miles if my geography is right (not great on US distances either LOL), so that's what, three hours flight time in an NG more or less, so, if you left the APU running for the entire flight (which you could, since the NG's APU will happily run at up to 41,000 feet), then you'd have burned approximately 1,100lbs of fuel with the APU with packs and all that crap running, and since the APU feeds from the number one tank (i.e. the left wing one) then that could have made you about half a ton heavier on the starboard side by the time you were landing. Which might possibly account for the phenomenon, depends as I say whether fuel was transfering to sort the balance out.

 

Al

 

Thanks chock a lot , now when i was about to land in KSFO (San Francisco ) i was coming from Minneapolis it was about 3 hour an 32 minutes flight . I had full tanks on this flight so when i was about to land i think the total fuel was about 50 % .The weather was fogy an windy an right when i was about to land like about 100FT the autopilot quits on me an disengage in an ILS landing. I quickly grab the joystick an try to get my aircraft back on the runway . I know the real thing to do was to pull up an climb to a safe altitude an try to land again . But my speed was like about 139 knots an Alt was 100Ft an descending so i might not have much time to pull up, my thought was that i might encounter a tail strike when trying to pull up at that speed an that altitude. So i landed on the side of the runway not on the runway not to great of landing but safe . But now i wonder what might have cause my autopilot to quit on me right when landing. Could it be the weather since it was fogy an windy mmm but it kind of strange because my autopilot handle this kind of weather before.

 

What do you think Chock ? Or anyone ?

Dunno what made your AP quit, if you had failures on and were very unlucky, that might do it. Anyway, the thing to do is hit TOGA (control+shift+G by default I think), which would basically firewall the throttles for you if the A/T was on. At 139 knots and 100 feet AGL it would almost certainly have got you out of there before touchdown, the 737 will float a long way when it gets in ground effect.

 

Al

Thanks Chock i manage to solve the problem . I think it was the weather or something that cause my AP to disengage . Also when you are in ils approach i was expecting to see VOR LOC on final approach but i didn't. I saw something else say LOC but no VOR, which was kind of wierd.

Fuel imbalance won't cause either of the two issues you had absent a very extreme situation -- at least not in the real world. I'm not at all familiar with this virtual aircraft, so I cannot speak on it. But, I find it hard to see how a fuel imbalance would cause an aircraft to pull sharply off the side of the runway gvien that when you're on the ground the landing gear should absorb any lateral imbalance. In terms of the autopilot automatically decoupling, in the real world that would happen only when the flight computer detected a weight and balance situation so out of balance that the autopilot doesn't have the flight control authority to maintain coordinated flight. In that sort of case, you'd experience a very difficult time flying the jet with the autopilot off.

 

I would believe something else is causing those two issues but to be honest it would be difficult to know what without being there. I am certain that the aircraft maker would be happy to assist you directly.

 

Cheers,

 

Ken

Fuel imbalance won't cause either of the two issues you had absent a very extreme situation -- at least not in the real world. I'm not at all familiar with this virtual aircraft, so I cannot speak on it. But, I find it hard to see how a fuel imbalance would cause an aircraft to pull sharply off the side of the runway gvien that when you're on the ground the landing gear should absorb any lateral imbalance. In terms of the autopilot automatically decoupling, in the real world that would happen only when the flight computer detected a weight and balance situation so out of balance that the autopilot doesn't have the flight control authority to maintain coordinated flight. In that sort of case, you'd experience a very difficult time flying the jet with the autopilot off.

 

I would believe something else is causing those two issues but to be honest it would be difficult to know what without being there. I am certain that the aircraft maker would be happy to assist you directly.

 

Cheers,

 

Ken

 

Thanks Ken . It was kind of strange when it happen to me but the strangest thing was that the next day i was watching aircrash Investigation an i saw this similar issue with a DC plane i think it was . That came in for landing an the aircraft skated of the runway making like 60 degrees turn skating threw the runway . The aircraft was coming into fast an the wheels quit on it . That was kind of similar to my issue the only thing no failures was detected during my approach. I do notice was coming in very dry on fuel not to dry but in my eyes 17% of total fuel is dry, because i have never landed with such a low amount of fuel. I think with that amount of fuel i would only have time for 2 miss approach or 1 go around since atc likes to send you far away from the airport as possible to try again to line up with the runway. I know in emergency type of situation like this one pilots have to react fast . But am no real pilot i was relax watching my speed an decent speed. When the problem happen if i have done what chock suggested i might have pull up in time . But then again the decent was coming in fast so pulling up might just hit the tail causing a tail strike an who knows what other damage . But thinking good about it now i could have just let the aircraft touch on its to back wheel with out added extra thrust an then perform what they called a touch an go an go around i would still run off the runway but i would have much time to pull up again an try again an avoid the tail strike situation. I think most pilot in real life would just like to get the aircraft on the ground an that is it but with out no emergency being said to the passenger it would be very dangerous because if they don't brace for impact lots will die . Because the worst thing is when something happens that you are not expecting to happen you feel unprepared an might not know what to do when it happens. But then again this is just FSX no big worries for passenger lol