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747 problems - Printable Version +- FsPassengers Forums (http://www.fspassengers.com/forum) +-- Forum: FsPassengers (http://www.fspassengers.com/forum/forumdisplay.php?fid=3) +--- Forum: FsPassengers General (http://www.fspassengers.com/forum/forumdisplay.php?fid=4) +--- Thread: 747 problems (/showthread.php?tid=1053) |
747 problems - ronny - 19-09-2005 I have a few problems with the 747 and wondered if anyone else can fly the damn thing ![]() The first is the fact the default plane stalls on ILS with full flaps and using auto throttle keeping the plane at 150kts which I think is the landing speed. Second is take off, I take off the 747 with 3 clicks of flaps and almost everytime the plane rips the flaps off, I have tried taking off using less than 90% full throttle, but the plane is too fast and as soon as you lift off, the plane is doing in excess of 250kts, even if you take off with only 50% throttle which is way too unrealistic it still lfies too fast and you then stall it just off the ground, and you cannot get out of stall in a 747 in fs2004, even at 40k feet, any suggestions, I have managed to take off once, using auto throttle to keep the speed down. Plane is default 747 and meljet BA version. Another question about fsp, is there a turorial about buying new planes? I just got back off hols and first thing I did was buy FSP, it really is a great mod for fs2004 :P Thanks Ronny Here is the last flight analysis if it helps anyone ![]() Flight HX069 End of flight report Date September 18 2005 Flight ID: HX069 Pilot: xxxxxx (RIP) Company: World Travel Aircraft: Boeing 747-400 British Airways Union Flag Flight Date: September 18 2005 Departure: 08h12 (06h13 GMT) Arrival: -- From: LFPG - Charles De Gaulle - France To: ---- Nbr of Passengers: 321 Accident Report: The aircraft crashed at 07h43 hitting ground at 181 kt with a vert. speed of -11479 ft/m. According to the black-box we deduce the following: The flaps were extended at excessive airspeed and were damaged. This was probably the root cause of the crash. No emergency was declared before the crash. Casualties: -321 passengers aboard -321 killed -0 injured -Pilot and flight crew were killed Report: Flight Distance: 184 Nm Landing Speed: -- Time Airborne: 00h29:12 Landing Touchdown: -- Flight Time (block): 00h30:10 Landing Pitch: -- Time On Ground: 00h01:44 Landing Weight: -- Average Speed: 379.81 kt Total Fuel Used: 21428 lbs Max. Altitude: FL 200 Fuel Not Used: 154599 lbs Climb Time: 00h10:39 Climb Fuel Used: 10565 lbs Cruise Time: 00h10:01 Cruise Fuel Used: 7245 lbs Average Cruise Speed: 539.60 kt (M0.81) Cruise fuel/hour: 43399 lbs (calc) Descent Time: 00h08:32 Descent Fuel Used: 3617 lbs Re: 747 problems - olseric - 19-09-2005 I'll do what I can, but someone who knows the aircraft better than I may be able to answer better than I... Quote:The first is the fact the default plane stalls on ILS with full flaps and using auto throttle keeping the plane at 150kts which I think is Okay, the first thing you need to know is that landing speed is not a constant. It is a variable that is based upon several factors but the most influential is aircraft weight. Now, if your 150 kts is what you calculated as a Vref, great! Thing is, that 150 should be what you're at passing the threshold...not 8nm out. Also, check your weight to be sure you're not over the max landing weight. That would be another reason for a stall out. In the 747, 180 kts for ILS intercept is probably a good speed...you should most likely have around 10 deg of flaps at this point. Just before intercepting the GS (it begins to move down), lower the gear and start slowing down...if you do this right, you should be adding flaps incrementally along the way and simultaneously slowing down. Quote:Second is take off, I take off the 747 with 3 clicks of flaps and almost everytime the plane rips the flaps off, I have tried taking off If you are exceeding 250 kts before you are airborne, I am convinced that you are way too heavy. Check your payload and make sure that you do not have the aircraft overloaded. With a full load, the 747-400 should still have a V2 speed somewhere between 180-190 kts. Once airborne, that thing should maintain 250 kts climbing out at roughly 4000 fpm. For practice purposes, empty the plane out except for 25% fuel evenly distributed between the two wing tanks. Once you get the hang of it there, then you can start boosting your payload and your fuel load for longer ranges. With that weight, just guessing here, your Vr should probably be in the range of 160 kias, V2 around 170 kias. Re: 747 problems - ronny - 19-09-2005 Hmm, thanks for the reply, give it a try, load up with the same settings as me, fuel passengers etc and try taking off, COG is just below centre if you load the front full. I have tried and tried but cannot get it off the ground properly, I will give it another go tonight, also why if you stall a 747 at hight can you not get out of it, even if you nose down at 40,000ft it will not come out of the stall, btw I have had loads of perfect flights in fully laden 737 including the pdmg 737 800. Re: 747 problems - olseric - 19-09-2005 Quote:why if you stall a 747 at hight can you not get out of it, even if you nose down at 40,000ft it will not come out of the stall My guess is you were too heavy for that altitude. It will come out of it, but it's not easy...you need to sacrifice altitude for airspeed...and at a controlled rate. ![]() possibly put you into a spin. Re: 747 problems - ronny - 19-09-2005 Try it olseric, see if you can stop a 747 stalling ![]() Re: 747 problems - jboweruk - 19-09-2005 Trick in FS is to catch the stall before it happens, when the stall warning goes off that's when to correct, not when the bird stalls as they do seem pretty non-recoverable in FS default airliners. Re: 747 problems - olseric - 20-09-2005 Quote:see if you can stop a 747 stalling Well, I did have one stall out on climbout which I successfully recovered (that happened at about 5000 ft, I lost 4000 in the recovery). I will try it with the default and report back...what altitude do you want me to start at? |