ag92
Posts: 1045
Joined: Wed Jul 26, 2006 5:23 pm

Flight Simulator (744) Problems

Sat Mar 22, 2008 5:19 pm

Hi guys,

I need some help over here, whenever I fly a 744 on FSX, around 30mins into it, the speed drops to zero and a virtual freefall happens. Whenever this happens it is on autopilot and i take it off immediately once it starts, and I try and turn off and on the engines again. It always starts to ascend for 5 seconds than once again starts its freefall.

Does anyone know what the problem is?

Thanks in advance
 
9VSIO
Posts: 653
Joined: Tue Dec 19, 2006 5:00 pm

RE: Flight Simulator (744) Problems

Sun Mar 23, 2008 5:32 am

Does this happen in all conditions? Are you flying S&L or climbing?
Me: (Lining up on final) I shall now select an aiming point. || Instructor: Well, I hope it's the runway...
 
acroairfun
Posts: 100
Joined: Sat Feb 24, 2007 4:56 pm

RE: Flight Simulator (744) Problems

Sun Mar 23, 2008 7:07 am

Well... I use FSX now, but when I used FS2002 about 5 years ago I had the same problem with default Boeing 777-300. I think Microsoft couldn't fix any problem since first FSs.  Angry  Big grin
Everything is flexible if you know how to bend it.
 
kimberlyRJ
Posts: 249
Joined: Thu Mar 06, 2008 7:35 am

RE: Flight Simulator (744) Problems

Sun Mar 23, 2008 3:48 pm

Hey

Could it be an icing problem? Ensure you have all the heating equipment on that you need!?

Is it the basic Boeing 747? or PMDG's version?

Kimberly.
 
ag92
Posts: 1045
Joined: Wed Jul 26, 2006 5:23 pm

RE: Flight Simulator (744) Problems

Sun Mar 23, 2008 4:11 pm



Quoting 9VSIO (Reply 1):
S&L or climbing?

Sorry didn't get you on what you mean

Quoting Kimberlyrj (Reply 3):
Could it be an icing problem? Ensure you have all the heating equipment on that you need!?

Should there be an icing problem associated with Singapore's hot and tropical climate?

Quoting Kimberlyrj (Reply 3):
Is it the basic Boeing 747? or PMDG's version?

No add-ons yet for me

Quoting 9VSIO (Reply 1):
Does this happen in all conditions

This reminded me, everytime I have flown a Boeing 747 is with the static weather update. I am now going to try it with the standard weather and then tell you the results
 
GCDEG
Posts: 317
Joined: Wed Jan 25, 2006 3:42 am

RE: Flight Simulator (744) Problems

Sun Mar 23, 2008 9:04 pm



Quoting Ag92 (Reply 4):
Quoting 9VSIO (Reply 1):
S&L or climbing?

Sorry didn't get you on what you mean

Straight and level flight or climbing.

Quoting Ag92 (Reply 4):
Could it be an icing problem? Ensure you have all the heating equipment on that you need!?

Should there be an icing problem associated with Singapore's hot and tropical climate?

I would think so at 35,000ft  Wink Make sure you have the anti ice, pitot heat etc when you need to.

Quoting Ag92 (Reply 4):
No add-ons yet for me

Two words - get some! It will add such a new dimension to your FS.

Quoting Ag92 (Reply 4):
This reminded me, everytime I have flown a Boeing 747 is with the static weather update. I am now going to try it with the standard weather and then tell you the results

Try it with just clear weather ie no clouds winds etc and see what happens.

GCDEG
The best thing invented - Winglets!
 
9VSIO
Posts: 653
Joined: Tue Dec 19, 2006 5:00 pm

RE: Flight Simulator (744) Problems

Mon Mar 24, 2008 1:18 am

Does the stall warner go off? Or does the speed just plummet. Most times, I think people set their climb on a fixed V/S and the a/c is unable to maintain such a rate at full weights, so the poor thing just stalls.
Me: (Lining up on final) I shall now select an aiming point. || Instructor: Well, I hope it's the runway...
 
ag92
Posts: 1045
Joined: Wed Jul 26, 2006 5:23 pm

RE: Flight Simulator (744) Problems

Fri Mar 28, 2008 3:52 pm



Quoting 9VSIO (Reply 6):
Does the stall warner go off?

I think it does

But anyways thanks alot for your help guys, when I put it on clear skies everything is ok.

Quoting 9VSIO (Reply 6):
I think people set their climb on a fixed V/S

I don't know much about this but I never go above 2500 on a 744. Most of the times its at 1800
 
David L
Posts: 8547
Joined: Tue May 18, 1999 2:26 am

RE: Flight Simulator (744) Problems

Fri Mar 28, 2008 5:02 pm



Quoting 9VSIO (Reply 6):
Most times, I think people set their climb on a fixed V/S and the a/c is unable to maintain such a rate at full weights, so the poor thing just stalls

 checkmark 

Quoting Ag92 (Reply 7):
I don't know much about this but I never go above 2500 on a 744. Most of the times its at 1800

Seems like quite a lot at altitude. Safest way is to climb in airspeed/Mach mode to the target altitude and let the V/S sort itself out. As you near your cruising flight level, you might only be able to climb at a few hundred feet per minute.
 
ebs757
Posts: 618
Joined: Sat Jul 29, 2006 11:45 pm

RE: Flight Simulator (744) Problems

Sat Mar 29, 2008 1:32 am



Quoting Ag92 (Reply 7):
don't know much about this but I never go above 2500 on a 744. Most of the times its at 1800

2500 FPM is a lot for a 747 at FL300
Viva la Vida
 
LUPOR1D
Posts: 31
Joined: Sat Feb 23, 2008 4:41 pm

RE: Flight Simulator (744) Problems

Sat Mar 29, 2008 3:24 pm

Make sure the pitot heat is turned on before you even take off.

Also use the level change function if the a/p has it
Always lurking.
 
ag92
Posts: 1045
Joined: Wed Jul 26, 2006 5:23 pm

RE: Flight Simulator (744) Problems

Sat Mar 29, 2008 5:34 pm



Quoting David L (Reply 8):
Seems like quite a lot at altitude



Quoting Ebs757 (Reply 9):
2500 FPM is a lot for a 747 at FL300

Ok guys, thanks alot again. I always thought that the average would be somewhere near 3000 considering how long it takes to reach cruising altitude!

Quoting LUPOR1D (Reply 10):
Make sure the pitot heat is turned on before you even take off.
Also use the level change function if the a/p has it

All right, now what is the heat you are talking about and the level change function? I apologize for my limited knowledge of FSX
 
David L
Posts: 8547
Joined: Tue May 18, 1999 2:26 am

RE: Flight Simulator (744) Problems

Sat Mar 29, 2008 7:41 pm

Using V/S mode is fine when you know what you're doing. That's why I never use it.  Smile

Quoting Ag92 (Reply 11):
All right, now what is the heat you are talking about and the level change function?

You might find the Pitot Heat in the default version of most aircraft but I don't think there's such a switch on the real 744, or on the PMDG version. There's Wing Anti-ice and Nacelle Anti-ice on the real aircraft, with switches on the overhead panel.

The Flight Level Change mode is a Boeing autopilot mode. If it's not available on the default version, I'd forget about it. It's been a while since I looked at the default aircrfat.  Smile
 
9VSIO
Posts: 653
Joined: Tue Dec 19, 2006 5:00 pm

RE: Flight Simulator (744) Problems

Mon Mar 31, 2008 5:38 am



Quoting David L (Reply 12):

The Flight Level Change mode is a Boeing autopilot mode. If it's not available on the default version, I'd forget about it. It's been a while since I looked at the default aircrfat

FL change is not avail on default 747. I always manually monitor and adjust the climbs and descents lest my speed goes a bit haywire...

Quoting Ag92 (Reply 11):
All right, now what is the heat you are talking about

I believe the default 747 has it labeled "anti-ice", but it must serve as a pitot heat as well. Make sure that is on.
Me: (Lining up on final) I shall now select an aiming point. || Instructor: Well, I hope it's the runway...
 
David L
Posts: 8547
Joined: Tue May 18, 1999 2:26 am

RE: Flight Simulator (744) Problems

Mon Mar 31, 2008 10:51 am



Quoting 9VSIO (Reply 13):
I always manually monitor and adjust the climbs and descents lest my speed goes a bit haywire...

That's good as long as you understand how climb performance deteriorates with altitude.

Incidentally, here's a good discussion about V/S in real operations:
V/S Autopilot (by Ballkn Feb 23 2008 in Tech Ops)

You'll have to sort the wheat from the chaff but it should be obvious.  duck 

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