Simviation Forums

When I taxi my Project Opensky 744 (any variety), the aircraft does not respond to my control inputs (I use rudder pedals) until three seconds after I move my feet, and continues to turn for three seconds (give or take) after I let the controls come to center. I'm almost positive that this isn't a problem with my pedals as I've only had this problem with the 744. Does this occur in real 744s? If so, is this a common problem? What can I do to fix it?

Its the sort of thing I would expect from any turbine/turbo-prop/jet driven aircraft.
Turbine lag response to controls.

Most adjustments have to be performed well in advance, and the effect continues well after.

Paul.... ...!

What are your system specs? Are your frames really low?

BlackAce wrote:What are your system specs? Are your frames really low?

I am not sure if this is a frame rate problem?
I use rudder peddles as well and have not noticed this with the B747's I have granted they do not turn on a dime but then I would not expect them to. I generally use a little brake as well as rudder this seems to help out and I start my turns early and finish them early as well. It takes some getting use to.
Not sure if this will help but you could have either a contact problem or something to do with the MOI settings. If you have a B747 that does not have this problem try comparing the aircraft cfg files of the two aircraft. But remember before changing anything BACKUP your files first.

Just out of interest... ....

Its very rare that I use large passenger jets in the Sim, but I wondered, do you just rely on differential braking to perform turns, or a combination of differential braking plus variable thrust from opposite-side engines?

Paul...Venus and Saturn are in opposition....probably... ...!

Fozzer wrote:Paul...Venus and Saturn are in opposition....probably... ...!

The Libra MUST be in between

I'm absolutely positive that this is not an FPS problem; I have the same problem at 40FPS as I have at 10 (DAMN YOU HEATHROW!). Fozzer, I've never had that problem with any other passenger aircraft (777, A380, etc.) and in my experience, airliners only use differential thrust when making VERY tight turns. Garymbuska, I will look into the MOI problem, as I didn't have my yaw problem with the default 744.

UPDATE: I have the same problem with the Opensky 744F, LCF, and 748i.

Russell Irwin wrote:UPDATE: I have the same problem with the Opensky 744F, LCF, and 748i.

I would check out the contact points if you look below one of the points deal with turning radius. I suggest you compare the bad aircraft contact points with a good one of the same design B747-200 with a B747-200. The wheels have a 1 for a class there should be three lines with a 1 nose wheel and two main wheels. Remember that some B747 have a main wheel that turns as well make sure it has a turn angle assigned to it.
Typical contact point for a wheel
point.0= 1, -18.0, 0, -3.35, 3200, 0, 0.50,180, 0.25, 2.5, 0.90, 1.0,4.0, 0, 0, 200
In the above case the turn radius is 180. this wheel is the nose wheel the first number -18.0 tells you that is is negative 18 feet form datum
A main gear would normally have a 0 as they do not turn left or right.

[contact_points]

//0 Class <0=none,1=wheel, 2=scrape, 3=float>
//1 Longitudinal Position (feet)
//2 Lateral Position (feet)
//3 Vertical Position (feet)
//4 Impact Damage Threshold (Feet Per Minute)
//5 Brake Map (0=None, 1=Left, 2=Right)
//6 Wheel Radius (feet)
//7 Steer Angle (degrees)
//8 Static Compression (feet) (0 if rigid)
//9 Max/Static Compression Ratio
//10 Damping Ratio (0=Undamped, 1=Critically Damped)
//11 Extension Time (seconds)
//12 Retraction Time (seconds)
//13 Sound Type
//14 Airspeed limit for retraction (KIAS)
//15 Airspeed that gear gets damage at (KIAS)