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No pushback.... (Read 1312 times)
May 3rd, 2012 at 10:48am

Zaphod   Offline
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...with Thomas Ruth's excellant DC10? The tug approaches the nose wheel and seems to engage and then disconnects and wonders back to it's stand.
Any ideas?

Zaphod Wink
 

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Reply #1 - May 3rd, 2012 at 5:03pm

dave3cu   Offline
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Zaphod,

I haven't had any problems using pushback tug with the DC-10.

However, I can replicate your problem (with any aircraft) by holding the P too long  while holding Shift down. Due to key-repeating this causes multiple start-stop commands. If, when you release the keys, it ends on a stop command the tug animation continues to hookup but then retreats because of the stop command.

So don't hold the P too long...    Wink 
...just tap it.

Dave  Smiley
 
 

At that time [1909] the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.          Igor Sikorsky

I intend to live forever....so far, so good.         Steven Wright

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Reply #2 - May 4th, 2012 at 4:28am

Zaphod   Offline
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Hi Dave.
The plot thickens! Only two of the variants of the DC10 appear to have the push back problem. The KC10 and the Condor. All the others push back normally.
I'll have a look at the aircraft.cfg to see if I can spot anything obvious but to be honest I'm not sure what I'm looking for.

Zaphod Wink
 

What doesn't kill you makes you stronger. But why take the risk?
Intel i7 950 3.06Ghz (8mb Cache)
MSI X58 Pro-E MoBo
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Reply #3 - May 4th, 2012 at 4:41am

Zaphod   Offline
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OK, it seems the two offending variants have an extra line in the "contact points" section. Line 3

point.3 = 1, -12.3114,  0.00,  -12.38, 1500, 2, 2.51,  0, 0.590, 2.849, 0.74,  9.1, 10.1,   3, 180, 250 //AUX Gear

Not sure what to do with this info Roll Eyes

Zaphod.
 

What doesn't kill you makes you stronger. But why take the risk?
Intel i7 950 3.06Ghz (8mb Cache)
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Reply #4 - May 4th, 2012 at 4:49am

Zaphod   Offline
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Well, I //'d that line out and the KC10 now pushes back OK. Not sure what else may be affected but I'll report back if anything untoward occurs.

Zaphod Wink
 

What doesn't kill you makes you stronger. But why take the risk?
Intel i7 950 3.06Ghz (8mb Cache)
MSI X58 Pro-E MoBo
MSI GeForce N480GTX 1536 MB GPU
Corsair MXS£ DDR 3 (3*2GB) RAM
Corsair professional HX750W PU
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Samsung 23" SyncMaster SA550
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Reply #5 - May 4th, 2012 at 9:28am

dave3cu   Offline
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Zaphod,

Good find. Did some experimenting and this is my guess...

The tug animation needs to figure out where the nose gear is, based on the contact points, and looks for the gear located on the center line (lateral 0.00). As the Aux is also on center line (0.00), the sim apparently becomes confused and terminates the pushback routine.

I changed the lateral location to 0.01, to put it slightly off center, and pushback is ok. As far as I can tell the only advantage to this method, rather than //'ing the line, is it preserves the visual effects (touchdown, taxi) for the gear.

Dave   Smiley
 

At that time [1909] the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.          Igor Sikorsky

I intend to live forever....so far, so good.         Steven Wright

You know....you can just rip up a to-do list.
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Reply #6 - May 4th, 2012 at 11:22am

Zaphod   Offline
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Nice one Dave.
I have applied your fix and it works just great.
Seems neater than my attempt.

Cheers.

Zaphod (Paul) Wink
 

What doesn't kill you makes you stronger. But why take the risk?
Intel i7 950 3.06Ghz (8mb Cache)
MSI X58 Pro-E MoBo
MSI GeForce N480GTX 1536 MB GPU
Corsair MXS£ DDR 3 (3*2GB) RAM
Corsair professional HX750W PU
Samsung HD103SJ Sata HD (1TB)
Samsung 23" SyncMaster SA550
Windows 7 64 bit home
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