Take off roll issue

[Bob Marton 39]

Quick Update

1. I lined up onto runway 27 at KMIA. Winds calm.

2. FMC programmed.

3. I then did 3 take off rolls

A. Throttled manually, Heading 272, Did not arm LNAV or VNAV, FD on:  Aircraft maintained centerline of runway and drifted to left towards end of roll

B. Throttled manually, Did not arm LNAV/VNAV, FD on, Heading 273. Pressed Heading Select: Aircraft maintained centerline of runway, no drift.

C. Engaged TOGA, Did not arm LNAV/VNAV, FD on, Heading 273. Pressed Heading Select: Aircraft maintained centerline except at last 30 feet, then began drift.

 

So as not to make this a lengthy post, I will stick with Option B going forward. It seems to be a solution for now. And in the time going forward this glitch will serve to improve my analytical skills. Thanks so much.

Rob

 

 

[scandinavian13 5,192]

Sounds really sketchy to me, honestly.

If it didn't happen in a previous sim version, and then suddenly started happening in a new sim version, I'd say it's a configuration issue. Our 777 code has literally not changed in quite some time, so the change will be found in your variable: your sim version.

Moreover, I'm willing to bet that, if you tried each more than a few times, you'd find that the behavior is present no matter what you do.

[BlueStar 323]

1 hour ago, Bob Marton said:

And in the time going forward this glitch will serve to improve my analytical skills.

Why do you consider this to be a "glitch"?  

[Bob Marton 39]

Kyle, youve never guided me incorrectly, and I agree that it must be some weird configuration matter. My system was set up by Jetline Systems, I am going to discuss with them later today. I definitely do not think it is a 777 issue for the simple reason that in FSX I did not encounter this problem.  Thank you again.

[Bob Marton 39]

10 minutes ago, Bluestar said:

Why do you consider this to be a "glitch"?  

"Glitch" meaning, something wrong with my set up. NOT a 777 glitch.

[xkoote 57]

It is the winds. Try one takeoff with some crosswind, and then the same takeofff again with no winds. You’ll notice that that is the variable. 

 

Cheers,

[Bob Marton 39]

On 3/5/2018 at 3:24 PM, w6kd said:

One other thing to try...turn down the P-factor effects in the realism settings. 

 

 

 

Final Update:  Problem SOLVED. By turning down the P-factor to  zero, this issue has gone away. I did 10 flights under varying conditions, and once P Factor turned down, this problem has not returned.  Thank you all for your help.

[andreh 125]

13 hours ago, Bob Marton said:

Final Update:  Problem SOLVED. By turning down the P-factor to  zero, this issue has gone away. I did 10 flights under varying conditions, and once P Factor turned down, this problem has not returned.  Thank you all for your help.

Strange. P-factor only affects prop-aircraft. I have all realism settings to 100% and I have never had a jet draw to the left.

[Bob Marton 39]

Nonetheless, another 2 flights last night and this morning, no drift off of runway. I did not change any other setting but P-factor. No explanation other than what has happened to me. Head scratcher for certain