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Dreamflight767

CRJ won't stay on FLT PLN

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Hello:

 

I am using CRJ version 2.2 SP1 in P3Dv4.5 HF3.  I tried a test flight today but twice the airplane flew off the programmed flight path.  NAV remained engaged.  First time, airplane did a 180 degree turn and just flew on its own.  2nd time, airplane drifted of the route by at least 50NM before I terminated the flight.

 

Thanks.

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What was the model (550, 700 900 or 1000) and flight plan? Do you recall at what point the aircraft made a 180 degree turn, and at what point it drifted off of the route by 50 miles? Will try to duplicate.

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This is not the normal behaviour of the CRJs.

In which phase of the flight does it happen (departure on a SID, Cruise or in somewhat else)?

What I could observe is that the CRJ overshoots a waypoint when the Departure SID contains sharp turns and you fly at too high a speed.
Then the CRJ tries to come back on course with 180 degrees. 
During a normal cruise phase I have never seen this before.

 

Wolfgang

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Hi:

 

I was flying the 550.  I was going fast..Mach .80 and the event happened twice while in cruise.  

 

KHIO/31L CHISM4 IMB J523 BCE DCT TCS DCT MRF DCT KMRF/31

 

First deviation occurred somewhere along J523.  Send deviation occurred about half way between BCE and TCS.  I was at FL380.  

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26 minutes ago, Dreamflight767 said:

Hi:

 

I was flying the 550.  I was going fast..Mach .80 and the event happened twice while in cruise.  

 

KHIO/31L CHISM4 IMB J523 BCE DCT TCS DCT MRF DCT KMRF/31

 

First deviation occurred somewhere along J523.  Send deviation occurred about half way between BCE and TCS.  I was at FL380.  


Thanks. I will try this flight. Were you using Active Sky or other r/w weather?

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Yeah I just had this one appear as well. Multiple re-selections of Direct-to resulted in multiple attempts to veer off-course, commanded by the F/D in NAV mode. Gonna dig and see why.....

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What I've noticed is that the deviations (for me) occur after a direct-to segment. Wonder if it's like this for anyone else? 

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On 7/5/2020 at 6:20 PM, Dreamflight767 said:

Hi:

 

I was flying the 550.  I was going fast..Mach .80 and the event happened twice while in cruise.  

 

KHIO/31L CHISM4 IMB J523 BCE DCT TCS DCT MRF DCT KMRF/31

 

First deviation occurred somewhere along J523.  Send deviation occurred about half way between BCE and TCS.  I was at FL380.  

 

I just completed this flight, and I did have an LNAV problem. 

 

I used the same flight plan and aircraft. ASPD3 (Beta 7) weather was active, which gave almost a direct tailwind of 46 knots at FL 370

 

NO problems on the J523 segment, but the aircraft left the NAV track between BCE and TCS. That is a 361 nm direct leg between those two waypoints.

 

When I was about 1/3 along the route segment, 133 nm past BCE, with 228 nm still to go to TCS. the aircraft slowly turned about 40 degrees to the left, and started flying away from the course line. I let it go about 10 miles, and it showed no signs of coming back. I went to HDG select, and steered back onto the course line. I was about 208 nm from TCS when I was back on the course line. I then did a DIR INTC to TCS, EXEC, and went back to NAV mode. The aircraft continued on the track to TCS, then make the turn to MRF.

 

The rest of the flight went smoothly without further deviations.

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1 minute ago, JRBarrett said:

 

I just completed this flight, and I did have an LNAV problem. 

 

I used the same flight plan and aircraft. ASPD3 (Beta 7) weather was active, which gave almost a direct tailwind of 46 knots at FL 370

 

NO problems on the J523 segment, but the aircraft left the NAV track between BCE and TCS. That is a 361 nm direct leg between those two waypoints.

 

When I was about 1/3 along the route segment, 133 nm past BCE, with 228 nm still to go to TCS. the aircraft slowly turned about 40 degrees to the left, and started flying away from the course line. I let it go about 10 miles, and it showed no signs of coming back. I went to HDG select, and steered back onto the course line. I was about 208 nm from TCS when I was back on the course line. I then did a DIR INTC to TCS, EXEC, and went back to NAV mode. The aircraft continued on the track to TCS, then make the turn to MRF.

 

The rest of the flight went smoothly without further deviations.

 

Interesting. I did a direct-to across a whole Canadian province when I had my issue. Sounds like we're getting close!

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1 hour ago, Michel Montreuil said:

Similar to this? 

 

 

No, this is not the issue being discussed. This thread is about an issue that was fixed with 2.2.0.1. 

 

Your video shows a station passage wiggle that I seem to get with every plane in P3D, even the stock ones

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