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Vnav cuts corner on approach

Featured Replies

I've done a couple practice approaches to PHNL ILS 08L, with my intercept speed being at the fastest 180kt.  I do find that the aircraft "smart turns" before intercepting the "pink line" which is normal. I'm blue needles at the time (ILS displayed), and when the aircraft recognizes it turned a bit too early (usually due to wind pushing it away from the LOC), it maintains a bit of a track towards the localizer. Within a few miles it has corrected back to on course. 

 

This is pretty much how the real aircraft behaves (yes! I know!). The autopilot is not the greatest at intercepting the final at speeds around 180kts and above. It will do it, but it will need some time to correct. 

 

Regarding your issue- what speed are you flying to intercept final? and does it never correct back on course? I know it's a pain, but would you be able to post a few screen shots when this is happening? A few V-key presses might make me understand what is happening.

 

-B

Brendan R, KDXR PHNL KJFK

Type rated: SF34 / DH8 (Q400) / DC9 717 MD-88/ B767 (CFI/II/MEI/ATP)

Majestic Software Q400 Beta Team / Pilot Consultant / Twitter @violinvelocity

I've done a couple practice approaches to PHNL ILS 08L, with my intercept speed being at the fastest 180kt.  I do find that the aircraft "smart turns" before intercepting the "pink line" which is normal. I'm blue needles at the time (ILS displayed), and when the aircraft recognizes it turned a bit too early (usually due to wind pushing it away from the LOC), it maintains a bit of a track towards the localizer. Within a few miles it has corrected back to on course. 

 

This is pretty much how the real aircraft behaves (yes! I know!). The autopilot is not the greatest at intercepting the final at speeds around 180kts and above. It will do it, but it will need some time to correct. 

 

Regarding your issue- what speed are you flying to intercept final? and does it never correct back on course? I know it's a pain, but would you be able to post a few screen shots when this is happening? A few V-key presses might make me understand what is happening.

 

-B

 

Hi Brendan,

try to fly a RNAV Approach with a turn to final and you will see the issue. It is less noticeable in LOC-mode.

Regards, Chris

Regards,
Chris Volle

i7700k @ 4,7, 32gb ram, Win10, MSI GTX1070.

There are any response of the team? What they don't fixed in 1.008?

 

 

Enviado desde mi iPhone 5S con Tapatalk

José Fco. Ibáñez /// i7 6700k (Delid) @ 4,6 Ghz /// Asrock Z170 OC Formula /// 16GB RAM G.Skill Ripjaws V 3200 /// GTX 1070 Founders Edition 8GB /// LG 27UD58 4K 27' // OCZ Vertex 4 SSD (X-Plane 10) & SAMSUNG 850 EVO SSD (P3D V3) /// Windows 10 Pro x64

 

sig_FSL-By-Wire.jpg

@

Chrjs

 

I will give it a try- the turn from TEB to the ILS 22L in Newark KEWR might be a good place to try

Brendan R, KDXR PHNL KJFK

Type rated: SF34 / DH8 (Q400) / DC9 717 MD-88/ B767 (CFI/II/MEI/ATP)

Majestic Software Q400 Beta Team / Pilot Consultant / Twitter @violinvelocity

@

Chrjs

 

I will give it a try- the turn from TEB to the ILS 22L in Newark KEWR might be a good place to try

Thanks. I noticed this problem less with ILS-approaches, however with "pure" RNAV Approaches flown in NAV/VNAV. For example the following GPS Approach into PAJN (I know, no applicable for planes of category C/D in real life) - coming from the IAF Nimle the plane turned way too early on final approach and somewhere got lost on a parallel course south of the original path.

http://skyvector.com/files/tpp/1313/pdf/01191RV8.PDF

Looking forward to your obeservations!

Regards,
Chris Volle

i7700k @ 4,7, 32gb ram, Win10, MSI GTX1070.

I've asked the same question,

No official response from crosswind?

 

 

Enviado desde mi iPhone 5S con Tapatalk

José Fco. Ibáñez /// i7 6700k (Delid) @ 4,6 Ghz /// Asrock Z170 OC Formula /// 16GB RAM G.Skill Ripjaws V 3200 /// GTX 1070 Founders Edition 8GB /// LG 27UD58 4K 27' // OCZ Vertex 4 SSD (X-Plane 10) & SAMSUNG 850 EVO SSD (P3D V3) /// Windows 10 Pro x64

 

sig_FSL-By-Wire.jpg

I think it's being looked into guys... we have a shopping list of stuff we're working through! No worries. 


I think it's being looked into guys... we have a shopping list of stuff we're working through! No worries. 

Brendan R, KDXR PHNL KJFK

Type rated: SF34 / DH8 (Q400) / DC9 717 MD-88/ B767 (CFI/II/MEI/ATP)

Majestic Software Q400 Beta Team / Pilot Consultant / Twitter @violinvelocity

It's fixed in the new hot fix?

 

 

Enviado desde mi iPhone 5S con Tapatalk

José Fco. Ibáñez /// i7 6700k (Delid) @ 4,6 Ghz /// Asrock Z170 OC Formula /// 16GB RAM G.Skill Ripjaws V 3200 /// GTX 1070 Founders Edition 8GB /// LG 27UD58 4K 27' // OCZ Vertex 4 SSD (X-Plane 10) & SAMSUNG 850 EVO SSD (P3D V3) /// Windows 10 Pro x64

 

sig_FSL-By-Wire.jpg

It's fixed in the new hot fix?

 

 

Enviado desde mi iPhone 5S con Tapatalk

Jose, Why don't your try a test flight with new hot fix and see? I,m at work now but I will try tonight.

Tom

Tom Davis

 

I7 6700k 4.7 ghz, gtx 1080ti , 16gb 3400 ram, 32’’ 2k monitor, 1TB ssd, 500gb ssd, 250gb ssd, h115 water cooler

UAL440.png

Had the same thing happen 5 minutes ago using 1.008 with hotfix.

:(

 

I don't know how this bug isn't fixed yet...

 

 

Enviado desde mi iPhone 5S con Tapatalk

José Fco. Ibáñez /// i7 6700k (Delid) @ 4,6 Ghz /// Asrock Z170 OC Formula /// 16GB RAM G.Skill Ripjaws V 3200 /// GTX 1070 Founders Edition 8GB /// LG 27UD58 4K 27' // OCZ Vertex 4 SSD (X-Plane 10) & SAMSUNG 850 EVO SSD (P3D V3) /// Windows 10 Pro x64

 

sig_FSL-By-Wire.jpg

  • Commercial Member

Hi guys,

 

I am out at the moment but will test this when I get back home.

 

So far, the FMS is flying all RNAV correctly.

 

Please follow the thread "Cutting off WP's - STILL" in the MJC forums for latest information.

 

Best regards,

Robin.

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