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Roll oscillation (Resolved)
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fox956



Joined: 05 Jan 2010
Posts: 58

PostPosted: Sun Mar 05, 2017 8:45 am    Post subject: Reply with quote

I am moving this problem I'm having to it's own topic because for me the problem is not resolved.
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Banananav



Joined: 08 Oct 2015
Posts: 21
Location: 5nm West of EGYD

PostPosted: Sun Apr 16, 2017 12:43 pm    Post subject: Reply with quote

I am experiencing exactly the same problem

Chris
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Chris Finn

"More Beer - Bigger Women - Longer Runways"
(Buccaneer aircrew toast)
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fox956



Joined: 05 Jan 2010
Posts: 58

PostPosted: Sun Apr 16, 2017 2:09 pm    Post subject: Reply with quote

Hi Chris,

Check the other topic I posted. Several people have had the same problem and each seem to have help resolve their issue by different means.

I still get them for a short time once in awhile. It seems to be related to the autopilot. I have noticed that when my scenery is jerky I tend to get some of these oscillations. Mark is coming out with another version update and I think the new update will help all of us.

Larry
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Banananav



Joined: 08 Oct 2015
Posts: 21
Location: 5nm West of EGYD

PostPosted: Tue Apr 18, 2017 11:20 am    Post subject: Reply with quote

Thanks Larry
Wilco
I'll have a trial flight on Thursday (when wife's at work !) and let you know how I got on.
Chris
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Chris Finn

"More Beer - Bigger Women - Longer Runways"
(Buccaneer aircrew toast)
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Banananav



Joined: 08 Oct 2015
Posts: 21
Location: 5nm West of EGYD

PostPosted: Thu Apr 20, 2017 2:23 pm    Post subject: Reply with quote

Hi Larry et al

Set roll stab to 1.1, got airborne with no weather, max ZFW and fuel for max TOW.

Climbed to Fl 380. Up to Fl 370 (AUW 167klbs) all very stable but see later comments. At Fl 370 roll instability started in LANAV. More jerky than with 0.9 set and continued in HDG SEL and with roll instability continuing in turns.

No probs when AP disconnected.

With 1.1 set heading capture is very slow and LNAV snakes around track, taking three or four attempts to settle on track.

Will try the same flight again but with a lower AUW to see if this is weight or altitude dependent.

However, this seems to be an AP rather than an LNAV issue.

Right, off to BBMF tomorrow to get my weekly fix of real aeroplanes !

Rgds

Chris
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Chris Finn

"More Beer - Bigger Women - Longer Runways"
(Buccaneer aircrew toast)
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Banananav



Joined: 08 Oct 2015
Posts: 21
Location: 5nm West of EGYD

PostPosted: Thu Apr 20, 2017 2:30 pm    Post subject: Reply with quote

Should also say, using SA 1.70 and P3D 3.4
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Chris Finn

"More Beer - Bigger Women - Longer Runways"
(Buccaneer aircrew toast)
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fox956



Joined: 05 Jan 2010
Posts: 58

PostPosted: Fri Apr 21, 2017 5:34 am    Post subject: Reply with quote

Hi Chris,

Yes, I noticed the same thing when AP was disconnected. A coincidence or not but my problem seemed to got better when I changed my USB Hub that my MCP and CDUs were connected to.

Have you read the topic in this forum by Mark about the "Status Update on next version" Mar.11, 2017? I feel confident that the new update will fix this issue some of us are having.

I am still getting this rolling from side to side occasionally but it doesn't usually last for a long time before it subsides.

Larry
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Banananav



Joined: 08 Oct 2015
Posts: 21
Location: 5nm West of EGYD

PostPosted: Fri Apr 21, 2017 11:48 am    Post subject: Reply with quote

Thanks Larry,
Hadn't noticed Mark's Update, but looks good.
Interestingly, all my USB connections are direct - no hub.
Cheers
Chris
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Chris Finn

"More Beer - Bigger Women - Longer Runways"
(Buccaneer aircrew toast)
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Jetcos



Joined: 30 Sep 2005
Posts: 968
Location: Newmarket,Ontario

PostPosted: Fri Apr 21, 2017 11:57 am    Post subject: Reply with quote

Sometimes a powered USB Hub can supply the power better than the Motherboard powered USB slots.

Worth a try.

We use D-Link Powered USB Hubs.
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Last edited by Jetcos on Fri Apr 21, 2017 12:29 pm; edited 1 time in total
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fox956



Joined: 05 Jan 2010
Posts: 58

PostPosted: Fri Apr 21, 2017 12:23 pm    Post subject: Reply with quote

Hi,

All my USB Hubs are D-Link and are powered.

Awaiting Mark's new update.

Larry
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MichaelYSSY



Joined: 06 Jan 2015
Posts: 388
Location: Sydney - Australia

PostPosted: Fri Apr 21, 2017 4:12 pm    Post subject: Reply with quote

Hi

I was using usb hubs when I first put my JetMax 737 together
Had all sorts of trouble (they were powered hubs)

In the end I threw them out and connected all my stuff directly to the PC
Had to add an extra USB PC Board to the Avionics PC to allow for everything but I don't seem to be having any USB related problems at all.

Cheers
Michael
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JetMax 737, SA 737 v1.4
P3D 3.4 FSUIPC 4.95
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