Search found 36 matches

by BillinDurham
Wed Apr 07, 2021 6:55 pm
Forum: EIS Sensors
Topic: Low oil pressure message while HX displays normal pressure
Replies: 1
Views: 253

Low oil pressure message while HX displays normal pressure

I suddenly started to get 'low oil pressure' messages in flight. They seem to occur randomly but multiple times per flight. At the same time, the oil pressure displayed on my HX is constant and within specs without any momentary excursions when the message appears. I did do a time in service replace...
by BillinDurham
Mon Sep 16, 2019 4:36 pm
Forum: Autopilot
Topic: When HX (now HXr) is driving TT AP it constantly wing rocks
Replies: 31
Views: 19290

Re: When HX (now HXr) is driving TT AP it constantly wing ro

UPDATE: The wing rocking problem has been solved! SUMMARY: The wing rocking that only occurs when the TT AP is being driven by the GRT HX or HXr EFIS, can be eliminated by increasing 2 settings within the TT AP unit: 1) LATERAL ACTIVITY =5 (or greater) 2) MICRO ACTIVITY =10 (currently testing settin...
by BillinDurham
Thu Sep 05, 2019 5:01 pm
Forum: Autopilot
Topic: When HX (now HXr) is driving TT AP it constantly wing rocks
Replies: 31
Views: 19290

Re: When HX (now HXr) is driving TT AP it constantly wing ro

Bill, I can’t find anything on the TT web site about a ‘Programmer’ model. There is a manual for the Digiflight II VS which agrees with my previous post - that you have to push the mode button until displaying ‘GPSS’ to get it to accept external commands. Yours must be a rare model. Perhaps you can...
by BillinDurham
Tue Sep 03, 2019 4:19 pm
Forum: Autopilot
Topic: When HX (now HXr) is driving TT AP it constantly wing rocks
Replies: 31
Views: 19290

Re: When HX (now HXr) is driving TT AP it constantly wing ro

I have the DII VSGV; DIGIFLIGHT II VS GPSS V PPROGRAMMER manufactured sometime before 2011. Normally I have it switched to the GRT HX or HXr. In that mode of operation, all I do is turn the AP on by pressing the black knob. From that point on, I generally don't touch the AP and operate it all modes ...
by BillinDurham
Wed Aug 21, 2019 2:38 pm
Forum: Autopilot
Topic: When HX (now HXr) is driving TT AP it constantly wing rocks
Replies: 31
Views: 19290

Summary of Wing Rocking Problem when HX or HXr is driving TT

Problem: Whenever the GRT HXr is driving the TruTrak Autopilot, my RV-10 wings rock with a period of approximately 4 seconds. It sickens passengers and is driving this builder/pilot a bit crazy. - This problem occurs in all GRT AP modes; ENAV, GNAV, and Heading modes. - It occurs independent of any ...
by BillinDurham
Wed Aug 21, 2019 1:44 pm
Forum: Autopilot
Topic: When HX (now HXr) is driving TT AP it constantly wing rocks
Replies: 31
Views: 19290

Re: When HX (now HXr) is driving TT AP it constantly wing ro

Did you try Jeff's suggestion? Let the 430 drive the TT; watch the efis carefully. Does the AI or heading indicator (tape) ever "twitch" (even if the plane is rock-solid level)? I'm really curious as what can be going on here. I'm missing where Jeff's suggestion made(?) Maybe I misunderst...
by BillinDurham
Thu Aug 15, 2019 5:44 pm
Forum: Autopilot
Topic: When HX (now HXr) is driving TT AP it constantly wing rocks
Replies: 31
Views: 19290

Re: When HX (now HXr) is driving TT AP it constantly wing ro

Did you try Jeff's suggestion? Let the 430 drive the TT; watch the efis carefully. Does the AI or heading indicator (tape) ever "twitch" (even if the plane is rock-solid level)? I'm really curious as what can be going on here. I'm missing where Jeff's suggestion made(?) Maybe I misunderst...
by BillinDurham
Wed Aug 14, 2019 8:33 am
Forum: Autopilot
Topic: When HX (now HXr) is driving TT AP it constantly wing rocks
Replies: 31
Views: 19290

Re: When HX (now HXr) is driving TT AP it constantly wing ro

Bill, you’re right. If the TT, by itself, runs okay, that should rule out loose brackets. This is another guess you could try fairly easily: for my Trio, I switch all 3 lines (ARINC pair, plus serial) when going from direct gps to autopilot, to HX to autopilot. I don’t think TT recommends that, but...
by BillinDurham
Tue Jul 23, 2019 5:13 pm
Forum: Autopilot
Topic: When HX (now HXr) is driving TT AP it constantly wing rocks
Replies: 31
Views: 19290

Re: When HX (now HXr) is driving TT AP it constantly wing ro

Bill, you’re right. If the TT, by itself, runs okay, that should rule out loose brackets. This is another guess you could try fairly easily: for my Trio, I switch all 3 lines (ARINC pair, plus serial) when going from direct gps to autopilot, to HX to autopilot. I don’t think TT recommends that, but...
by BillinDurham
Tue Jul 23, 2019 4:15 pm
Forum: Autopilot
Topic: When HX (now HXr) is driving TT AP it constantly wing rocks
Replies: 31
Views: 19290

Re: When HX (now HXr) is driving TT AP it constantly wing ro

Bill, you’re right. If the TT, by itself, runs okay, that should rule out loose brackets. This is another guess you could try fairly easily: for my Trio, I switch all 3 lines (ARINC pair, plus serial) when going from direct gps to autopilot, to HX to autopilot. I don’t think TT recommends that, but...