16 Apr 2024, 02:05 [ UTC - 5; DST ]
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Post subject: TruTrak autopilot LPV approach  Posted: 24 Apr 2018, 08:42 |
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Joined: 04/29/13
Posts: 706
Post Likes: +476
Aircraft: C177RG, ATOS-VR
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In case anyone was wondering how well a TruTrak autopilot performed in a certified aircraft, I made a video of an LPV approach flown by a TruTrak. Despite up and downdrafts the last couple of miles, the needles (little yellow triangles on my Aspen) were never off more than half their width. https://www.youtube.com/watch?v=hXq9IA4CXbcVince
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Post subject: Re: TruTrak autopilot LPV approach Posted: 24 Apr 2018, 17:31 |
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Joined: 01/01/12
Posts: 249
Post Likes: +64
Aircraft: A36
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Nice! What is the whirligig on the glareshiele_dash? Edward
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Post subject: Re: TruTrak autopilot LPV approach Posted: 24 Apr 2018, 18:35 |
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Joined: 04/29/13
Posts: 706
Post Likes: +476
Aircraft: C177RG, ATOS-VR
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Username Protected wrote: Nice! What is the whirligig on the glareshiele_dash? Edward That's the second gopro camera. It didn't work out nearly as well as I planned. I was trying to get a close up of the Aspen, but the field of view is just too wide. Vince
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Post subject: Re: TruTrak autopilot LPV approach Posted: 25 Apr 2018, 11:45 |
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Joined: 03/17/08
Posts: 6062
Post Likes: +12469
Location: KMCW
Aircraft: B55 PII,F-1,L-2,OTW,
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Username Protected wrote: From the Vizion AFMS - Rev B :
3.6.Altitude Limitations
The Vizion autopilot system has an altitude engage/disengage height limit. This limit shall be used for all modes of flight.
[*]The minimum autopilot operating altitude is 700 feet AGL.
You get the glideslope, but lose the lower end of the LPV approach with a 700' AGL limitation. The exp version is phenomenal. It will plant the airplane in the fixed distance markers with the centerline between the wingtips. I'm sure this was a certification CYA by the feds.
_________________
Tailwinds,
Doug Rozendaal
MCW
Be Nice, Kind, I don't care, be something, just don't be a jerk ;-)
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Post subject: Re: TruTrak autopilot LPV approach Posted: 25 Apr 2018, 14:55 |
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Joined: 03/31/16
Posts: 229
Post Likes: +36
Aircraft: M20c
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Agreed. The company is currently working on aspen ILS integration and getting the 700 ft agl limitation removed. It just allowed them to get it certified / expand model list faster. Username Protected wrote: From the Vizion AFMS - Rev B :
3.6.Altitude Limitations
The Vizion autopilot system has an altitude engage/disengage height limit. This limit shall be used for all modes of flight.
[*]The minimum autopilot operating altitude is 700 feet AGL.
You get the glideslope, but lose the lower end of the LPV approach with a 700' AGL limitation. The exp version is phenomenal. It will plant the airplane in the fixed distance markers with the centerline between the wingtips. I'm sure this was a certification CYA by the feds.
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Post subject: Re: TruTrak autopilot LPV approach Posted: 25 Apr 2018, 16:26 |
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Joined: 01/31/10
Posts: 1200
Post Likes: +489
Location: Gainesville, FL (X60)
Aircraft: 1974 Bonanza A36
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Username Protected wrote:
The exp version is phenomenal. It will plant the airplane in the fixed distance markers with the centerline between the wingtips. I'm sure this was a certification CYA by the feds.
+1
That is exactly what the TruTrak rep told me at Sun n Fun. Just a means to get the autopilot STC certified in aircraft quickly. They said restrictions will be lifted once more units in the field and demonstrate compliance.
Also the one rep there had been doing approaches with the certified unit. Said just like Doug mentioned was solid on the LPV App.
Best news, hope to have Bonanzas STC’d by this fall.
Craig
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Post subject: Re: TruTrak autopilot LPV approach Posted: 25 Apr 2018, 21:57 |
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Joined: 04/29/13
Posts: 706
Post Likes: +476
Aircraft: C177RG, ATOS-VR
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What I would like most is a constant airspeed climb/descent. The exp version has this but the feds made them take it out of the certified product. They are hoping they can get this back soon.
Vince
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Post subject: Re: TruTrak autopilot LPV approach Posted: 25 Apr 2018, 22:01 |
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Joined: 04/29/13
Posts: 706
Post Likes: +476
Aircraft: C177RG, ATOS-VR
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Username Protected wrote: You get the glideslope, but lose the lower end of the LPV approach with a 700' AGL limitation. In the video you can see the autopilot stayed on the LPV approach until I disconnected it at 510' (400AGL). Don't know if I am required to turn it off at 700' or if it is supposed so suspend, but either way, it works great now. As for ILS, I have not flow an ILS for real since LPV approaches came out. I still fly them several times a year for IPC, but LPV is much more accurate in my opinion. No bouncing needles, no changes as you fly over a steel plant etc. Vince
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