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AP procedure

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dlm34077(at)q.com
Guest

Posted: Mon Feb 27, 2012 6:04 pm Post subject: AP procedure

Shortly after start, I apply power to my TT VSGV. The words AP OFF show on the screen. A friend indicated that he did not apply power to the TT until airborne; I suggested that was an unwise procedure because if inadvertently encountering IMC (dark night, low clouds or dark night and unlighted terrain) the AP can be used to maintain control of the aircraft. A touch of the round black knob will automatically synchronize the aircraft to the current heading by leveling wings and maintaining pitch attitude i.e. rate of climb. The TT AP has its own solid state pitch and roll sensors and the straight and level sensors are set at power up, preferably on the ground.  My TT is my third way to keep the clean side up and dirty side down, after the Cheltons and the GRT Sport.  

       [quote][b]

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dave.saylor.aircrafters(a
Guest

Posted: Mon Feb 27, 2012 6:43 pm Post subject: AP procedure

 	  Quote: 	
		  From the manual:


	


"After start up, turn on the autopilot master switch and hold the

aircraft stationary as the internal gyros are initialized. The model

and software	version will be displayed for approximately ten seconds

in the lower left. Then PWR UP in the lower right takes approximately

another ten seconds. When initializing is complete PWR UP will change

to AP OFF."



The take-away is don't move the plane the until the AP reads AP OFF.

Asking it to initialize in flight doesn't always give great results.

I haven't timed it but my sense is that it doesn't really take 20

seconds for it to initialize.  I put it early in the checklist so I'm

doing other stuff anyway.



--Dave Saylor



On Mon, Feb 27, 2012 at 6:03 PM, DLM <dlm34077(at)q.com> wrote:

 	  Quote: 	
		   Shortly after start, I apply power to my TT VSGV. The words AP OFF show on

 the screen. A friend indicated that he did not apply power to the TT until

 airborne; I suggested that was an unwise procedure because if inadvertently

 encountering IMC (dark night, low clouds or dark night and unlighted

 terrain) the AP can be used to maintain control of the aircraft. A touch of

 the round black knob will automatically synchronize the aircraft to the

 current heading by leveling wings and maintaining pitch attitude i.e. rate

 of climb. The TT AP has its own solid state pitch and roll sensors and the

 straight and level sensors are set at power up, preferably on the ground.

 My TT is my third way to keep the clean side up and dirty side down, after

 the Cheltons and the GRT Sport.

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amekler

Joined: 07 Oct 2010
Posts: 164

Posted: Tue Feb 28, 2012 1:19 am Post subject: AP procedure

I do the same. It takes less time then the adhrs .

Alan

Sent from my iPhone



On Feb 27, 2012, at 9:03 PM, "DLM" <dlm34077(at)q.com (dlm34077(at)q.com)> wrote:



[quote]           <![endif]-->       <![endif]-->       

Shortly after start, I apply power to my TT VSGV. The words AP OFF show on the screen. A friend indicated that he did not apply power to the TT until airborne; I suggested that was an unwise procedure because if inadvertently encountering IMC (dark night, low clouds or dark night and unlighted terrain) the AP can be used to maintain control of the aircraft. A touch of the round black knob will automatically synchronize the aircraft to the current heading by leveling wings and maintaining pitch attitude i.e. rate of climb. The TT AP has its own solid state pitch and roll sensors and the straight and level sensors are set at power up, preferably on the ground.  My TT is my third way to keep the clean side up and dirty side down, after the Cheltons and the GRT Sport.  

        	  Quote: 	
		  

	


[b]

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rv10flyer

Joined: 25 Aug 2009
Posts: 364

Posted: Tue Feb 28, 2012 5:17 am Post subject: Re: AP procedure

Same for me. Toggle switch near ap. Startup all avionics with aux bat once plane is pulled out. By the time I hop in grt and xm is all ready to go. In case something goes wrong with me my wife knows how to hit the round knob too. She has been learning alot on the last 5 flights with the family. I would not build an RV without ap. In no time you are turning and then descending into a spiral dive.

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_________________
Wayne G.

Mauledriver(at)nc.rr.com
Guest

Posted: Tue Feb 28, 2012 6:49 am Post subject: AP procedure

I have the AP (and the GRTs) on a 2nd buss - not same as starter     buss - so they come on with power up and complete their     initialization by the time I've started the engine and thought about     moving.

     

     Makes no sense to apply power after liftoff unless one has some     unfounded fear about the AP 'taking over' inadvertently.

     

     Bill

     

     

     On 2/27/2012 9:03 PM, DLM wrote:     [quote]                          <![endif]-->       <![endif]-->                

Shortly after start, I apply power to               my TT VSGV. The words               AP OFF show on the screen. A friend indicated that he did               not apply power to               the TT until airborne; I suggested that was an unwise               procedure because if               inadvertently encountering IMC (dark night, low clouds or               dark night and               unlighted terrain) the AP can be used to maintain control               of the aircraft. A               touch of the round black knob will automatically               synchronize the aircraft to               the current heading by leveling wings and maintaining               pitch attitude i.e. rate               of climb. The TT AP has its own solid state pitch and roll               sensors and the               straight and level sensors are set at power up, preferably               on the ground.                My TT is my third way to keep the clean side up and dirty               side down, after the               Cheltons and the GRT Sport.       

        	  Quote: 	
		  

	
     [b]

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dlm34077(at)q.com
Guest

Posted: Tue Feb 28, 2012 7:12 am Post subject: AP procedure

Another thing I set was that the GRT is connected by its various power inputs to the primary bus and essential bus. The AP is on the primary bus only and the Cheltons are on the essential bus only.  

         

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Bill Watson

 Sent: Tuesday, February 28, 2012 7:47 AM

 To: rv10-list(at)matronics.com

 Subject: Re: AP procedure  

  

   

I have the AP (and the GRTs) on a 2nd buss - not same as starter buss - so they come on with power up and complete their initialization by the time I've started the engine and thought about moving.

 

 Makes no sense to apply power after liftoff unless one has some unfounded fear about the AP 'taking over' inadvertently.

 

 Bill

 

 

 On 2/27/2012 9:03 PM, DLM wrote:   

   <![endif]-->        <![endif]-->Shortly after start, I apply power to my TT VSGV. The words AP OFF show on the screen. A friend indicated that he did not apply power to the TT until airborne; I suggested that was an unwise procedure because if inadvertently encountering IMC (dark night, low clouds or dark night and unlighted terrain) the AP can be used to maintain control of the aircraft. A touch of the round black knob will automatically synchronize the aircraft to the current heading by leveling wings and maintaining pitch attitude i.e. rate of climb. The TT AP has its own solid state pitch and roll sensors and the straight and level sensors are set at power up, preferably on the ground.  My TT is my third way to keep the clean side up and dirty side down, after the Cheltons and the GRT Sport.   	  Quote: 	
		     	
  

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Bob Turner

Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA

Posted: Tue Feb 28, 2012 2:37 pm Post subject: Re: AP procedure

I have a Trio autopilot (which I like a lot btw), and I also boot it up prior to takeoff, not because I have to (it boots in flight just fine) but because it is my "third source" of attitude information, should there be a disagreement between the other two. The Trio shows a symbolic turn coordinator, even when disengaged, so it is easy to compare to the other 2 attitude sources. I also use the autotrim feature, manually, if the autopilot is not engaged. So I always boot it up prior to takeoff.

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_________________
Bob Turner
RV-10 QB

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