Using the popup GPS and Autopilot

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AS indicated in the manual, there is a popup GPS. Also, there is a popup Autopilot (Shift +4). My question is: Are these popups really functional? Today, I tried to fly the DC-6B with them and was unsuccesful as far as the plane maintaining the required course.  
As I have noticed with other planes, somewhere on the main panel there is usually a button that allows one to toggle between GPS and NAV. I do not see that on this plane. Therefore, are there other buttons that must be set elsewhere before the GPS will maintain lateral navigation if the NAV button is enabled on the Autopilot?

I am really enjoying this airplane and remember it so well from my youth. So glad that someone made it available for me to fly. Flight dynamics are great. 

Jack 

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macjack39 Members Profile Send Private Message Find Members Posts Add to Buddy List Check-In Staff Joined: 16 Feb 2013 Points: 5	Post Options Post Reply Quote macjack39 Report Post Thanks(0) Quote Reply Topic: Using the popup GPS and Autopilot Posted: 16 Feb 2013 at 1:17am
	AS indicated in the manual, there is a popup GPS. Also, there is a popup Autopilot (Shift +4). My question is: Are these popups really functional? Today, I tried to fly the DC-6B with them and was unsuccesful as far as the plane maintaining the required course. As I have noticed with other planes, somewhere on the main panel there is usually a button that allows one to toggle between GPS and NAV. I do not see that on this plane. Therefore, are there other buttons that must be set elsewhere before the GPS will maintain lateral navigation if the NAV button is enabled on the Autopilot? I am really enjoying this airplane and remember it so well from my youth. So glad that someone made it available for me to fly. Flight dynamics are great. Jack

PeterL Members Profile Send Private Message Find Members Posts Add to Buddy List Check-In Staff Joined: 20 Jan 2012 Location: Netherlands Points: 20	Post Options Post Reply Quote PeterL Report Post Thanks(0) Quote Reply Posted: 20 Feb 2013 at 1:10pm
	Hi Jack, You can't let the A/P follow the route, there is no GPS-NAV switch. LNAV did not exist in those days. So you have to navigate all by yourself by selecting headings to follow your flightplan. I use the GPS window to check if my aircraft stays on course and follows the pink course line correctly. Regards Peter

macjack39 Members Profile Send Private Message Find Members Posts Add to Buddy List Check-In Staff Joined: 16 Feb 2013 Points: 5	Post Options Post Reply Quote macjack39 Report Post Thanks(0) Quote Reply Posted: 21 Feb 2013 at 9:09pm
	By "selecting headings" does this mean if I turn the Heading Selector meanie head on the Captain's panel to the desired heading that the AP will automatically turn to that heading if the AP is "On"? If not, then it seems that I must maually turn to the desired heading and then enable the Heading Hold button on the AP. Please clarify. Thanks. Jack