Login    Register
  • Author
    Message

RNAV glide slope gain

Postby ski38off » Mon Mar 18, 2019 8:06 pm

Does the glideslope gain apply just to an ILS or to an RNAV also? When on an RNAV, the vertical AP is very lazy and overshoots. I have the gain at 400%.
ski38off
 
Posts: 9
Joined: Tue Jan 28, 2014 8:23 pm

Re: RNAV glide slope gain

Postby GRT_Jeff » Tue Mar 19, 2019 5:34 am

GPSV mode uses the Glideslope Gain and tracks the same way. 400% is very high. Does it work fine for an ILS but not RNAV? Are you seeing this everywhere or one particular approach?
GRT_Jeff
 
Posts: 577
Joined: Tue Dec 11, 2012 12:11 am

Re: RNAV glide slope gain

Postby ski38off » Thu Mar 21, 2019 4:59 pm

I believe it behaves the same for both an ILS and GPSV, but I will go out in the next couple days and try both. Typically at glide slope intercept, the plane takes maybe 5 seconds to start the pitch down, by this time I am high and the roller coaster ride begins.
ski38off
 
Posts: 9
Joined: Tue Jan 28, 2014 8:23 pm

Re: RNAV glide slope gain

Postby GRT_Jeff » Thu Mar 21, 2019 9:37 pm

If the approach mode was already armed then it should immediately start pitching down when you reach the intercept point (zero deviation). Turn on the flight director (FLT DIR) to see what the EFIS wants to do. The flight director and autopilot are driven by the same data.
GRT_Jeff
 
Posts: 577
Joined: Tue Dec 11, 2012 12:11 am

Return to Autopilot

Who is online

Users browsing this forum: No registered users and 2 guests