Jump to content

Archived

This topic is now archived and is closed to further replies.

samdean

A few questions from my last flight...

Recommended Posts

Captains, some questions from my last flight I would appreciate some insights on: 1. Takeoff - D-TO (33C), flap 5; when N1 climb thrust is set, the horizontal FD bar stays very high, meaning that it wants me to pull up; problem is, if I do that, I start to bleed airspeed and come close to a stall. What's going on here? Why is the AFDS commanding such an aggressive climb-out? If I select CMD, the bar drops and the aircraft accelerates normally through its flap retraction speeds. 2. During descent, VNAV started doing something funny: it started to command speed drops - first by dropping to 270, then 260, 250... 240... all the way to 200. All within a few seconds. The little magenta marker on my PFD speed-tape gave it away... Any idea what this is? 3. What is the difference between G/P (glide-path) and G/S (glideslope) being annunicated on the PFD? What dictates which one shows up? Thanks! Sam Kharey

Share this post


Link to post
Share on other sites

1) When did you activate the AP? At the beginning of the flight it is normal that you'll climb with low speed until you reach accleration altitude. Maybe that's why you see the high attitude indication. 3) G/P is a glidepath calculated from the FMC. In G/S mode you're following the actual ILS. So is G/P mode you don't follow the ILS, but only the calculation the FMC has made where the glidepath should be.


Greetings from the 737 flightdeck!

Share this post


Link to post
Share on other sites

Concerning number two, VNAV speeds are effected by the legs page, the altitude speed restriction, flap settings and the descent speed in the descent page.


Brad Rich
 

Share this post


Link to post
Share on other sites

1. Takeoff - D-TO (33C), flap 5; when N1 climb thrust is set, the horizontal FD bar stays very high, meaning that it wants me to pull up; problem is, if I do that, I start to bleed airspeed and come close to a stall. What's going on here? Why is the AFDS commanding such an aggressive climb-out? If I select CMD, the bar drops and the aircraft accelerates normally through its flap retraction speeds.Are you taking off with VNAV engaged (as recommended)?Is V2+20 shown in the top left of the PFD (magenta)?


CRAIG MACPHEE • Core i5 4690K • GTX 460 1GB

pmdgswitch.jpg

Share this post


Link to post
Share on other sites

  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Donation Goals

    AVSIM's 2020 Fundraising Goal

    Donate to our annual general fundraising goal. This donation keeps our doors open and providing you service 24 x 7 x 365. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. We reset this goal every new year for the following year's goal.


    42%
    $10,670.00 of $25,000.00 Donate Now
×
×
  • Create New...