Jump to content
Sign in to follow this  
Ahmed M Saleh

Speed target range in VNAV descent

Recommended Posts

Unfortunately the acceptable airspeed range for VNAV PATH with flaps up it's not modeled on NGX, I don't have T7. Maybe on the next version?


Br,

Vlad Tepes

I9-10900K CPU @ 5.0GHz, 64 GB RAM @ 3600MHz, NVIDIA RTX 3090

Share this post


Link to post
Share on other sites

I have the 777 and it is not modeled. I hope it will be in a next version as I really miss/love this feature.

Edited by Blaser

Share this post


Link to post
Share on other sites

Just open 2 tickets, otherwise nobody will know and would not get fixed.


Br,

Vlad Tepes

I9-10900K CPU @ 5.0GHz, 64 GB RAM @ 3600MHz, NVIDIA RTX 3090

Share this post


Link to post
Share on other sites

VNAV Speed Band (magenta)

Indicates the FMC target airspeed during VNAV PTH descents. The bottom of the bar indicates the autothrottle wake-up speed. The top of the bar indicates the speed at which VNAV will change VNAV PTH to VNAV SPD.

 

Its presence is dependent on whether they bother to code it and provide us with the option. We can only hope! 

In real world - optional on 737ng and 777. on 748 I think it's standard.

Edited by Copper.
  • Like 1

Brian Nellis

Share this post


Link to post
Share on other sites

Yep, on 748 is standard and when outside of top x bottom of airspeed range will change from PATH to SPD. Probably the same on 737 x 777. 

  • Like 1
  • Upvote 1

Br,

Vlad Tepes

I9-10900K CPU @ 5.0GHz, 64 GB RAM @ 3600MHz, NVIDIA RTX 3090

Share this post


Link to post
Share on other sites

VNAV and throttle behavior is correctly modeled.  The speed tape feature is an option that was not included, I suspect it is because it's not in widespread use maybe... just guessing.


Dan Downs KCRP

Share this post


Link to post
Share on other sites

First time I see this feature. Never even knew it existed, we don’t use it here.


___________________________________________________

Rafael Henrique Carelli

Share this post


Link to post
Share on other sites

I've never seen that option before.  It would help to know what FMC software version they have.


Joe Diamond

Share this post


Link to post
Share on other sites
5 minutes ago, JoeDiamond said:

I've never seen that option before.  It would help to know what FMC software version they have.

most likely 10.8a but can be implemented on 10.5 and higher i think depending on airplane status. It is a selectable option implemented via service bulletin. you'll see it in 748 if they implement the 748 vnav/ids faithfully


Brian Nellis

Share this post


Link to post
Share on other sites

Honestly, I don't see any useful need for that display.  It's just something else to clutter up the PFD.

  • Like 1

Joe Diamond

Share this post


Link to post
Share on other sites

Well, my opinion is it adds to the immersion since you can see how the "fmc is thinking"... Just good to have as a suitacheable option

Edited by Blaser

Share this post


Link to post
Share on other sites
12 minutes ago, JoeDiamond said:

Honestly, I don't see any useful need for that display.  It's just something else to clutter up the PFD.

I'm in 100% agreement. I think it came around when nav perf scales became a thing... Maybe it was needed/used during rnp ar proving period for vnav path to vnav speed awareness. That's my guess.

 


Brian Nellis

Share this post


Link to post
Share on other sites
1 hour ago, Blaser said:

Well, my opinion is it adds to the immersion since you can see how the "fmc is thinking"... Just good to have as a suitacheable option

You know how the fmc is thinking because as a rw pilot you‘re sitting in that cockpit every day and work with it constantly... you know how this airplane works, that‘s just like I don‘t need rpm or gear indication on my motorbike... I know how it will react from experience... the speed tape would just add another feature that makes you stop using your brain... 


,

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • 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.


    53%
    $13,405.00 of $25,000.00 Donate Now
×
×
  • Create New...