Jump to content

Sign in to follow this  
JSACKS

What IS speed intervention ?

Recommended Posts

How does SPD INTV work? I mean, maybe, why does it exist? If you have VNAV and also SPD/VS, and also LVL CHG, what is the purpose of SPD INTV? When would you typically use it?Thanks!Jonathan


Jonathan Sacks

Dell XPS Gen 4, Pentium IV Northwood extreme 3.8Ghz, 3Ghz RAM, eVGA 7900 GTO,

12 GoFlight modules plus MCP-PRO AP and EFIS, GF pedestal, CH rudder pedals,

CH throttle quadrant, 42" LG LED, 24" DELL LCD, Windows XP, FS2004, FSUIPC 3.96

FS Autostart 1.1 (Build 11), FS Navigator 4.6, UT, FE, GE, REX, PMDG, Level-D, PSS, etc.

Share this post


Link to post
Guest JamieG

In a nutsheel, Speed/Alt intervention is when you need to intervene in the VNAV (spd and/or alt) profile. (lol sorry couldnt resist). I'm sure you have noticed how the FMC calculates certain speed/alt restricitons/and expected crossings. However, I'm sure you've noticed with ATC--esp MS ATC that you will rarely be able to follow the FMC exactly. SPeeD/ALTitute INTerVention is used when ATC tells you to do something other than the FMC wants--without needidng to completely exit VANV.Sorry, I know that was confunsing and wordy. For example, if you are flying along and ATC tells you to slow to 250. You hit speed intv and dial in 250, and the plane will now slow to 250 but you can keep the VNAV profile.I believe that is how it works, but coorect me if i am wrong. I usually use ALT INTV b/c ATC usually never allows me to follow the profile.

Share this post


Link to post

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.


    2%
    $540.00 of $25,000.00 Donate Now
×
×
  • Create New...