Jump to content

Sign in to follow this  
Guest bgahan

Lift_Scalar Question on the A319/A320

Recommended Posts

Guest bgahan

Hi All,There was a post sometime ago about adding lift_scalar 1.42 to the flaps 0 section in the aircraft .cfg file to improve approach attitude. My question is...if you play with this number, say drop it to 1.20 or 1.10, does that do anything to the attitude of the aircraft? Just curious, it seems with lift_scalar 1.42 under flaps 0 section I now get 2 degrees approach attitude. Isn't the 320/319 supposed to be approaching between 2.5 to 3.5 degrees?Thanks for the help!BrianKPHX

Share this post


Link to post
Share on other sites

Brian; Reducing the lift_scalar in the flap section will increase the pitch attitude for a given speed/descent gradient on final. The 2.5-3.5 deg nose up figure is for an on-speed flaps 3 or 4 approach established on a 3.0 deg glidepath. If the glidepath is steeper than 3.0 deg, the pitch will be lower. Speed control is also important...and remember also that computed V-Speeds are based off the acft gross weight, so if the ZFW you enter into the MCDU doesn't match what's in the aircraft.cfg, your speeds will be wrong as well.1.42 hits it pretty close to the mark for me.All that said...if the pitch seems too low, try lowering the scalar in increments of ~0.05 until it suits you!RegardsBob ScottATP IMEL Gulfstream II-III-IV-V L-300Washington, DC


Bob Scott | AVSIM Forums Administrator | AVSIM Board of Directors

ATP Gulfstream II-III-IV-V

System: i7-8086K @ 5.3GHz on custom water loop, ASUS Maximus XI Hero, 16GB 3600MHz CAS15, eVGA 2080Ti XC Ultra, Samsung 55" JS8500 4K TV@30Hz, 2x1TB Samsung SSD 970Pro NVMe+850 Pro SATA 3, eVGA 1KW PSU

SB XFi Titanium, optical link to Yamaha RX-V467, Polk/Klipsch 6" bookshelf spkrs, Polk 12" subwoofer, 12.9" iPad Pro, PFC yoke/throttle quad/pedals with custom Hall sensors, Coolermaster HAF932 case, Stream Deck XL button box

Share this post


Link to post
Share on other sites
Guest bgahan

Bob,Great feedback. Thanks. I'll give it a try. I'm not sure why I seem to be getting less than 2.5 degrees established on final.BrianKPHX

Share this post


Link to post
Share on other sites
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.


    13%
    $3,490.00 of $25,000.00 Donate Now
×
×
  • Create New...