Jump to content

Sign in to follow this  
jcomm

Trimming in MFS...

Recommended Posts

I find that trimming is still good-old force trim model, used for ages in MSFS, also in other platforms like XP until recently, War Thunder, etc..

I would have expected that at least this MODERN FDE could bring us a more detailed modeling of trimming.

Take aileron trim as an example. You add aileron trim to your aircraft ( provided it allows for it ) and, irrespective of being airborne, or standing still on the ground, with or without your engines working, with or without any winds set, you'll be able to see the associated control surfaces move, like if it was "force trim".

I didn't yet have the time to check if MFS also inherited from the previous MS FS versions the limitation of modelling elevator trim like "stabilator-like" airline style elevator trim ? Probably this hasn't changed either ?


Flight Simulation is the Virtual Materialization of a Dream...

Uninstalling flightsims is a temptation I can never resist...

 

 

Share this post


Link to post
Share on other sites
26 minutes ago, Ilari Kousa said:

Trimming is very difficult to model, as you don't have a force to trim against.

Very true, and there is an array of possible solutions to model it - just saying I prefer the approach that, for non-force-trim systems makes control surface displacement based on "q" ( dynamic pressure ).

 


Flight Simulation is the Virtual Materialization of a Dream...

Uninstalling flightsims is a temptation I can never resist...

 

 

Share this post


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

Which sim uses this?

Well,

DCS, IL2 Battle of Stalingrad, X-plane 11.50... I don't recall if Aerofly FS 2 does it too.

In any of these 3 sims, there's an option only for neutral point in terms of stick free vs stick fixed approaches to modelling the trimmed forces.

For aircraft that did have trim tabs, in any of these sims you can check that the control surface moves only when subject to duynamic pressure, either from propwash / jetwash, or a combination of this and / or airflow.

  • Like 1

Flight Simulation is the Virtual Materialization of a Dream...

Uninstalling flightsims is a temptation I can never resist...

 

 

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.


    39%
    $9,930.00 of $25,000.00 Donate Now
×
×
  • Create New...