Jump to content

CWS mode for hand flying the 737 ?


Recommended Posts

Posted

Hello to everyone.When handflying my PMDG-737 I almost always engage CWS mode. I have found it's a fantastic way for easy aircraft control. You just select a pitch-roll attitude with the yoke and CWS maintains it. But I have two questions for you 737 experts:1.- Is CWS mode something similar to that "autotrim-flybywire" system in Airbus aircraft ?2.- Is CWS mode normally used in the real world to handfly the 737 ?Thanks. Jose Luis.CWS.png

  • Commercial Member
Posted

>1.- Is CWS mode something similar to that "autotrim-flybywire">system in Airbus aircraft ?No not at all. All that CWS does is maintaing pitch and bank. However the Airbus system does maintain a g-load and roll rate so you do not deflect elevator and ailerons directly with your stick but you command a g-load and or a roll rate and the system will then decide how much to deflect the control surfaces to achieve that. Yes autotrim is used as well but as you can see the system is much more complex. Let me know if you need further information.>2.- Is CWS mode normally used in the real world to handfly the>737 ?It depends on each pilot and or the airline on how much CWS mode is used. One of the nice things about CWS is that the airplane lies in the air very smooth as CWS is the only way to command a certain pitch to be held. LVL CHG is always chasing speed and pitching up and down, V/S is also pitching up and down to maintain the commanded V/S, but CWS is maintaining the pitch and just that. This can for example provide a smoother climb through rough wheather with lots of gust and turbulence and is prefered by some pilots in such conditions.This is just one advantage of CWS I wanted to point out. But how much it is really used for hand-flying depends on each pilot and the company's training and procedures.Hope this helps.Markus

Markus Burkhard

 

Posted

My today's PMDG-737 learning !!!Thanks very much Markus !!!Jose Luis.

Posted

I've always heard, at least in the US, that pilots frown upon CWS. A lot of carriers won't even install it, but maybe things have changed recently.

- Chris

Gigabyte Z790 Aorus Elite AX | Intel Core i9 13900KF | Gigabyte GeForce RTX 4090 24 GB | 64GB DDR5 SDRAM | Corsair H100i Elite 240mm Liquid Cooling | 1TB & 2TB Samsung Gen 4 SSD  | 1000 Watt Gold PSU |  Windows 11 Pro | Thrustmaster Boeing Yoke | Thrustmaster TCA Captain X Airbus | Asus ROG 38" 4k IPS Monitor (PG38UQ)

Asus Maximus VII Hero motherboard | Intel i7 4790k CPU | MSI GTX 970 4 GB video card | Corsair DDR3 2133 32GB SDRAM | Corsair H50 water cooler | Samsung 850 EVO 250GB SSD (2) | EVGA 1000 watt PSU - Retired

Posted

>I've always heard, at least in the US, that pilots frown upon>CWS. A lot of carriers won't even install it, but maybe>things have changed recently.Do you know any special reason for that ?Jose Luis

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
  • 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.
×
×
  • Create New...