DR400 Brakes



  • I am having a severe problem with the right brake. I am using PFC brakes which work fine on all other aircraft. Whenever I use the right brake the plane turns rapidly to the right. This is when I am just lightly touching the brake to keep the plane on a straight line. The left brake is working normally.

    I have a high end system and all other planes work normally. I have uninstalled and reinstalled the plane and the problem continues. Any thoughts would be appreciated.

    Tom Hibben



  • Hi Tom,

    Firstly, I do not see this problem - I've got saitek rudder pedals with the brakes assigned to axes on each pedal and a full press of left pedal gives exactly the same swing as a full press of right pedal. Neither is excessive.

    The entire brake section in the flight dynamics files is as follows:

    [brakes]
    parking_brake = 1
    toe_brakes_scale = 1.25

    That's it, nothing else. As you can see, there is no differentiation between left brake and right brake, and you say that the left brake works fine while the right is causing a problem.

    To go further, the entire brakes section of the SDK (so all possible brake references) has no possibility of splitting the brakes, other possible lines being auto_brakes, hydraulic_system_scalar, differential_braking_scale and parking_brake_linked_to_toe_brakes.

    I cannot think that any code would be affecting the behaviour of the brakes, as there's no code directly related to it and I believe it is a 'purely fde' item.

    Sorry not to be of any real use but that's at least something for you to work from - despite 'all other planes working normally', I suspect the problem lies somewhere in your setup.

    Cheers,
    Paul.



  • Paul,

    Thanks for the response. I will try and look further and make sure the numbers you listed are the same. Other than that I am not sure what to do.
    Tom



  • Paul,

    I just did some further checking and found the problem only is occurring when I am using P3Dv4. It works fine in FSX.

    Tom



  • Even more interesting, Tom - P3Dv4 is my primary sim, it's where I did most of the development and where I went to check!

    Really not sure what's going on there - have you tried assigning a key to left brake and to right brake to see if the application of full brake either side creates the same response as you are seeing through the axes?

    Cheers,
    Paul.



  • Paul,
    I am not sure what you mean by assigning a key to each brake. How would I do that? Sorry I am getting along in years old and don't understand things quiet so easily any more...grin

    Tom



  • Just go into the P3D 'Options' menu, down to the 'controls' section on the left and select 'Key Assignments'. In the right column now, only a very short way down from the top, are "Brakes (Apply Left)" and "Brakes (Apply Right)". Select the first and assign it a key, do the same for the second, then head into the sim and try out the left and right brakes using the keys you have selected.

    I'm curious to see if applying full brake without a controller axis gives you the same result as you see with your brake pedal.



  • It is getting late so I will do this tomorrow.

    Tom



  • Paul,

    I decided to stay up and work on it. The options menu already had Left* and the right-. I then took out both assignments and left them blank. It still wanted to turn hard to the right. I then assigned Left 0 and right 9. This seemed to work quite a bit better.
    I hope this helps to figure out what is wrong.

    Tom



  • Hi Tom,

    If, using the keyboard brakes (0 and 9 for you) the reaction is identical to the left and to the right then it confirms that the problem has to be with your pedals. There is nothing different being used in the aircraft between the brakes applied by the keys and the brakes being applied by the pedals - the aircraft is constant so the problem must lie with the external element.

    All I can suggest is that you recalibrate the brake axes on your controller and make sure that you don't have any unwanted profiles set that could cause left and right to work differently (particularly if you are using a registered copy of FSUIPC).

    Cheers,
    Paul.



  • And check that your right brake axis isn't somehow applying full right brake - operating like a keypress rather than a smooth axis.



  • @Delta558

    Hi Paul,

    I do have a registered FSUIPC. I also Have Precision Flight Controls.
    I will keep looking.

    Tom