Parking brake realistic mode

[remenkemi]

When in realistic mode, setting the parking brake still pulls the lever up and causes takeoff config warnings and the parking brake eicas message but doesn't brake.

Remember that the parking brake is just a physical lock that holds the pedals down, so if the pedals are not being pushed down while engaging the parking brake, the lever should just flip back to off rather than staying in the engaged position. zibo simulates this correctly.

so basically, when i press v (default parking brake keybind) it should always lift the parking brake lever. Whether it stays up or goes back down depends on whether the brakes are pressed. if not, it should just physically flip back to disengaged and not latch on engaged.

Additionally, in realistic mode, pressing the toe brakes while the parking brake is engaged should disengage it

I will verify all this on my 777 flight and let you know.

[remenkemi]

Ok so I confirmed this with pilots.

The procedure to set the brake is this:

1. press and hold toe brakes
2. pull and hold parking brake lever
3. release toe brakes
4. let go of parking brake lever

if you keep the brakes either pressed or released, the lever will just go back down. You have to release them while holding the parking brake lever up. And it will fall back down if your press the toe brakes while it's set. (because what keeps it engaged is the pedals pushing on the thing that's holds them down when the pb is set. so if that pressure is gone the spring will cause it to disengage)

So we could simulate this by connecting the v key directly to the parking brake lever so pressing v pulls it and releasing v drops it. We should replace the default command's functionality so keyboard configs dont get messed up.

[remenkemi]

so i looked at the code for this. honestly not sure waht the whole parking brake valve thing is about... all the parking brake lever does is hold the pedals down for you, so idk what valve this is referring to.

• easy mode: pressing V simply toggles holding the brake down

• realistic mode: pressing V holds the brakes only if they (the pedals) are already being held down while V is pressed. if they aren't, the parking brake lever will just fall back down and disengage itself. Also, pressing V to disengage does nothing - the pilot must press the pedals down to "unhook" the mechanism and release them to disengage.

I'm not sure how "strong" the parking brake should be though. that is to say, "how far down does it hold the pedals?"