# Introduction Differential and Progressive brakes for X-Plane (aka "D\&P brakes") is a plugin that offers differential and progressive braking capabilities to X-Plane 11 & X-Plane 12 users. It is natively recognized and supported by [Reality Expansion Pack (REP) from SimCoders](https://www.simcoders.com/). It recognizes and supports the following aircrafts: * Zibo 737-800 * Toliss A319 * Toliss A321 * TOGA Simulations MU-2 Marquise ### Description In X-Plane 10 there was the possibility to use two buttons to simulate left and right toe brakes.\ In X-Plane 11 these commands have been removed and X-Plane 11 & 12 tries to simulate the differential brake action in a not so efficient way.\ Purpose of this script is providing the user custom commands similiar to those available in X-Plane 10. **What do you mean when you say** "***X-Plane 11+*** ***tries to simulate the differential brake action*****"?** Whenever you use the rudder, X-Plane 11+ applies a braking force on the related (left or right) tire.\ I've observed that: * This seems to happen below 50 kts * The force applied is almost 100% at very low speed and tends to be much less at speeds near 50 kts This means that: * You will have problems trying to taxi since the plane will be prone to stop. * You will have problems during the takeoff roll below 50kts because a braking force will be applied even if not requested You can observe this behaviour using the dataref editor. * Choose the "Show Datarefs" option from the plugin menu * Watch what happens to the following datarefs: * ***sim/cockpit2/controls/left\_brake\_ratio*** * ***sim/cockpit2/controls/right\_brake\_ratio*** --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://marangonico.gitbook.io/differential-and-progressive-brakes-for-x-plane/master.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.