Ive googled but can't find the answer sorry if it's a daft question........what does brake cut out / out or in do?
When the loco you are in is set to Cut-in this means the brake handle is active in your cab & will control the loco & the rest of the trains brakes. When the cab is set to Cut-out the brakes on that loco can be controlled by another loco usually the lead loco in duel/tripple or more workings.
The Class 66, does not have a cut in or cut out switch so to speak like the American locos. You would have to isolate the E70 in the engine room to isolate the locomotive brakes, or add another compatible locomotive via a multiway jumper cable to control both from one cab. Please feel free to ask anything else as I drive 66's.
Nope, you cannot cut in/out braking in the EM2000. You can only change the brakes between pass and goods braking mode on some of the locos. The cut in/out in the EM2000 is for traction motors.
On Eastcoast Way on the engineering scenario, the game has you walk to the rear DIT loco & set it to cut out, is this not correct? Is this not a setting for the brakes to respond to the pipe pressure?
No, nothing about the DTG Class 66 is correct. To isolate the braking system on the Class 66, so it responds to braking requests from another locomotive, you need to isolate what is called the E70, which is a valve in the clean air compartment of the engine room, where the compressor is situated. This diverts the air away from the brake control handle and basically turns the locomotive in to a 127 tonne wagon.