4 ms·

-I guess the brakes need power to be disengaged against a spring force; this is quite common on electric motors in industrial use. So, power fails? It stops. Q

• joecool1029 5y ago
  I mean it's common in air brakes used in commercial trucks as well. If air pressure is lost the brakes close: That's the failure condition. Done likely because these vehicles are larger and hydraulic brake fluid runs the risk of boiling (air compresses unlike fluid) and/or catching fire. As for brake fluid and fires, I had a neighbor's Ford Explorer (more like Exploder?) catch fire while parked and it burned down to the chassis due to this: https://www.cozen.com/admin/files/publications/Motor_Vehicle_Fires.pdf https://www.cozen.com/admin/files/publications/Motor_Vehicle...
  • frosted-flakes 5y ago
    Also because running hydraulic brake lines to trailers is impractical.
    • joecool1029 5y ago
      Is it though? I grew up on a farm and we have had implements with detachable hydraulics.
      • frosted-flakes 5y ago
        Okay, less practical. Imagine trains had hydraulic brakes. Just another thing to go wrong.