There is provided a bridge which connects between a primary bus and secondary bus. The detection part makes the fluid visible by means of the additive or is provided with a detection substance changing its nature when contacting the fluid, thereby leakage of the fluid is detected. The processor is configured to determine a peak horsepower of the engine and a first rotational speed of the engine associated with the peak horsepower, and determine a peak torque of the engine and a second rotational speed of the engine associated with the peak torque. By locating an interferometer and light source at a receiver, the light passes through the interferometer both before and after the optical link to the transmitter. At least one of the vortex finder support flaps is connected to the support structure by a hinge. The rotor may be disposed radially outwardly relative to the stator and fixed for rotation with the driveshaft.