The light beams travel through vacuum pipes and are delayed and combined optically, requiring a building 100 meters long with movable mirrors on carts to keep the light in phase as the earth rotates.
12.
In 1989 the 2.8 turbo diesels underwent a number of changes including timing chains instead of timing belts, square headlights and 4WD engagement in high range using an electric switch via a vacuum pipe.
13.
The guard had forgotten to connect the vacuum pipes when the locomotive coupled up to the opposite end of the train, so that extra brake power was not available on the falling gradient into Chester.
14.
Generally a manual boost controller will not be located within the cabin of the vehicle as the lengthy vacuum piping run between the turbo / wastegate & controller can introduce response issues into the system.
15.
Then light will exit the vacuum pipes in the Beam Combining Area ( BCA ), where the light will be directed into one of three permanent sensors, or to a temporary instrument on a fourth table.
16.
The backing pressure is rarely below 10 " 3 mbar ( mean free path H " 70 mm ) because the flow resistance of the vacuum pipe between the turbopump and the roughing pump becomes significant.
17.
Having just about had it with the beavers, Donald leaves and comes back with a tractor fitted with a vacuum pipe, which sucks in the sawdust through one end and ejects the sawdust into the trunk through another end.
18.
The harsh environment of the line, which runs adjacent to the sea for much of its length and is often soaked with salt spray, presented difficulties in maintaining the leather flaps provided to seal the vacuum pipes, which had to be kept supple by being greased with tallow; even so, air leaked in, reducing the pressure difference.
