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In the US it is commonly called a brake booster. A vacuum servo, also known as a power booster or power brake unit, uses a vacuum, usually supplied by the engine, to multiply the driver's pedal effort and apply that effort to the master cylinder .
Hemet then sold the C-130 to Hawkins & Powers. [3] At the time of the crash, the aircraft had logged 21,863 flight hours. [3] The NTSB investigated the crash and determined that the accident was caused by a structural failure that occurred at the wing-to-fuselage attach point, with the right wing failing just before the left.
Vacuum boosters provide brake assist for the driver by multiplying the force out of the booster creating more than the force that was used to push on the brake pedal. The booster works by pulling the air out of the booster chamber with a pump or other vacuum source (typically the engine's intake manifold [1]), creating a low-pressure system ...
This makes the tank slow down, even if the brake is not applied. If the tank is climbing, or in soft terrain, forward motion may stop entirely. Another disadvantage is that the brakes constantly dissipate vast amounts of heat when steering, which is very power-inefficient. The brakes suitable to steer a large vehicle are also impracticably ...
Exhaust brakes are simpler in operation than an engine brake.Essentially, the exhaust pipe of the vehicle is restricted by a valve.This raises the pressure in the exhaust system, forcing the engine to work harder on the exhaust stroke of its cylinders, so again the engine is acting as an air compressor, with the power required to compress the air being withheld from the exhaust pipe, retarding ...
Because of low vacuum at high RPM, reports of unintended acceleration are often accompanied by complaints of failed or weakened brakes, as the high-revving engine, having an open throttle, is unable to provide enough vacuum to power the brake booster. This problem is exacerbated in vehicles equipped with automatic transmissions as the vehicle ...
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The tanks were split into four groups of almost equal capacity, each normally feeding its respective engine, though cross-feeding was possible. The centre of gravity was automatically maintained by electric timers, which sequenced the booster pumps on the tanks.
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