This special gas turbine / turbocharger can also work independently from the main engine as an ordinary APU.

Aircraft APU generally produce 115V at 400 Hz ( rather than 50 / 60 Hz in mains supply ), to run the electrical systems of the aircraft ; others can produce 28V DC.

Aircraft with APUs can also accept electrical and pneumatic power from ground equipment when an APU has failed or is not to be used.

An APU can save up to 20 gallons ( Cat 600 – 10 hours downtime @ 2 gallons per hour idling ) (≈ 76 litres ) of fuel a day, and can extend the useful life of the main engine by around 100, 000 miles (≈ 160, 000 kilometres ), by reducing non-productive run time.

The APU generator engine is a fraction of the main engine's size and uses a fraction of the fuel ; some models can run for eight hours on one US gallon (≈ 4 litres ) of diesel.

The generator also powers the main engine's block and fuel system heaters, so the main engine can be started easily right before departure if the APU is allowed to run for a period beforehand.

The SNES contains a sound module called APU ( Audio Processing Unit ) which is almost completely separate from the rest of the system: it is clocked at a nominal 24. 576 MHz in both NTSC and PAL systems, and can only communicate with the main board via 4 registers on Bus B.

Since the module is mostly self-contained, the state of the APU can be saved as an. SPC file, and can be emulated in a stand-alone manner to play back all game music ( except for a few games that constantly stream their samples from ROM ).

It needs be considered that from a purely technical point of view, there is no reason why onboard sound from motherboards without the nForce APU and SoundStorm certification cannot reproduce non-processed sound such as an MP3 or CD without effects applied, as well as can a SoundStorm certified nForce2 motherboard.

Each APU is loaded with its apulet by the PE and can pass its results to the next APU.

APU strongly urges all of its students to use FastWeb and other scholarship data bases and apply for as many as they can.

Before engines are to be turned, the APU is started, generally by a battery or hydraulic accumulator.

If the APU or its electrical generator is not available, the aircraft cannot be released for ETOPS flight and is forced to take a longer non-ETOPS route.

Landing could be accomplished with only one APU working.

A refrigerated or frozen food semi trailer or train car may be equipped with an independent APU and fuel tank to maintain low temperatures while in transit, without the need for an external transport-supplied power source.

By using the APU ( powered by a turbine ) to energize a Chorus electric motor mounted in the landing gear for ground movement, aircraft will be operating in a hybrid configuration where the main engines are used only for take off, landing, and flight.

The Topol-M may be deployed either inside a reinforced missile silo, which is reported to be able to withstand a direct nuclear hit or from a APU 15U168 launcher mounted on the MZKT-79221 " Universal " 16-wheeled transporter-erector-launcher.

There will be a mechanic in the flight deck ' riding the brakes ', who communicates with ATC ground control ( for movement clearance ), and operates of the APU (" auxiliary power unit "), brakes, lights, while the agent will operate the tow-tractor.

Though an EMP could be used and every Machine in its range instantly disabled, the defensive grid, APU fighters and virtually every piece of defensive hardware in Zion would be permanently disabled as well, leaving the city with no way to defend itself during a second Machine incursion.

If the engines had been turned off, they could not be restarted again due to the unservicibility of the APU and lack of external power.

Similar to shore power for ships, a ground power unit ( GPU ) may be used to supply electric power for an aircraft on the ground, to sustain interior lighting, ventilation and other requirements before starting of the main engines or the aircraft auxiliary power unit ( APU ).

The councils advise schools on matters such as provision of workplace training courses, equipment purchase and training of supervisors in APU.

An auxiliary power unit ( APU ) is a device on a vehicle that provides energy for functions other than propulsion.

Once the APU is running, it provides power ( electric, pneumatic, or hydraulic, depending on the design ) to start the aircraft's main engines.

Diesel-powered APU on truck

An electric APU installed on a truck

The orbiter's toilet malfunctioned on first use resulting in, according to Lousma, " eight days of colorful flushing "; one Auxiliary Power Unit ( APU ) overheated ( but worked properly during descent ); both crew members experienced some space sickness ; and on 26 March, three communications links were lost.

On 22 October 1989, an alarm woke the shuttle crew when the gas generator fuel pump system A heaters on Auxiliary Power Unit ( APU ) 2 failed to recycle at the upper limits of the system.

This caused minor tears in two dozen insulation blankets mounted on the bulkhead between the payload bay and the AFT near the # 3 APU.

When the three smaller Alaska colleges ( UAS, APU and Sheldon Jackson ) all shut down their sports programs in 1990, leaving just the University of Alaska Anchorage and University of Alaska Fairbanks with intercollegiate athletics programs, it had an impact on the UAS campus, Griffin said.

Bleed air for starting is provided by an on board auxiliary power unit ( APU ) or an external huffer if the APU is inoperative.

Because the aircraft has no bleed air powered engine starters, and no requirement for bleed air for cabin pressurization during flight, there is no need to have the APU drive a load compressor to supply bleed air to the aircraft during a period of engine loss, or on the ground at the start of each flight.

A fault model in an Aerospace context is a set of structured information which helps users or systems to identify and isolate a problem that occurs on an engine, Line-replaceable unit ( LRU ), or Auxiliary power unit ( APU ) during a flight.

SoundStorm was an advanced integrated 5. 1 sound technology certification developed by Nvidia for the nForce and nForce2 platforms based on the nForce audio processing unit ( APU ).

The DSP on the APU was normally driven by code largely derived from the 3D audio middleware company Sensaura.

Due to their fuel flexibility they may run on partially reformed diesel, and this makes SOFCs interesting as auxiliary power units ( APU ) in refrigerated trucks.

APU is located at Jumonjibaru in the City of Beppu, Ōita Prefecture on the island of Kyushu.

Most of the classes in APU are carried out on a quarter system.

Compressed air is also obtained from the auxiliary power unit ( APU ), if fitted, in the event of an emergency and for cabin air supply on the ground before the main engines are started.

A medical building is also located on the APU campus, the Spinal Institute.

This is contributed to the fact that Ritsumeikan Asia-Pacific University ( APU ) in Beppu accepts many foreign students.