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Chapter 506 D-25 Auxiliary Power Unit

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    Before he finished speaking, Foss jumped up from his seat, supported the driver's seat with one hand, and moved his body close to the instrument display. Beckman quickly turned sideways to get out of the way, and at the same time pointed at the flashing icon on the display.  With the "223kw" number, the first reaction is whether the instrument display is wrong.

    But before he could ask the question, Hugh Wood, who was in the main pilot position, said, "We did another in-depth inspection of the aircraft this morning. Except for the damage to the tail, everything else is normal."

    Before he finished speaking, Hugh Wood also leaned forward and looked at the flashing degree. He couldn't help frowning, and then turned his head to look at Fox: "Sir, is this the APU provided by Ascendas Airlines? It seems better than  We imagined it was better.¡±

    Hugh Wood means what he says sincerely. As a pilot, he really wants to make the DC-10 he is flying fly again. Because of this, his performance requirements for the APU are stronger than anyone else.

    Because a powerful and reliable APU is not only the energy source for supply systems such as ventilation, air conditioning, electricity, boosting, hydraulic pressure, and engine starting of large aircraft, it is also the main source of emergency power for large aircraft in emergencies.

    In more than one passenger plane danger, APU has played a vital role in allowing the plane to land smoothly, creating several miraculous emergency landing records.

    As a senior large passenger aircraft pilot, Hugh Wood certainly hopes that the APU performance on the aircraft he flies will be as strong as possible, because this thing can not only improve the environment and service quality of the passenger aircraft, but also be a life-saving weapon at critical times.

    But what kind of APU has strong performance?  The most intuitive thing is of course that the greater the power, the stronger the performance.

    After all, the APU power compartment at the tail is only that big. The previous APU produced by Honeywell can only provide a maximum power of 218 kilowatts, and it cannot last for a long time. Under normal circumstances, it can only achieve a continuous power output of 196 kilowatts.

    Although it is enough for DC-10, compared with Boeing's ace Boeing 747, the effect of APU is still much weaker. After all, the APU equipped with Boeing 747 can achieve the secondary backup of the entire machine control system, but  DC-10 cannot fully connect all backups to the apu.

    The key reason why this is so is that the power of the APU is insufficient. As a result, the DC-10 can only connect the backup of major systems such as the hydraulic system, control surface control system, and life support system to the APU. As for the backup of other systems, it is connected to the battery carried by the aircraft.

    As a result, the design of the DC-10 is not only complicated. Once the main engine fails, the aircraft cannot quickly switch to backup control. Instead, several control switches need to be adjusted to complete the startup of all backup systems.

    This is nothing in normal times, but in a fatal air accident, one-button start and three-button and four-button start are really not a matter of time, but a fatal matter.

    Because of this, it is impossible to say that Hugh Wood does not envy the Boeing 747. He has also made suggestions to McDonnell Douglas. McDonnell Douglas also feels that this aspect needs to be improved in order to reverse the public's dissatisfaction with the safety of McDonnell Douglas passenger aircraft.  Good image.

    The problem is that McDonnell Douglas is determined to improve, but APU manufacturers such as Honeywell, General Motors, and Rolls-Royce are raising prices. If you want an APU, McDonnell Douglas, no problem, just give it a 15% premium.

    So before Hugh Wood and others flew this improved DC-10 to China, McDonnell Douglas was still wrangling with the supplier of an APU. No one knew when an agreement would be reached.

    Therefore, when Hugh Wood saw the numbers on the instrument display, he was still very happy, because he found that the numbers on the instrument display could be raised further, because the control valve on the hand of the co-pilot Beckman who controlled the APU was not pushed.  After all, this shows that the APU that was just replaced still has a lot of power left.

    The unspoken words of doubt did not make Fuchs feel unhappy, because at this moment he also noticed the connection between the valve in Beckman's hand and the degree on the instrument display, and immediately asked in surprise: "Isn't it the maximum power yet?  ?¡±

    Beckman did not answer, but looked at Hugh Wood aside with questioning eyes. Hugh Wood pondered for a moment, then nodded: "Push it to the end!"

    Hearing this, Beckman pushed the valve completely, and the number on the instrument display immediately jumped up, and soon settled at 252 kilowatts.

    ¡­¡­

    "Oh, my God, does Hugh Wood want the tail of the plane to blow up completely?"

    The two McDonnell Douglas technicians who assisted Master Ju and others to complete the installation and retreated to a distance to watch the test situation listened to the constant and harsh sound of the APU running, and couldn't help but feel anxious.

    Just now, the old technician who looked like a farmer nearby told them that what was installed was not the low-power APU pulled from the Shanghai assembly plant for use on the MD-82 aircraft, but was installed by Ascendas Aviation.  D-25 auxiliary power unit produced by the company.

    The two McDonnell Douglas Technicians who heard thisThe clerk almost didn't curse directly, and was about to turn around and go back to dismantle it, but found that it was already too late, Hugh Wood had already started it, so the two quickly picked up the walkie-talkie and prepared to notify Hugh Wood to stop quickly, because no one can guarantee Chinese products.  Will it explode in the next moment?

    But before they could call out, there was a sound of increased power coming from the tail of the plane. The two of them were so frightened that their faces turned pale, and they quickly hid far back. Then they stopped, and were about to take a breath and let Hugh  When Wood stopped, he saw the old technician named Ju smiling disdainfully at them.

    This made the two of them both hurt and crazy.

    "Let Hugh Wood stop first, and settle the score with the old guy later, and see if he can still laugh after a while." The fat technician said angrily.

    The technician with toad eyes quickly echoed: "Yes, they actually pretended to tell us such a big thing before telling us. I think they have no good intentions."

    As he said that, he picked up the walkie-talkie and was about to press the switch to speak, when he heard Fox's unquestionable voice coming from the walkie-talkie: "Is the APU just installed just connected to the engine's starting interface?"

    When they heard this, the two McDonnell Douglas technicians felt their hearts skip a beat. They wondered whether there was any problem found in the cabin, right?  The fat technician quickly explained: "Yes, Mr. Foss, but please listen to my explanation"

    "I don't want to listen to your nonsense. I'll find the technicians from Ascendas Airlines immediately. Half an hour after the APU is turned off in the cabin, all the aircraft's APU interfaces will be installed!"

    When the two people who were still thinking about how to word this heard this, their eyes immediately straightened. They immediately looked at each other and saw a line of words in each other's eyes. My ears are broken.

    After being stunned for several seconds, the two of them finally came to their senses and quickly grabbed the walkie-talkie to think about what was going on. Then they heard the walkie-talkie ring again: "Oh, by the way, the interface of the backup system is also connected. Well, that's it.  There¡¯s more, go and do it quickly, go, go, go!¡±

    When the two of them heard this, they both went, go, go. What else could they say? Just follow Mr. Foss's wishes. Just then, the old technician named Ju looked at them with pride again, but this time  The two McDonnell Douglas technicians were not angry at all. The technician wearing toad glasses immediately responded with a bright smile, then waved at Master Ju and shouted eagerly: "Mr. Ju, the test results just now are good, Mr. Foss  I hope to make some adjustments, connect all system interfaces, and conduct complete system testing."

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