Скачать или смотреть **“బోయింగ్ 737 తోక వద్ద రెండు రంధ్రాలు ఎందుకు?”**

Why do most airplanes only have one hole at the tail, but the Boeing 700 and 37 has two? Did engineers accidentally drill an extra one? Not at all. The first opening is easy to recognize. It's the exhaust outlet for the APU. The APU is a small jet engine built into the tail of the plane when the main engines are shut down at the gate. The APU keeps the aircraft powered. Here's what most people don't realize. When the APU is running on the ground, its exhaust temperature can exceed 1100 degrees Fahrenheit. If that heat can't escape fast enough, the APU will overheat. That's where the second hole comes in. It's a dedicated induced air cooling inlet. When the hot exhaust blasts out of the main outlet, it creates a low pressure zone around it. That negative pressure naturally pulls outside cool air into the second opening, washing over the APU and carrying heat away. Because of this clever design, a 700 and 37 can keep its APU running on airport ramps hotter than 100 and four degrees Fahrenheit, continuously supplying cabin air conditioning, while many other aircraft without this dualport cooling design must strictly limit APU operating time to avoid overheating. Pretty Clever. Isn't
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why does the boeing 737 tail have two holes? | apu cooling secrets
*description:*
ever noticed that the boeing 737 has two openings at its tail while most planes only have one? it’s not a mistake! learn how the second hole acts as a cooling inlet for the auxiliary power unit (apu), allowing the aircraft to run air conditioning on hot runways without overheating. discover the brilliant engineering behind induced air cooling.
*tags:*
boeing 737, apu exhaust, aviation engineering, aircraft tail, boeing 737 vs 747, auxiliary power unit, airplane mechanics, aviation facts, jet engine cooling, aerospace technology.
*hashtags:*
#boeing737 #aviation #engineering #apu #airplane #aerospace #avgeek #mechanics #flightfacts #techinnovation

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