CULTURAL QA 07-2023-26 Q1 Do planes always land with full flaps?
A1 Erika Fernandez,Experience in AviationField Jul 2 When it comes to landings, the use of flaps is a crucialaspect of aircraft operations. Flaps areaerodynamic devices located on the wings of an aircraft that can be extended orretracted to change the wing's shape and alter its lift and drag characteristics.While it's common forpilots to use flaps during landings, whether they are fully extended or notdepends on several factors. The decision to usefull flaps during a landing is influenced by various considerations, includingthe aircraft type, runway conditions, and the pilot's judgment. Full flaps increase the wing'ssurface area, generating additional lift and allowing the aircraft to maintaina lower approach speed. This can be advantageous when landing on shorter runways or insituations where a slower touchdown speed is desired, such as during landingsin adverse weather conditions. It's important tonote that using full flaps during landings may not be necessary in all cases. Some modern aircraft have thecapability to perform what is known as a "flapless" or"clean" landing. These aircraft, equipped with advancedaerodynamic designs and high-lift devices, can achieve a safe landing withoutdeploying flaps fully. Additionally, pilots may choose to adjust the flapsettings based on factors such as wind conditions, aircraft weight, and runwaylength. So, the next time you're on a plane and preparing fortouchdown, observe the wing's configuration and remember that the use of flapsis a dynamic aspect of aviation that adapts to different scenarios.Safe travels, and enjoy your flights! Q2 Why is Airbus more successful thanBoeing? A2 Vishnu Ravi, Aerospace Engineer |Aviation Enthusiast & Content Creator Jun 22 When it comes tosuccess in the aviation industry, Airbus clearly takes the lead over itscompetitor, Boeing, and for several compelling reasons. First and foremost,profitability sets the two companies apart. While Airbusis thriving and generating healthy profits, Boeing is facing the challenge ofbeing unprofitable. In particular, Boeing's Defense division isburdened by significant losses, and unfortunately, it seems that these problemsare here to stay for the foreseeable future. Moreover, thenumbers speak for themselves. Over the past four years, Airbus hasconsistently outperformed Boeing in terms of orders and deliveries, solidifyingits position as the top airplane manufacturer. In 2022 alone,Airbus impressively delivered 661 planes and secured orders for a staggering1,078 aircraft. In contrast, Boeing trailed behind with only 479 jets deliveredand 774 orders received. Although bothcompanies produce comparable aircraft, the fleet performance factor givesBoeing enthusiasts a reason to cheer. Pilots often express a preference for Boeing planes due to their superiorcontrol feedback and reduced reliance on automation. This gives them asense of mastery and confidence while navigating the skies. Additionally,revenue plays a crucial role in determining success, and here Airbus has takenthe lead. In 2019, Airbus dethroned Boeing as the largest aerospacecompany in terms of revenue, primarily due to the unfortunate grounding of the Boeing737 MAX. Lastly, bothAirbus and Boeing harness advanced technology to enhance their products'performance, with a particular emphasis on weight reductionand fuel efficiency. This commitment to innovation ensures that bothmanufacturers remain at the forefront of aviation advancements. To summarize,Airbus undeniably surpasses Boeing in terms of success, boasting profitability,impressive numbers of orders and deliveries, and remarkable revenue. While both companies produce competitive aircraft, Boeing gains an edgewith its pilots' preference for increased control and feedback. By continually pushingthe boundaries of technology, both Airbus and Boeing strive to shape the futureof aviation, but for now, Airbus reigns supreme Q3 If Earth were truly a globe, wouldairline pilots constantly have to adjust their controls so as not to fly offinto space? A3 Vishnu Ravi,Aerospace Engineer |Aviation Enthusiast & Content Creator Jul 19 Rest assured,airline pilots do not find themselves engaged in a perpetual struggle toprevent their aircraft from ascending into the boundless expanses of space dueto the Earth's curvature.Allowme to elucidate this matter for you. At cruising altitudes, the curvature of the Earth ispractically imperceptible, posing no disturbance to the flight trajectory. When uninhibited, aircrafteffortlessly conform to the innate curvature of our planet. You see,aircraft are meticulously calibrated to the specific air density theyencounter. As a result, they tend to maintain a consistent altitude withoutmuch intervention. While pilots domake subtle adjustments to account for the Earth's curvature, these changesoccur so gradually that they go unnoticed, seamlessly absorbed by the aircraftitself. It is indeedaccurate that the Earth's curvature causes an 8-inch drop for every miletraveled. However,this phenomenon does not necessitate substantial altitude adjustments duringflight. The aircraft gracefully adheres to the Earth's curvature,and pilots simply maintain a steady altitude based on a reliable referencepoint, such as sea level. Furthermore, thereis no need for aircraft to compensate for the Earth's rotation. The planet's rotation remains constant in both speed and direction atany given latitude, eliminating the necessity for continuous adjustments. In conclusion, letme assure you that airline pilots do not find themselvesconstantly wrestling with their controls to prevent an interstellar journeycaused by the Earth's curvature. The curvature isinconspicuous at cruising altitudes, and aircraft effortlessly align themselveswith the Earth's natural shape. My note- Agood answer to the curious question for persons like me. Q4 Which gas is used in AC? A4 Mcleodproducts, Business Consultant |Digital Marketing Services | IT GuruJul 11 The gas used in airconditioners, commonly referred to as AC, is known as arefrigerant. Refrigerants are substances that undergo athermodynamic cycle to transfer heat from one location to another, thusallowing air conditioners to cool the air in a given space. Over the years, differentrefrigerants have been used in AC systems, with the most common onesbeing chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), andhydrofluorocarbons (HFCs). In the past,CFCs, such as R-12 or Freon, were widely used in air conditioners.However, it was later discovered that CFCs contribute to the depletion of theozone layer, which led to the adoption of more environmentally friendlyrefrigerants. As a result, HCFCs, like R-22, were introduced astransitional alternatives. However, HCFCs still have a negative impacton the ozone layer, albeit to a lesser extent than CFCs. In recentyears, there has been a global shift towards the use of HFCs as refrigerants inAC systems. HFCs, such as R-410A, R-134a, and R-32, have a significantly lowerimpact on the ozone layercomparedto CFCs and HCFCs. They are classified as ozone-friendly or non-ozone-depletingsubstances. The most commonly used HFC in residential andcommercial air conditioning systems today is R-410A. R-410A is ahydrofluorocarbon blend that has become the preferred choice for new AC systemsdue to its excellent cooling properties and environmental friendliness. It hasa higher cooling capacity and is more efficient than older refrigerants likeR-22. Additionally, R-410A has a zero ozone depletion potential, meaning itdoes not contribute to the depletion of the ozone layer. This makes it a moresustainable and environmentally responsible option for cooling applications. Anothercommonly used HFC refrigerant is R-134a. It is predominantly used in automotiveair conditioning systems and some smaller residential air conditioners.R-134a is also non-ozone-depleting and has a relatively low global warmingpotential (GWP) compared to other refrigerants. However, it is worth notingthat although HFCs have a lower impact on the ozone layer, they are stillgreenhouse gases and contribute to climate change. In someregions, there are ongoing efforts to phase out HFCs in favor of even moreenvironmentally friendly alternatives. These alternatives includenatural refrigerants like hydrocarbons (propane, isobutane) and carbon dioxide(R-744). Natural refrigerants have negligible or zero ozone depletion potentialand significantly lower global warming potentials compared to HFCs. However,their adoption in air conditioning systems is still limited due to safetyconcerns, infrastructure requirements, and regulatory barriers. It is important tomention that the choice of refrigerant used in an air conditioning systemdepends on various factors, including the type and size of the AC unit, itsintended application, environmental regulations, and safety considerations.Manufacturers and HVAC professionals ensure compliance with regulatory standardsand guidelines when selecting and handling refrigerants. Insummary, the gas used in air conditioners, or refrigerants, has evolved overthe years to become more environmentally friendly. The transition from CFCs toHCFCs and, ultimately, to HFCs has significantly reduced the impact on theozone layer. The mostcommonly used refrigerants in AC systems today are HFCs like R-410A and R-134a.These refrigerants provide efficient cooling while having aminimal impact on the ozone layer. Additionally, there is ongoing research anddevelopment to explore even more sustainable alternatives, such as naturalrefrigerants. Q5 How deep is the deepest part of theBlack Sea? A5 Rebecca Williams, MS in Accounting andFinance, New York University14h The deepest part of the Black Sea is theEuxine abyssal plain, which reaches a maximum depth of 2,212 meters (7,257.22feet). Thisdepth is located just south of Yalta on the Crimean Peninsula. The Euxine abyssal plain is a flat and featurelessarea that covers about 28 percent of the Black Sea floor. It is formed bysediments that have accumulated over millions of years from the rivers thatflow into the sea, such as the Danube, Dnieper, and Don.The Euxineabyssal plain is also the site of a unique phenomenon: an anoxic layer of waterthat contains very little or no oxygen and is therefore uninhabitable for mostmarine life. The anoxic layer ofthe Black Sea is caused by the stratification of water masses with differentdensities and salinities. The upper layer of water is less dense and lesssaline than the lower layer because it receives fresh water from rivers andprecipitation. The lower layer of water is denser and more saline than theupper layer because it comes from the Mediterranean Sea through the Bosporusand the Dardanelles straits. The two layers do not mix easily becauseof their density difference, creating a permanent boundarycalled the halocline at about 150 to 200 meters (490 to 660 feet) depth. Belowthe halocline, there is not enough oxygen for most organisms to survive, exceptfor some bacteria that can use other chemicals such as hydrogen sulfide ormethane as energy sources. The anoxic layer of the Black Sea hassome advantages and disadvantages for humans. On one hand, it preserves ancient shipwrecks that have sunkto the bottom of the sea, because there are no organisms that can decomposethem or damage them. Some of these shipwrecks date backto thousands of years ago and provide valuable information about the historyand culture of the civilizations that sailed on the Black Sea. On the other hand, it limits thepotential for fishing and aquaculture in the Black Sea, because there are fewer species and habitatsavailable in the deeper waters. All the above QA are from Quora website on 26-07- 2023. Quora answers need not be 100% correct answers . Compiled andposted by R. Gopala krishnan, on 26-07-2023 -- You received this message because you are subscribed to the Google Groups "Thatha_Patty" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/thatha_patty/668000064.3601288.1690338907286%40mail.yahoo.com.
