Aircraft Crash Survival Analysis and Design Essay Example for Free

Aircraft Crash Survival Analysis and Design Essay 1. Describe the effect plowing can have on crash forces when the impact surface is soft soil. Earth gouging and scooping of soil occur when the structure makes initial contact with the ground which minimize the acceleration and force levels to which the structure is subjected. Soft soil can cause plowing and rapid deceleration if there is a large horizontal velocity component. A high-speed longitudinal impact into water can also cause high loads from water plowing as water enters through lower nose transparencies. Reducing the earth scooping effects encountered in longitudinal impacts should include a large, relatively flat surface thereby increasing the aircrafts tendency to slide over the impact terrain and by minimizing inward buckling of the fuselage nose or engine nacelle to maintain skid surface integrity. 2. Explain the term submarining in respect to the use of lap belt restraints. What human injuries may result? This is where the lap belt rides over the pelvic brim and compresses the soft tissues of the abdomen resulting in serious abdominal and spinal injuries. Submarining occurs due to the pelvis rotating under the lap belt, usually due to inappropriate location of the lap belt anchors or due to poor design of the seat bottom or a combination of both. Lap belt only restraints so commonly inflicted serious injuries on users in automobile crashes that the medical community coined a new term, â€Å"the seat belt syndrome†, to describe  the constellation of injuries caused by submarining under the lap belt. ftp://ftp.rta.nato.int/pubfulltext/RTO/EN/RTO-EN-HFM-113/EN-HFM-113-06.pdf 3. Discuss forward and rearward facing passenger seats and explain which you feel may be an advantage in crash survivability. The rearward-facing seat is optimal for providing maximum support and contact area in longitudinal impacts. The only critical impact sequence for the rearward-facing seat is one that involves a severe lateral component that allows sideward movement of the occupant prior to application of the longitudinal or vertical Pulse. However, lateral torso movement can be minimized by use of a torso restraint system of much lighter weight than that required for other seat orientations. The rearward-facing cabin seat is preferred. 4. Explain the concept and intention of Delethalization of Cockpit and Cabin Interiors. The delethalization of cockpit and cabin interiors is the design and set up of aircraft cockpits and cabins to prevent injury on impact. This is done by ensuring the occupants immediate environment be designed so that when the body parts do flail and contact rigid or semi-rigid structures, injury potential is minimized. This can be done in different manners. First is to relocate the hazardous structure or object out of the occupants reach or the hazard might be reduced by mounting the offending structure on frangible or energy-absorbing supports and applying a padding material to distribute the contact force over a larger area on the body member. The aircraft interior has occupant strike envelopes, meaning that there are hazards that are more conducive to occupant injury than others. Overall the intent is to protect the head and torso first to prevent debilitating injuries or death and then protecting the lower body parts to ensure the area hazards are clear of tripping hazards or anything that could prevent rapid escape. Typical contact hazards in the cockpit area include window and door frames, consoles, controls and control columns, seat backs,  electrical junction boxes, glare shields, and instrument panels. Contact hazards commonly found in aircraft cabin areas include window and door frames, seats, and fuselage structure. Use of suitable energy absorbing padding materials, frangible breakaway panels, smooth contoured surfaces, or ductile materials in the typical hazard areas mentioned is recommended to reduce the injury potential of occupied areas. The use of protective helmets is also recommended in certain types of aircraft. 5. Explain the expected advantage frangible fuel system attachments can provide as an aircraft post-crash survival technique. Frangible Attachment- An attachment possessing a part that is designed to fail at a predetermined location and/or load. Frangible structures or frangible bolts should be used at all attachment points between fuel tanks and aircraft structure to prevent fuel tank components from being torn out of the tank wall during impact. Frangible attachments should be used at other points in the flammable fluid systems where aircraft structural deformation could lead to flammable fluid leakage. This increases the survivability by containing any remaining fuel to the tank its encapsulated within and reducing the chance of a fire being spread throughout a crash site or into the cabin. 6. What are some of the key concerns when selecting aircraft interior materials form a crash survivability perspective? All aircraft interior materials such as seat fabrics and cushions, interior wall insulations, and nonmetallic structural components must be flame resistant and produce the least amount of smoke and toxic gases possible. 7. Describe some of the key points of post-crash design criteria associated with oil and hydraulic systems. Oil and hydraulic fluids are easily ignited and can serve as ready ignition sources for fuel meaning fluid spillage should be prevented. Oil tanks and  hydraulic reservoirs should not be located where spilled or sprayed fluid can readily be ingested into the engine or ignited by the engine exhaust. Oil tanks and hydraulic reservoirs should not be located near the bottom of the fuselage, in or above engine compartments, in electrical compartments, in occupiable areas under, in front of, or at the side of heavy masses, such as engines and transmissions, nor above landing gears Oil and hydraulic lines should consist of flexible hoses with steel-braided outer sheaths and for high-temperature; coiled metal tubing should be used. Lines should not be routed, near the bottom of the fuselage, over landing gears, under, in front of, or at the sides of heavy masses, such as engines and transmissions, in the leading edges of wings, in areas of anticipated rotor blade impact, in any area where flammable fluids could be spilled or sprayed onto hot surfaces or ingested into the engine or above electrical wiring 8. Considering aircraft electrical system post-crash survivability design, what are the guidelines concerning routing electrical wires in the vicinity of flammable fluid lines? Wiring is a prime ignition source for leaking oil, fuel or hydraulic fluid leaks or vapors. To aid in crash survivability wires should be routed above or away from flammable fluid lines and they should never be closely spaced between outer skin and fuel lines. Wires must not be routed near flammable fluid tanks unless the wires are shrouded to prevent arcing. Wires should not be routed near the bottom of the fuselage, over landing gears or in the leading edges of wings. 9. What G forces are experienced if an aircraft impacts the ground at a speed of 120 MPH and skids along the ground 50 feet before coming to rest? 9.8 G’s. 120^2/50 = 14400/50=288288x.034=9.79 10. Explain why you believe passenger airlines do not have to utilize passenger shoulder harnesses as a crash survival precaution. The passenger shoulder harness is not used for crash survival because: *  The cost of the harnesses for one would be huge to retrofit all the airliners in the fleet today and that cost would be put onto the customer. * The need for various sizes; very small through very large would result in further cost. * Comfort, if people are not comfortable then they will not have a good flying experience while others may have a fear or feeling that they are trapped. * The ability to understand how to use the shoulder harness. Most cannot figure out how to wear the harness which would delay taxiing and flight times. The required ability to quickly restrap in bad weather or to unstrap in an egress situation could be deadly. * Americans don’t like to be told what they have to do†¦.they are the paying customer.

The Band Creed Essay -- Music Christianity Bands Papers

What If The band that comes to my mind when someone mentions abstract lyrics is the modern, popular, yet sophisticated group, Creed. I thoroughly enjoy their music, although not strictly for entertainment purposes. They have extremely creative ways of stating feelings, telling stories, and sharing ideas through the lyrics they produce. Their song, entitled "What If," is an excellent version of poetic writing that exemplifies mixed emotion and portrays an undefined depth in meaning. It is quite possible to interpret this particular song differently according to the listener's point of view and the personal background experiences that may influence their portrayal of the music. However, I see certain parallels to the Bible story of Jesus praying to God on the Mount of Olives. There are several lines that suggest the connotation of how fearful, anguished, and lonely Jesus felt before he was crucified. The very first verse is definitely the context of Jesus' pleading words of prayer to God shortly before he was betrayed and arrested. He was certainly in a state of depression, acutely aware of the fleeting minutes of freedom left for him on earth. The intense dread Jesus felt must have been overwhelming to him as he obediently kneeled in submission to God's will, desperately trying to understand His reasoning. At this particular time in the pre-crucifixion, it is only logical to associate the tremendous burden Jesus was going through with his great frustration of human ignorance and sin. Thus, the meaning of "not finding rhyme in reason, losing sense of time and seasons, and feeling beaten down, by men with no grounds," is explained to clarify the starting point of my interpretation. In the second set of phrases, the first two... ...e words of men who have no grounds I can't sleep beneath the trees of wisdom When your ax has cut the roots that feed them Forked tongues in bitter mouths Can drive a man to bleed from inside out What if you did? What if you lied? What if I avenge? What if eye for an eye? I've seen the wicked fruit of your vine Destroy the man who lacks a strong mind Human pride sings a vengeful song Inspired by the times you've been walked on My stage is shared by many millions Who lift their hands up high because they feel this We are one We are strong The more you hold us down the more we press on What if you did? What if you lied? What if I avenge? What if eye for an eye? I know I can't hold the hate inside my mind 'Cause what consumes your thoughts controls your life So I'll just ask a question What if? What if your words could be judged like a crime?

Research Paper Topics Essay

It is confusing on, but this is often even an issue in America today. Let’s see the topic. The first thing is â€Å"illegal†. Ineligible is all you have to be compelled to need to frame your mind on the issue! These people square measure breaking the law. They sneak into this country illicitly and live here, most of them committing various crimes in addition, and take jobs and housing from the national folks that work and provide for themselves and their families’ argument. however if they will work blue-collar jobs and do labor, I’m positive they will muster the strength to elevate hands to fill out citizenship applications and devour a book to be told English and yank history. Anyone United Nations agency is throughout this country illicitly, unless they are unfinished citizenship approval, have to be compelled to be straightaway deported, no queries. If it is nice, people is not an issue, some may okay be, but they are BREAKING THE LAW. Recently there was a story among the news some lycee kid in town, Arizona United Nations agency went into school. He was a freshman, and had been management back once or twice. once his family was referred to as in to the Principal’s geographic point to dialogue the case it completely was discovered that they were here illicitly, and had been for 6 years. Immigration was referred to as and conjointly the family was deported. Good. But, presently we’ve migrant â€Å"rights† activists protestant regarding but it wasn’t honest to the rest of the family. square measure you kidding me? I mean, come on. OK, sure, the fogeys weren’t those caught with associate ineligible drug, but they were living here illicitly for 6 YEARS! On-top-of-which, it’s not like pot is also a drug that’s alone ineligible in town, it’s a FEDERAL LAW! One migrant â€Å"rights† activist (I place â€Å"rights† in quotations as a results of i don’t understand but one can have the rights of associate yank if they are not one) expose the sickly, stupid argument of fogeys weren’t, have to be compelled to the fogeys are still left? Entirely altogether totally different situation, but, YES! I see where this half-wit is strolling back from though, but still, he forgets that just because they’d not be breaking the pot law, they are still breaking the immigration one! last, ineligible immigrants square measure criminals. they have to be compelled to be treated intrinsically. it’s wisdom, people.

The Controversy Over Zoos And American Culture - 998 Words

What was at one time used to show off wealth and power is now seen as a symbol of sadness and disgust, despite the many minds it blesses with wonder (Adwait- Kulkarni). Today there are huge controversies over Zoos and whether they are inhumane or not. There are also controversies about the United States of America and other countries. Many comparisons can be drawn between a Zoo and American culture. We go out to look at animals that are trapped in a place they have no control of, but could we really be looking at ourselves? We as Americans tend to get stuck in our everyday routines. We get up, eat, go to work or school, and come home, all so that we can do the same thing again the next day. Doing the same thing is a dangerous and unhealthy habit, much like not being in your natural habit. We take the same worn down roads, read the same ancient words, and do not get to really fully experience what else is out there for us because in America we are confined. Many people just do not thi nk that there is really anything else out there for them to see so the make the claim and stick with the mantra that America is the greatest country. We go to work to get paid so that we can feed ourselves and families, and we go to college to get a well-paying job to provide for our future families. Americans’ are trapped in the system because these days we do not know any other way, and we have to do these things to keep acting as providers. â€Å"Down the ages too men have been impressed by theShow MoreRelatedCloning Endangered Species Essay1178 Words   |  5 Pagesplaced in a chemical culture to jumpstart the cell’s growth, just like fertilization in nature. The cells develop into embryos which will be transplanted into a surrogate mother and born like a normal baby (Three Ways†¦Ã¢â‚¬ ). Frozen zoos collect sperm, cells, and other tissues of endangered and even extinct animals and are important to the success of saving endangered species (Hembree). 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