Posted by: iknowwho | December 16, 2008

aerodynamics of airplane

anything about aerodynamics force working in an airplane. for an instance, this lesson tell about how an airplane can fly and the important thing to do in order the plane can fly easily.

aerodynamics deals with 2 force only; Lift and Drag (L&D). all aerodynamics people’s goal is to make Lift as high as possible and Drag as low as possible. they want L/D at maximum value. then the airplane reach its perfect.

the problem in the real life about aerodynamics forces is Drag always be there. Drag can’t be nullifies because every single thing moves in the air will get drag force. on the other hand, Lift force may have no effect on the body moving in air. so those are the work for aerodynamics people. they have to make a moving body in the air that can generate Lift as high as possible and generate Drag few only.

after all aerodynamics peoples are the men behind the flying thing. great peoples and great work they do and great things they make. centuries ago peoples could only  imagine they can fly like birds, but today, because of aerodynamicyst, flying is no dream any more.

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Posted by: iknowwho | December 15, 2008

lightweight structural analysis

one of lesson in aerospace that explain about structure in airframe..

it explains that one aircraft can fail if load accepted by structure more than material can hold. it’s simple ; we just need to calculate the stress on airframe(aircraft structure) then compare with stress that can hold by the structure and material. for example if the airplane wing made from AL 7075 T3 that has strength of 450 MPa, if the stress work on wing because of the aerodynamics force more than 450 Mpa, then the wing will break. it’s simple..

but the problem is you must know how to calculate the stress work on airframe. in this world (airspace world) there’re only 3 force on airplaine : Axial, bending, and torsional force. just 3 but the analysis more than you think. one force can produce a lot of reaction on airframe and lot’s of the equations rise.

but fortunately, the solving of equation is just looking the constanta on the graph show relations between the constanta and geometri configuration of airframe. then use the constanta and you will find the solution. another problem is you must know the equation to use. this need your analysis in order to choose the appropriate equation from a lot of equation available.

last 3 hour i did exam about this lesson. one thing i hate is we didn’t know the equation, there was no list of equation we need to solve the problem. we were given the graphs but nothing about equation. this’s the worst. in order to solve any problem about lightweight structural analysis, in real life, we need the equation. so what’s the purpose of doing the exam solution about analysis if we dont have the tools to solve that problem? we know how to do it but if you dont have the tools, nothing’s happen.

so dont forget to use the tools in any analysis problem. and in analysis problem exam, it’s important to put the “tools” on the paper or allowable book bringing in.

reference : michael chun-yung niu; airframe stress analysis and sizing

Posted by: iknowwho | November 14, 2008

my great friends

a lot of them have become great persons. at least great person for my criteria. ada yg udah jadi ketua himpunan ada yg udah ketua unit, ada yg sibuk di unit dan himpunan yg lumayan terkenal, memajukan unit, himpunan atau organisasinya, ada yg mencalonkan dirinya jadi ketua..

now it’s back to me.. is there any will to become great person??

kyknya sifat malas tu msh ada,, mls kerja,, mls berkonsultasi,, mls bljr,, mls kerjain ini itu,, mls merintah2.. padahal udah dikelilingi org2 hebat tp msh aja semangat memimpin tu gk ada..

may be u should become great person in other ways.. not by leading something but by leading yourself for a first big step to become the great person. that’s should be the first way to start.

“that’s my second personality talks”

Posted by: iknowwho | November 9, 2008

mulai lagi,,mulai lagi

gk tau knapa tiba2 bisa aja males bangkit dari tmpat berdiam.. why is it so?? udah ada smangat buat berubah tapi mulai lagi,,mulai lagi,,

apakah penyakit malas ini suatu endemik ato epidemik?? (apapun tu bahasa biologinya).. kok bisa muncul tiba2 ?? apakah ada obatnya ya??

bagaimana kalo ada dokter/peneliti penyakit dan obat coba bikin suatu obat penangkal malas..?? kayaknya bakal jadi best seller lasting forever,,, trus dikejar2 sama negara2 maju untuk diambil lisensinya…

tapi tu gk mngkin, sebab peneliti/dokter yg meneliti jg byk yg kena penyakit malas..

beware,,, penyakit malas menyerang siapa saja tanpa memandang bulu, kulit, uban, warna, tinggi, gemuk, rambut, botak, brewokan, gigi nongol, sepatu bolong, bau kaki,, apapunlah itu

tapi penyakit ini gk menyerang org yg tau tujuan hidupnya dan sangat menghargai waktu.., (is that so??) –> (may be)

Posted by: iknowwho | October 25, 2008

Belajar dari Alam

pernah berbohong?
pernah terpikir kalo kita itu pembohong?
minimal membohongi diri sendiri lah..

emang manusia itu kyk gitu. keliatannya ja cool, tak bedosa, baik2 saja, tp kdg2 gk sperti yg terlihat dari luar.
susah kali ya klo kita hidup dengan kbohongan, walopun cuma sdikit..
kyknya cuma org2 saleh yg bisa kyk gitu..

pernah liat org dipalakin, tp trus kita malah muter arah..

pernah lwt mesjid sedang azan tp malah cepet2 jalannya, gk mampir ke msjid,, alasannya nau salat di rumah ja, padahal di rumah jg gk lgsg salat, trus salat diujung waktu.

pernah liat pengemis trus ada uang cepek tp gk mau ngasih, alasannya malu diliat org ‘ngasih kok cepek?’

pernah gk masuk kuliah dgn alasan mending bljar sndiri, pdhal bljar sndri males, trus ujiannya jg minta2 contoh soal..

contoh2 yg aneh..
tetapi hidup yg bener itu ya harus always jujur. hidup dng prinsip kejujuran bisa jadi kunci hidup bahagia dunia akhirat.

—–posting yg lumayan brguna,, akhirnya—–

Posted by: iknowwho | October 25, 2008

Live ur Life

just live ur life

just live ur life

bosen juga mnjalani hidup yg monoton..
pergi kuliah pagi,
pulang siang,
trus maen komputer,
tugas gk dikerjain,
belajar jg gk,
maen komputer sampe malam,
tidur dngn beban di kepala dan pundak,
besoknya tugas dikumpulin dan ujian menanti…

bosen dan penuh tekanan,,
pengen cari kegilaan baru..
pengen cari penyejuk hati,,
pengen bisa berbagi kegilaan ni..
pengen punya tambatan hati,,,hoho..

udah gila nih.. gila wanita,,hahahahaha

Posted by: iknowwho | October 23, 2008

puasa

apa yg dirasa selama puasa?

  • 1. lemes.. pastinya
  • 2. gk trlalu emosional
  • 3. brpikir jernih
  • 4. gk suka tengok sana sini yg nyuci mata
  • 5. lebih santai dan gk buru2… yaeyalah lemes
  • 6. hemat
  • 7. keliatan lebih bijak n cool
  • 8. kerja sistem tubuh lebih efisien.. mnrut penelitian.
  • 9. umur lebih panjang,, ksimpulan brdasarkan penelitian diatas
  • 10. jerawat cepat hilang,, gk nambah lagi,, brdasarkan pengalaman

jd ksimpulannya–> brpuasalah sekali2,, rutin kalo perlu,, tp jgn tiap hari,, hiduplah(puasalah) teratur,,

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