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Poslao: 07 Feb 2010 22:20
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- mean_machine
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Kompromis je negde morao biti nacinjen.
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Registruj se da bi učestvovao u diskusiji. Registrovanim korisnicima se NE prikazuju reklame unutar poruka.
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Poslao: 07 Feb 2010 22:22
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- Taso

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mean_machine ::Prema ovome PAK-FA je pogodniji za supersonicne letove.
Naravno da je pogodniji. Optimiziran je za supersonicni let vise nego Raptor. Prema nekim (nezvanicnim) izvestajima, Raptor je 'kratkog daha' u supersonicnom rezimu.
Uporedite ugao napadnih ivica....kod Pak Fa su ostriji (pogodniji za supersonicni let)
a ima i drugih karakteristika koje su mnoge ovde (mislim neopravdano) kritikovali, na primer usisnici za vazduh i prostor izmedju njih.
Jedna nezvanicna analiza....
The center of gravity, which can be extrapolated from the landing gear location, is surprisingly forward. The redline represents the probable CG location. The green line represents the calculated mean aerodynamic chord, or MAC. Center of gravity is usually located along a percentage of this line; around 25-30% for stable civil aircraft and 40-50% for FBW aircraft.
Now, we know the CG can't go any backwards because the airplane will tip back and stay there on landing if that were so. So the Red line represents the furthest rear the CG can be. Since the location is in fact FORWARD of the MAC leading edge, this leads me to conclude that the clearly defined "wing" does not provide the large majority of the total lift.
In this way, the aerodynamics of the T-50 differ from the F-22. Based the F-22's landing gear, the Raptor's CG is more typical of a conventional design and the CG is at ~35-40% of the MAC. With the T-50, since the CG is so forward on the conventional wing, my hypothesis is that the areas that look like strakes and the area between the engines generate significant lift and should be treated more as part of the wing. Also, the layout seems to have more lifting body characteristics than the norm for both Western and Eastern fighters. Given the layout of the Su-27 family, with its widely spaced engines and generously large strakes, it does make sense that Sukhoi would continue in this direction, though.
Besotted ::Vidi se da su Ru si isli izgleda na frontalni stealth only i verovatno brzinu i domet jer sa strane nema govora o steathu i od pozadi takodje.
Sa strane ima bolji stealth nego Raptor
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Poslao: 07 Feb 2010 22:36
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- mean_machine
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Ne moze da ima bolji stelt sa strane od F-22 ako zadrze cilindricni oblik usisnika. Takodje okrugli izduvnik nije najsrecnije resenje sto se tice stelta. Dovoljno je pogledati komplikovani oblik izduvnika na F-35
I pored ovakvog oblika (izlomljene ivice) izduvnik je stelt samo za radio talase cija je frekvencija iznad 7 GHz.
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Poslao: 07 Feb 2010 22:39
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Besotted :: Nivo stealth-a se nece nikada ni znati verovatno.
Да, то је чињеница. Свако ће тврдити нешто, а колико је то тачно тешко је утврдити, нарочито колико је мањи, или већи одраз у односу на конкурента.
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Poslao: 07 Feb 2010 22:40
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- sasans23

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Изгледа да је први прототип био спреман да полети још прошлог лета.
Чекало се на завршетак развоја мотора 117, који је прва тестирања имао тек 21. јанура ове године, на Су-35 710.
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Poslao: 07 Feb 2010 22:40
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- Besotted

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Taso ::mean_machine ::Prema ovome PAK-FA je pogodniji za supersonicne letove.
Naravno da je pogodniji. Optimiziran je za supersonicni let vise nego Raptor. Prema nekim (nezvanicnim) izvestajima, Raptor je 'kratkog daha' u supersonicnom rezimu.
Uporedite ugao napadnih ivica....kod Pak Fa su ostriji (pogodniji za supersonicni let)
a ima i drugih karakteristika koje su mnoge ovde (mislim neopravdano) kritikovali, na primer usisnici za vazduh i prostor izmedju njih.
Jedna nezvanicna analiza....
The center of gravity, which can be extrapolated from the landing gear location, is surprisingly forward. The redline represents the probable CG location. The green line represents the calculated mean aerodynamic chord, or MAC. Center of gravity is usually located along a percentage of this line; around 25-30% for stable civil aircraft and 40-50% for FBW aircraft.
Now, we know the CG can't go any backwards because the airplane will tip back and stay there on landing if that were so. So the Red line represents the furthest rear the CG can be. Since the location is in fact FORWARD of the MAC leading edge, this leads me to conclude that the clearly defined "wing" does not provide the large majority of the total lift.
In this way, the aerodynamics of the T-50 differ from the F-22. Based the F-22's landing gear, the Raptor's CG is more typical of a conventional design and the CG is at ~35-40% of the MAC. With the T-50, since the CG is so forward on the conventional wing, my hypothesis is that the areas that look like strakes and the area between the engines generate significant lift and should be treated more as part of the wing. Also, the layout seems to have more lifting body characteristics than the norm for both Western and Eastern fighters. Given the layout of the Su-27 family, with its widely spaced engines and generously large strakes, it does make sense that Sukhoi would continue in this direction, though.
Besotted ::Vidi se da su Ru si isli izgleda na frontalni stealth only i verovatno brzinu i domet jer sa strane nema govora o steathu i od pozadi takodje.
Sa strane ima bolji stealth nego Raptor
Ovaj lik gore izmislja toplu vodu. Sve sto je rekao je ocigledno da Sukhoi ima lifting body concept kao i F-14 kojem swing wings nisu bila dovoljna za onaj nivo uzgona i pokretljivosti i takve brzine. Morali su da se odluce za takav prilaz zbod 3 stvari, uzgona, goriva i raketa.
Sto se tice tvog stava da ima ne slican nivo nego i bolji stealth od Raptora ti to baziras na...?!
Pa jesi li obratio paznju kako se T-50 vide motori i da su klasicnog oblika? Sada pogledaj Raptor i od pozadi takodje ne samo sa strane.
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Poslao: 07 Feb 2010 22:43
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mean_machine ::
I pored ovakvog oblika (izlomljene ivice) izduvnik je stelt samo za radio talase cija je frekvencija iznad 7 GHz.
Иначе је немогуће направити стелт за читав спектар фреквенција.
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