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Aerospace Pictures and Art Thread


LostCosmonaut

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su27-2.gif

 

A schematic diagram of the internals of the SU-27.

 

The blended fuselage of the SU-27 is filled with fuel tanks that give it completely stupid fuel capacity; 9,400 kg of fuel can be carried internally.  This is greatly in excess of what most other tactical types can carry; the Rafale has 4,700 kg of internal fuel capacity, 6,700 kg for the super hornet, and 5,900 kg for the strike eagle.  When the SU-27 was first shown to the world at the Paris air show, the display aircraft had flown all the way from Russia without drop tanks or refueling.

 

Completely filling the internal fuel tanks compromises the SU-27's maneuverability greatly, however, as the fuel adds a great deal of weight and shifts the center of gravity so far forward that it causes some pitch stiffness.  The canards on later flanker variants offset this to some degree.

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They're called Conformal Fuel Tanks (CFTs), and they're an option on vipers block 60 and up if memory serves.

 

They sure do spoil the lines, but they're way less draggy than conventional drop tanks.

I've seen CFTs for the Eagle, just had never seen them on a Viper before.

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apg63v3_eglin.jpg

 

A technician services the APG-63v3 AESA radar on an F-15C.

 

AESA radars are an enormous advantage in the ongoing electronics warfare arms race.  AESA radars do not need to physically move; the beam is steered electronically using constructive and destructive interference between the transmit and receive modules.  AESA sets can split their transmission power into multiple beams in order to scan the volume of sky in front of them more rapidly.  Additionally, they can break up their signals' strength along multiple frequencies in random and unpredictable ways.  This later capability makes them much less likely to disclose the location of the aircraft with the AESA radar and much harder to jam, even using the latest DRFM jammers.

 

AESA retrofits for the F-15, F-16, Super Hornet, Rafale and Eurofighter Typhoon also exist.  In addition, the latest versions of J-10 and Flanker have AESA radars.  All fighters with stealth pretensions also possess AESA radars, as without the low probability of intercept tricks that AESA makes possible, the radar is too much of a compromise to stealth.

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