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1. Yes they come under parasitic drag. Parasitic drag is sub divided into Form and Skin Friction. While Form drag deals with cross sectional area, skin friction deals with the friction between surface and the fluid. ( Cross sectional area will remain mostly the same but skin friction will...

1. I didn't say many i said few. 2. I incorrectly mentioned parasitic drag. I should have referred Skin Friction drag. 3. And this is just a model. Lets wait and see if they put a fuel tank or use it for avionics.

Agreed....

The flight control rods dont take up a foot diameter even with the hydraulic rams even on this early Mig-21U. In fact with a similar dorsal or "saddle" tank the control rods pass right through this particular tank on the spine. Clearance Issues for control rods + Electrical harnesses (Mig 21)...

In case of Mig 21 it houses the Flight control rods, not the fuel.

F-16 B initially had 70s avionics not 80s but they kept on upgrading it (Remember MLU). Yes you are right in saying that range of dual seat is less than single seat model. (But only if it takes up the internal fuel tank's place. If the designer wants to save his fuel tank then he will have to...

ok. so for two extra hardpoints..You will need to change: 1. Wing 2. Fuselage Bulkheads 3. Fuselage Longerons 4. Engine 5. Horizontal Stabilizer ( Because now it will have to bear more load in pitch up) 6. Vertical Stabilizer (Because it was designed for the original wing only)

TVC can reduce the stall speed and have other benefits as well. (I am not sure if F-35 utilizes Thrust vectoring other than for landing and takeoff. However it was having some issues with airframe not able to withstand the required sustained turn rates) But as far as the Engine mounts are...

My point was that the absence of dorsal spine in C model is due to the fact that you have space behind the front cockpit to house avionics. In D model because you took up that space (for the seat) therefore you have to put the avionics somewhere else. And there is No support for CFT from...

You cannot tell the Internal Fuel tanks from the cutaway (P.S Rudder and Stabilizer are also Cutaway).

Composites.................................................Very hard to maintain. But composites are the future. CFT like Block-52s.........................................Doable but major structural changes may be required. Retractable In Flight refueling Probe like Grippen....I hate those...

Alot of Structural modifications would be required. It is not possible to go into a major design phase after production phase. (use a multiple ejection Rack and forget about structural modifications .... Easy) (F-15 has only one hardpoint under each wing but still look it up in Google and you...

Avionics yes. Undisclosed I don't think so. Support CFT. Big NO. how are CFTs supported in F-16 C then? I think in dual seat the rear seat takes up the avionics compartment so you have to shift them somewhere else and the only viable option seems to be making of an dorsal spine. I may be...

Nope it holds the avionics. Because in a Dual seater the rear seat takes the space where the avionics used to be in a single seater.

I won't really bet on extra Hard Points and Increased wing span Reasons: 1. Increased wing span will create more lift but will also increase Drag and Lift induced drag. (you will need more juice out that engine) 2. Increased lift will create much higher stresses on the Bulkhead (...

@Adeel Faheem in aqal kay andhoun ko ulta nazar aata hai Majnoo nazar atee hai laila nazar ata hai @xyxmt Progress on Altaf Hussain case is pending because govt of Pak is not accommodating investigating team that has to visit Pakistan. Investigation cannot proceed until they get the go...

Yes.... ISLAMABAD, Dec 4: Pakistan Tehrik-i-Insaf (PTI) chairman Imran Khan has filed a damages suit of Rs10 billion against Pakistan Muslim League (PML-N) leader Khawaja Mohammad Asif for leveling allegations against the Shaukat Khanam Memorial Trust (SKMT). While admitting the plea...