its funny you put mig31bm and don’t know any thing about that fighter. just the non-afterburning civil versions of D30 now approach 30k thrust
it is continuously updated.

JSR ,I dont want to be rude but can you please educate yourself on some basics physics and avionics before commenting ? For F sake read some books please

Electron? What electron?

this :

The E1 pulse is the very fast component of nuclear EMP. The E1 component is a very brief but intense electromagnetic field that can quickly induce very high voltages in electrical conductors. The E1 component causes most of its damage by causing electrical breakdown voltages to be exceeded. E1 is the component that can destroy computers and communications equipment and it changes too fast for ordinary lightning protectors to provide effective protection against it. Even consumer transient protectors are becoming increasingly able to handle faster rise-time pulses, though. There are special transient protectors that are fast enough to suppress nuclear EMP.
The E1 component is produced when gamma radiation from the nuclear detonation knocks electrons out of the atoms in the upper atmosphere. The electrons begin to travel in a generally downward direction at relativistic speeds (more than 90 percent of the speed of light). In the absence of a magnetic field, this would produce a large pulse of electric current vertically in the upper atmosphere over the entire affected area. The Earth’s magnetic field acts on these electrons to change the direction of electron flow to a right angle to the geomagnetic field. This interaction of the Earth’s magnetic field and the downward electron flow produces a very large, but very brief, electromagnetic pulse over the affected area.2
Physicist Conrad Longmire has given numerical values for a typical case of the E1 pulse produced by a second generation nuclear weapon such as those used in high altitude tests of Operation Fishbowl in 1962. According to Longmire, the typical gamma rays given off by the weapon have an energy of about 2 MEV (million electron volts). When these gamma rays collide with atoms in the mid-stratosphere, the gamma rays knock out electrons. This is known as the Compton effect, and the resulting electrons produce an electric current that is known as the Compton current. The gamma rays transfer about half of their energy to the electrons, so these initial electrons have an energy of about 1 MEV. This causes the electrons to begin to travel in a generally downward direction at about 94 percent of the speed of light. Relativistic effects cause the mass of these high energy electrons to increase to about 3 times their normal rest mass.2
If there were no geomagnetic field, and no additional atoms in the lower atmosphere for additional collisions, the electrons would continue to travel downward with an average current density in the stratosphere of about 48 amperes per square meter.2
Because of the downward tilt of the Earth’s magnetic field at high latitudes, the area of peak field strength is a U-shaped region to the equatorial side of the nuclear detonation. For nuclear detonations over the continental United States, this U-shaped region is south of the detonation point. Near the equator, where the Earth’s magnetic field is more nearly horizontal, the E1 field strength is more nearly symmetrical around the burst location.
The Earth’s magnetic field quickly deflects the electrons at right angles to the geomagnetic field, and the extent of the deflection depends upon the strength of the magnetic field. At geomagnetic field strengths typical of the central United States, central Europe or Australia, these initial electrons spiral around the magnetic field lines in a circle with a typical radius of about 85 meters (about 280 feet). These initial electrons are stopped by collisions with other air molecules at a average distance of about 170 meters (a little less than 580 feet). This means that most of the electrons are stopped by collisions with air molecules before the electron can complete one full circle of its spiral around the Earth’s magnetic field lines.2
This interaction of the very rapidly moving negatively charged electrons with the magnetic field radiates a pulse of electromagnetic energy. The pulse typically rises to its peak value in about 5 nanoseconds. The magnitude of this pulse typically decays to half of its peak value within 200 nanoseconds. (By the IEC definition, this E1 pulse is ended at one microsecond (1000 nanoseconds) after it begins.) This process occurs simultaneously with about 1025 other electrons.2
There are a number of secondary collisions which cause the subsequent electrons to lose energy before they reach ground level. The electrons generated by these subsequent collisions have such reduced energy that they do not contribute significantly to the E1 pulse.2
These 2 MEV gamma rays will normally produce an E1 pulse near ground level at moderately high latitudes that peaks at about 50,000 volts per meter. This is a peak power density of 6.6 megawatts per square meter.
The process of the gamma rays knocking electrons out of the atoms in the mid-stratosphere causes this region of the atmosphere to become an electrical conductor due to ionization, a process which blocks the production of further electromagnetic signals and causes the field strength to saturate at about 50,000 volts per meter. The strength of the E1 pulse depends upon the number and intensity of the gamma rays produced by the weapon and upon the rapidity of the gamma ray burst from the weapon. The strength of the E1 pulse is also somewhat dependent upon the altitude of the detonation.
There are many reports of super-EMP nuclear weapons that are able to overcome the 50,000 volt per meter limit by the very nearly instantaneous release of a burst of gamma radiation of much higher energy levels than are known to be produced by second generation nuclear weapons. The construction details of these weapons are classified, and therefore cannot be confirmed by scientists in the open scientific literature

i can see how they shield FBW system but not sure how can they shield the radar or RWR

in my opinion, electric equipment with an antenna like Radar and RWR can’t be shielded from EMP, because they need to receive radiowave so they cant be putted in a Faraday cage, On the otherhand components that doesn’t required outer electromagnetic out put should be quite easy to be shielded from EMP
Come to think of it, EMP effects from a high altitude nuclear explosion will seriously handicapped modern aircrafts, their radar and RWR will be fired, their missiles and bombs ( if carried externally) will likely be fried as well, iam wondering if EMP can denote the warhead of weapons?

yes, but acceleration is nearly non-existent beyond m1.3, ,

and can you give any acceleration graph to support that assessment? or you just made that up?

lest you begin the work of trading energy and thats not going to happen in a fight,

trading energy is not happen in a fight? really? ever heard of boom and zoom tactics ? do you understand why specific excess power is important ?

thus, f-35 wont ever see speed beyond m1.3 in actual combat,

this is simply nonsense

on contrary a supercruiser already starts out supersonic before the fight even began

.
F-35 can maintain a speed of mach 1.2 for 150 miles without afterburner , how far can your supercruiser fly at supersonic speed?

i define it as military setting or above, none is going to cruise and sip tea in combat zone

not sure what you trying to say here, F-35 have afterburner too, and unless you fly a mig-31 or Tu-160 you won’t have enough fuel to cruise at mach 2, even in combat zone, and for sure you wont have enough fuel to cruise at full afterburner either
and just so you know top speed varied dramatically with altitude and the maneuver you do, at sea level you won’t go much faster than mach 1.2 even at full afterburner, and in a dogfight at any altitude, it is extremely unlikely that you can go pass mach 1

DSI air-intakes has been discussed in lenght before.
Sure it has compromises to it, but does anybody here think for one second that the J-20 will have a required max speed of Mach 1.6!?

Cause that is what some of you are claiming, the main reason for F-35 max speed limit is its DSI air-intakes.

the intake and engine design are deciding factor that limit top speed, and nothing concrete is know about J-20 at the moment so bring it up really say nothing. And just because the 2 aircraft have the same kind of intake doesn’t mean they will have the same top speed. Why? because the same kind of intake can be optimized for different speed range depending on their exact size and shape, a DSI is pretty hard to compare because it is a 3D intake. And engine design matter as well, otherwise Mig-25, F-15 and Su-27 will all have same top speed because they all have variable intake or following your logic the Mig-25 will have the least drag, followed by F-15 and then Su-27 will be the most draggy one.
Now, before anyone saying “yeah Mig-25 is less draggy than F-15 because it’s wing is thinner, it’s nose is more pointy.. etc” look at these 2 graph below the first is speed limit of f-15 by altitude in feet, the second graph is speed speed limit of mig-25 by altitude in km, see anything interesting ? even though the public top speed of Mig-25 is higher than F-15 by nearly 0.7 mach, the F-15 is actually faster until 50k feet :

, so believe me a great pert of what you wrote is well know to me.

.so why did you said this ” a su-27 would reach 2,35m while a Su-35 would stop at 2,25 and a Su-34 at 1,8 givrìen that F-35 just reach 1,6m go figure its own drag” if you already understand?

Wow, Su-27, F-16: ok, i’m not asking to evaluate the future treats but maybe putting into comparison some plane that was introduced into service in the current century not?

if you take the future threat such as PAk-FA, J-20, J-31.. etc then the problem would still be the same ( in fact even worse) because the distance that they can detect each other on radar is likely very short so pilot wont have enough time to accelerate to top speed (>mach 2) either. Then another problem is infrared signature, when you go faster, you create more emissions and can be detected from further distance.

And the F-35 is an A2G specced aircraft able to reach just 1,6 M, so bother about supercruise or anything relating to interception or air superiority role for it should fall into the same category you describe, still we are there debating about a totally secondary characteristic for a plane like it by days.

F-35 is a multi role aircraft, just like F-16, Rafale , F-18, su-35 and all others fighters made nowadays, trying to call it A2G only doesn’t make it so, most fighters doesn’t actually spend that much time supersonic either
and no one complaint about the speed of their aircraft just because something designed specifically for speed can beat it

And as a side note: Mig-31 has an excellent supersonic maneuvreability.

what exactly do you mean by “excellent”? mig-31 turn rate is like 1 degrees/sec at mach 2

I imagine the F35 has to be subsonic to drop weapons anyway

it doesn’t have to