144

From the flightradar24 playback, it appears to have been an encounter with Etihad Airways 171. Your flight (Alaska) was at FL360, while the opposing was at FL370. Therefore, there was 1000 feet of vertical separation between them, which is typically considered safe when operating with RVSM, Reduced Vertical Separation Minima rules (see other answers). I ...


56

Fighter jets are very maneuverable, so they may make anything from a shallow bank to a breakaway maneuver. The breakaway is a standard way for fighter jets to exit a formation. It provides a way to safely and quickly gain separation from the other aircraft. In this case the bank is fairly shallow, but when the aircraft disconnects they are already in a ...


50

It's unlikely. Because of RVSM, Reduced Vertical Separation Minima rules, the vertical distance between airplanes passing each other is only 1000 ft. If you were in the flight deck so you could see out front, you'd be having a wonderful time freaking out because airplanes on the same airway pass above and below going the other direction only 1000 ft away. ...


45

Doesn't really look all that aggressive to me, either way the fighter and the tanker are very vulnerable while refueling. Usually there is more than one aircraft waiting to refuel, so the goal of this game is to run as many of the aircraft in formation through refueling as quickly as possible. In order to do that, you need to get your wake out of the way ...


34

The difference between an aileron roll and a barrel roll is that an aileron roll's centre of rotation is very close to or on the aircraft. A barrel roll has its centre of rotation around a point further away from the aircraft itself. The difference can be appreciated in this image: Image Source You can find out about the difference in feeling that these ...


25

Rate of turn is dependent on the following two items: The horizontal component of lift (centripetal force) The tangential velocity of the aircraft (true airspeed) The rate or turn is directly proportional to the horizontal component of lift and inversely proportional to the tangential velocity of the aircraft. For a given angle of bank, the vertical and ...


22

In a barrel roll, the aircraft rotates both in its longitudinal and lateral axes, while in case of aileron roll, the rotation is only about the longitudinal axis. A barrel roll, image from flightsimbooks.com If properly executed, there is no change in alttitude in case of an aileron roll, while during barrel roll, the aircraft follows a helical path. An ...


21

If such a pair of states does exist it ought to be straddling a Mach boundary (I think) e.g. A subsonic & B trans-sonic. Or A trans-sonic & B supersonic etc. Reasoning: To get from any point A to B in parameter space should usually be a state function i.e. path independent. i.e. You can give many tiny increments or one large increment. In our ...


21

A prolonged series of steep turns will not produce a stall in subsequent straight and level flight. "after perhaps twenty turns have been completed, it will stall: stall, mark you, out of level flight with cruising throttle!" In this case "level flight" means not climbing or descending while still in a steep turn. Stopping the turn by rolling level ...


20

Another way of explaining it in simpler terms would be: Two vehicles, driving at 10m/s and 100 m/s respectively, both execute 180 degree turns to the left. The catch is that each car must do the turn so that the driver only experiences 0.5G lateral acceleration. For the car traveling 10m/s this will mean a turn radius of 20m. This car will complete the ...


19

Possible and Plausible are two different things. Is it possible to fly a fighter jet between a missile and another aircraft, and either (a) confuse that missile so it follows the fighter instead) or (b) have the fighter be hit by the missile instead of the original target aircraft? Yes. Modern fighters are capable of maneuvering in the manner shown: they ...


19

A recent article in Aviation Week showed a modified Bombardier Global 6000 with a "canoe" type fairing underneath the fuselage which typically houses a variety of radar or electronic intelligence (ELINT) equipment (link (free registration req'd) with pic) (alternate). The UK's RAF flies the Sentinel aircraft which is based on a prior Bombardier model, the ...


18

There is no difference aerodynamically. The only difference is in intention and presence of the wind. The airplane does not care about the ground track, all it feels is the movement through the air. Both side- and forward-slip make the airplane fly slightly sideways through the air, somewhere in the direction between nose and downwards pointing wing. If ...


17

This is a case of divergent design, and you can't know the answer without asking why current aircraft are designed they way they are. Following the work of Col. John Boyd in the 1960's in developing the 'Energy-Maneuverability Theory', the U.S. and allies primarily designed combat aircraft and tactics around the idea that an aircraft's specific energy state ...


16

The maneuver is called a "breakaway maneuver" or simply a "break", it's also sometimes colloquially referred to as "peeling off" in the context of aircraft leaving formation. You can see it more clearly in this video: This is a standard maneuver used when disengaging from a intercepted target, or as a way to safely exit ...


16

I do not want to speak for civilian training here, and I do know that each aircraft has its own set of emergency procedures. Those procedures will depend upon the instrumentation that you have available to you. In my case I had full IFR instrumentation with a state of the art inertial navigation system. Spin recovery should be in the set of immediate action ...


16

Different air forces may operate with different conventions, but right from basic flight training the RAF classifies banked turns of 20 degrees as "gentle," 40 as "medium" and 60 as "steep," and the most commonly used are "medium". Ref: The RAF Basic Flying Manual (1952 edition) - https://www.t6harvard.com/wp-content/uploads/2017/11/Chapter-3.pdf page 26-27....


15

Entirely possible, although it is the turn coordinator not the artificial horizon that is primary -- to determine the direction of the spin. Nose-down elevator, rudder opposite the spin, the when spinning stops recover from the dive using airspeed & altimeter for pitch control & the turn coordinator for roll. Those instruments don't tumble. I'm ...


14

The aircraft in the video is a remote-controlled (rc) airplane. Why it can "hover" is simply: The thrust generated by a big fan / rc-jet-engine is much higher than the weight of the plane. If the force generated by the turbine is the same than the downward-force of weight of the airplane, it hovers. By very carefully adjusting the thrust and placing the ...


14

You are right: A slip is a cross-controlled (and uncoordinated) situation. It's exactly what your instructor was teaching you to avoid during your early lessons. As far as nomenclature goes: all slips are cross-controlled maneuvers, but not all cross-controlled maneuvers are slips: On climb-out in most piston singles you will be stomping on the right rudder ...


14

Part 1 - TVC Perception The US also ran several programs with TVC: F-15 STOL/MTD and ACTIVE. F-16 VISTA / MATV. AVEN: F-18 HARV (High Alpha Research Vehicle). Overview pdf. F-22 (almost 200 produced) X-31. X-36. (Yaw only.) X-44 MANTA (proposed F-22 variant) (All photos from their respective wiki pages except ...


14

I fly such a plane. My Laser has full inverted systems (oil, gas) and symmetrical airfoils. You're right that when in upright flight the wings are producing lift in the direction away from the wheels and when in inverted flight the lift vector points in the opposite direction. You're also correct that the wings are producing zero lift at 90 degrees of ...


13

The Kulbit maneuver is a variation on the Cobra maneuver (Pugachev's Cobra) with a higher pitch rate and continuous positive pitch rate throughout the maneuver. It requires two things: A docile pitch behavior of the airframe over the full angle of attack range of 360°. Docile means that the pitch moments stay low and do not change abruptly with the angle of ...


13

My theory here is that this was a flight check of the NDB at Jalalabad, but I could very well be wrong. Land-based navigation aids (such as VORs, DMEs, ILSes, and NDBs) can fail, and not always in a "no signal" way -- some failures are more subtle, but can cause the NAVAID to put out dangerously wrong information. Hence, on a periodic basis or after ...


12

The short answer is that at negative 2 G, the airframe limit for the A7-E, it took little effort to keep your feet on the rudder pedals. In controlled flight there are aircraft limitations on both positive and negative G. I flew the A7-E for the US Navy and have some operational experience that might offer some context to the question. I believe the ...


11

Yes, increased maneuverability and redundancy are the main benefits of this layout. Another is a wider possible range of the center of gravity. In the video linked in Federico's comment you can see that the canards reach high negative deflection angles in high-alfa attitudes: This means they will still operate in attached flow when wing and tail are already ...


11

The key word is "rate" of turn. It means that if you are travelling slower, it will take less time to complete a 360 degree turn than if you were going fast. It's the same as when driving a car. If you want to complete the turn quickly at a high speed, you need a steeper bank angle compared to the angle you'd need at a low speed.


11

Practice (or real) forced landings and (SFO) simulated flame out (or actual flame out - engine failure) maneuvers are done often by the military in the fashion shown in the pictures below. Part of the reason for this type of maneuver is due to the characteristics of the aircraft involved. For example, high speed fighter jet aircraft need to fly fast and ...


11

The Etihad flight was a 777, which is a much larger aircraft, but of almost the same proportions as the 737. Also living near an airport, I am well familiar with how difficult it is to gauge altitude. You see airplanes apparently moving at quite different speeds; actually a "slow" plane is moving at a similar speed but is larger and farther away. It's ...


10

No. With that delta wing shape it will have pitch control problems at higher angles of attack. The Cobra maneuver requires a small pitch-down moment over the post-stall region up to 110° angle of attack. I very much doubt that this wing planform will have such pitch characteristics, and without thrust vector control a docile pitch behavior is a prerequisite ...


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