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# Tag Info

27

At the instant of touchdown, any vertical kinetic energy the plane possesses must be absorbed by the landing gear, which thereafter must bear the entire weight of the plane. That kinetic energy depends on the sink rate and the plane's weight. The sink rate ideally will be zero at wheels down in a perfect world, but the gear is designed to accomodate a ...

17

Maximum landing weight (MLW) limit exists primarily to cater for approach climb performance requirements (i.e. go-around requirement). As per 14CFR 25.1001: if the aircraft does not have a fuel dumping system, it must meet the all-engine-operating and one-engine-inoperative climb in the approach climb configuration at maximum takeoff weight. Otherwise, ...

11

In my opinion it's because of your left of centerline vantage point and the sight picture burned into your brain by the always left side crosswind aspect, and in your particular case the transition to an opposite aspect is confusing your eye/brain/hands-feet processing more than other people. Everybody has their learning quirks. The sight picture you are ...

10

The quoted explanation about "fail operational" and "fail passive" is correct, in that "fail operational" means the system will continue to function after an failure, and "fail passive" means the system will not misbehave after an failure. The exact number of autopilots required to make this work, however, is debatable; and much depends on how you define it....

9

Your $v_\mathrm{ref}$ does not depend on density altitude since it is given in Indicated Airspeed, which already accounts for density effects. However, the True Airspeed and therefore also Groundspeed will be higher at a higher density altitude, resulting in more runway required to stop. The Flight Safety Foundation has a nice summary of factors influencing ...

4

The Eurocontrol Lexicon can help here as well. The Estimated In-Block Time is defined as: The estimated time that an aircraft will arrive in-block. (Eurocontrol) This is not very helpful, but the definition for Actual In-Block Time is: The actual date and time when the parking brakes have been engaged at the parking position. (Eurocontrol) This ...

4

Definitions provided by the FAA can be found in AC 120-28D - Criteria for Approval of Category III Weather Minima for Takeoff, Landing, and Rollout. From the document we find for Fail Operational: 4.3.2. Fail Operational Category III Operations. A Fail Operational System is a system which after failure of any single component, is capable of completing ...

4

Depends on how bad is the sea state, but the general technique for seaplanes is to land parallel to the swell, preferably on top of a wave: When landing on a swell system with large, widely spaced crests more than four times the length of the floats, the best landing heading parallels the crests and has the most favorable headwind component. In this ...

4

A full stall landing is generally a bad idea for everyday flying, regardless whether you're in a Piper Tomahawk or a 747. The slightest error can lead to stalling well above the runway surface, resulting in a drop that can injure the pilot and passengers, damage landing gear, and in some cases even damage the fuselage structure or main wing spar. Even if ...

3

Good answers, but one thing not mentioned is the fact that people are rarely completely ambidextrous. (I would guess that you are probably right handed, is this correct?) Because of this, we have a natural tendency to be more comfortable doing things in one direction over another. I have noticed this in my own skiing, and from instructing others; right ...

3

Carlo already mentioned the most probable cause to your drift to the left: aiming point being too close in front of you, I've dug up a couple more points from the archives of my mind for you to check : The footwork is not symmetrical in left and right crosswind landings. This is because of the prop slipstream. As you've kicked the plane in alignment with ...

3

Transport aircraft are certificated to a maximum operating temperature for departure that is related to International Standard Atmosphere (ISA), typically 35 deg C above ISA (there may be airplanes certified to ISA +40), ISA being 15C at sea level and dropping from there at the standard adiabatic lapse rate . ISA temperature at Phoenix airport at 1135 ft ...

2

I don't think the quote you gave is correct. This might be the case for some aircraft (like the Boeing 777 with 3 autopilots), but not in general. A more general definition is: Autoland systems are normally designated Fail Operational or Fail Passive. A Fail Operational system must have at least two autopilots engaged for the approach. The failure ...

2

Most likely this is inconsistency with your crosswind techniques in the round-out. Remember: use rudder pressure to point the nose at the far end of the runway, and aileron pressure to hold the aircraft on the centerline of the runway. Just how much pressure it takes is whatever is required to achieve and maintain these metrics. Also be mindful that you ...

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