When a helicopter engine fails the pilot lets the rotor blade rotate freely pushed by the wind as the helicopter is falling out of the sky. That is called auto-rotation.
normal rotation is with the engine powering the rotor.
the most important goal of auto-rotation is to get enough lift right before touch down by flaring so the landing is not a crash.
You would also enter into autorotation when the tail rotor becomes ineffective and you can't recover it otherwise. Then once the tail rotor is back into action you can drive the rotor again.
Inspired by this question. My knowledge concerning helicopters is quite limited: what is auto-rotation? are there other "rotations" possible? in what do they differ?
The alpha vane is an external probe used to measure the angle of attack. I have been trying to understand how exactly it works, but I can't find any clear explanation or simulation. Is the vane static or dynamic i.e. does it rotate along its central axis? Given that it has a significant surface area, I think that it would either: Rotate because of the force/drag exerted by the airflow, and give an angle of attack proportional or equal to its angle of rotation Measure the force being exerted on it via a force sensor embedded in the surface Is either of these correct? In short, how
This is what I know: $V_1$ is the takeoff airspeed after which the aircraft must take off, no matter what happens after $V_1$ has been reached. That's the easy part (I think). $V_R$ is the rotation airspeed Are there any other $V$-speeds? What I'm specifically curious about: Is $V_1$ related to runway length? Is there an absolute maximum $V_1$ for each aircraft type? If so, can it vary...? (this is the case for most light aircraft, but I guess the whole concept is not applicable in that case) What exactly is $V_2$? Is there a $V_3$? (and so on) Anything else worth knowing about $V$-speeds?
Provided an aircraft with a fly-by-wire system, there are basically two possible choices when it comes deciding how to let the pilots interface with it: rate control / attitude hold: a deflection... translate to a deflection of the surfaces, mimicking the "old" mechanical control setup. It is my understanding that this is the design choice of Boeing in its new aircrafts. I do not wish to discuss how Airbus and Boeing made their design decisions, but rather see if there has been performed a study on what interface is preferred by pilots, eventually differentiating among private/commercial pilots
. This "mushing" went on for what seemed ages before I eventually applied power and pushed the nose down to gain airspeed again. We tried it again after that and the same thing happened. I had an instructor... this to happen? (My guess is it is CG related) And most importantly: If I would have continued this "mushing" flight, would it be possible to have entered a flat spin or a simple "drop out of the sky...When I took delivery of a new Cessna 182T last year, I did a test flight for certification purposes. During the test flight we had to perform a power off stall but that didn't go as planned
In a full motion Level C or D simulator like those used by the airlines and for jet type ratings: How should a pilot log the simulator time in their logbook? I.e. Can you log: Total Time Instru...
are used to communicate between the aircraft and its base. Various types of messages are possible, for example, relating to fuel consumption, engine performance data, aircraft position, in addition to free... pinged to track an aircraft's position and heading? Would this require any intervention by the pilots? (posted separately) Is this system standard on commercial airliners? What data do Airlines collect
Chemtrail conspiracy theorists believe that there are certain additives being put into jet fuel to spew out [nano-]particles that rain down on us, for means that are being kept secret. The hypothesiz...
Following acceleration paramters are transmitted from Inertial Reference System (IRS) to Flight Control System (FCS) Flight Path Acceleration Along Track Acceleration Cross Track Acceleration Vertical Acceleration Unbiased Normal Acceleration Along Heading Acceleration Cross Heading Acceleration I only know acceleration based on the aircraft axis i.e lateral, longitudinal & Normal acceleration but what these acceleration paramters signifies?
Aircraft categories include: Airplane Rotorcraft Glider Lighter than air Powered lift Powered parachute Weight-shift-control I'm familiar with all of these except for weight-shift-control. What are they??