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Topic: Yaw Angle

	Yaw - Wikipedia, the free encyclopedia
		Yaw, the name for the Levantine god of chaos, rivers, the sea, and the primordial waters;
		Yaw, an aeronautical and nautical term which indicates how far a craft is pointing away from its direction of travel due to rotation about its vertical axis.
		Yaws, a tropical infection of the skin, bones and joints
	en.wikipedia.org /wiki/Yaw (152 words)

	EPA: Federal Register: Test Methods: Three New Methods for Velocity and Volumetric Flow Rate Determination in Stacks or ...
		The angle between the axis of the stack or duct and the pitch component of flow, i.e., the component of the total velocity vector in a plane defined by the traverse line and the axis of the stack or duct.
		The pitch angle is the angle described by this pitch component of flow and the vertical axis of the stack.
		For each probe used to measure yaw angles with this method, a calibration procedure shall be performed in a wind tunnel meeting the specifications in section 10.1 to determine the rotational position of the reference scribe line relative to the probe's yaw-null position.
	www.epa.gov /EPA-AIR/1999/May/Day-14/a11796.htm (17786 words)

	Yaw Error Angle Monitoring
		After the unwrapping the yaw angle is computed along the orbit and yaw information (mainly the mean yaw and standard deviation per orbit) are sent to ESOC to re-compute and uplink on satellite new AOCS parameters.
		Yaw error angle is also estimated by analysing the Scatterometer raw data.
		In particular from the Doppler frequency shift of the received echo is possible to retrieve the yaw error angle.
	earth.esa.int /pcs/ers/yaw (492 words)

	Yaw-Wise Torque Budget [Ch. 8 of See How It Flies] (Site not responding. Last check: 2007-10-11)
		In this situation, the relative wind is striking the vertical fin and rudder at an angle.
		This causes the airplane to yaw to starboard.
		Yawing the airplane changes the direction it is pointing which does not automatically change the direction it is going; the “boat turn” effect exists but is feeble and inefficient.
	www.av8n.com /how/htm/yaw.html (8618 words)

	DNW - SST MODEL SUPPORT SYSTEM
		The optional alpha shifter of the model support enables the angle of attack of incidence to be adjusted from 0º to 20º within 0.5 sec.
		By rolling the model support mechanism over 90º but keeping the model in an upright position, the methods of setting the yaw angle and the angle of incidence are interchanged, permitting to program the yaw angle at a preset angle of incidence (see picture on the left).
		In the continuous alpha-mode, the angle of incidence is varied continuously and the forces and moments measurements are carried out on the moving model, which travels the prescribed range.
	www.dnw.aero /facilities/sst/supports.htm (485 words)

	The Node - SinScript - Func_launcher commands (Site not responding. Last check: 2007-10-11)
		The pitch angle variance is the amount of possible angle variation from the nominal pitch angle value set by the last setXdir command.
		The yaw angle variance is the amount of possible angle variation from the nominal yaw angle value set by the last setYdir command.
		The roll angle variance is the amount of possible angle variation from the nominal roll angle value set by the last setZdir command.
	www.ritualistic.com /node/funclaunchercom.htm (531 words)

	Gimbal lock - Wikipedia, the free encyclopedia
		In gyroscopic devices controlled by Euler mechanics or Euler angles, gimbal lock is caused by the alignment of two of the three gimbals together so that one of the rotation references (pitch/yaw/roll, often yaw) is cancelled.
		For example, an airplane uses three references, pitch (angle up/down), yaw (angle left/right on a vertical axis) and roll (angle left/right on the horizontal axis).
		If an airplane heads straight up or down (change of pitch), one other reference (the yaw) is cancelled, one loses a dimension of rotation, because there is always a value for one angle of rotation that yields infinite values of the other two angles (in this case, the yaw).
	en.wikipedia.org /wiki/Gimbal_lock (320 words)

	United Sensor Corporation 2 Dimensional Probes
		Preferably the probe is rotated until P2 = P3; the flow direction is established as 0° yaw angle and within the probe's limitations P1 indicates total pressure.
		This average pressure changes only slowly with yaw angle, so P2 and P3 do not need to be exactly equal when the pressures are observed, and the probe can be effectively balanced more quickly.
		With the use of the choke, the static pressure error at 1° yaw is negligible (Fig.
	www.unitedsensorcorp.com /2d.html (440 words)

	Air Vehicle Definitions: Angle of Yaw
		The angle of yaw is defined as the angle between the relative wind and the X axis of the air vehicle when that relative wind vector has been projected onto the air vehicle's ZX plane.
		It should be noted that the angle of yaw has a point of singularity: if the relative wind vector is co-linear with the Y axis, the angle of yaw is undefined since the relative wind will have no projection onto the ZX plane.
		Angle of yaw = arcsin(________________) __________ / \/ v
	www.grc.nasa.gov /WWW/price000/avp/htc/avpdef_angleofyaw.html (309 words)

	Author (Site not responding. Last check: 2007-10-11)
		The desired yaw rate and the desired slip angle are calculated as the first order lag function of the steering input.
		Therefore the yaw moment control systems are expected to suppress the deterioration of the steering control effects in nonlinear or large lateral acceleration ranges.
		From the steering angle, the accelerator pedal position and the brake pressure the desired motion is derived while the actual vehicle motion is derived from the yaw velocity and lateral acceleration.
	www.eng.warwick.ac.uk /~esrql/notes011.htm (2788 words)

	Electronic Code of Federal Regulations:
		To find the zero yaw position and the yaw angle of flow, the curve found in the stack is computationally compared to a similar curve that was previously generated under controlled conditions in a wind tunnel.
		Determine the yaw and pitch angles at all the point(s) in the test section where the velocity pressure cross-check, as specified in section 10.1.1, is performed.
		An angle measuring device whose position can be independently adjusted (e.g., by means of a set screw) after being locked into position on the probe sheath shall not be used for this check unless the independent adjustment is set so that the device performs exactly like a device without the capability for independent adjustment.
	ecfr.gpoaccess.gov /cgi/t/text/text-idx?c=ecfr&sid=474f779beade290997e4611971d078f4&rgn=div9&view=text&node=40:7.0.1.1.1.0.1.1.2&idno=40 (16314 words)

	Dr Derek Bray, DAPS - External Ballistics Supplementary Information (Site not responding. Last check: 2007-10-11)
		This is initially flying at zero yaw incidence along its flight trajectory and is then struck by a gust of wind so that the nose is deflected upwards, producing a yaw angle (α).
		The response of the projectile to this disturbed yaw angle determines its stability characteristics.
		If the yaw angle initially increases as a response then it is statically unstable while if the disturbed yaw angle is retained the shell is neutral.
	www.rmcs.cranfield.ac.uk /aeroxtra/exb3aa.htm (566 words)

	Untitled Document (Site not responding. Last check: 2007-10-11)
		Blowing air through the propeller disk does lower the angle of attack of the propeller blades, but even if the air crosses the disk at a reasonable angle, it lowers both blades equally, to an excellent approximation.
		Finally, we must consider adverse yaw, which is a relatively minor contribution, it can only exist during the fraction of a second after the ailerons have been deflected and “before” the airplane has established a steady roll rate.
		The amount of adverse yaw you expect is proportional to the amount of aileron deflection, but also depends on your airspeed, or more precisely on your angle of attack.
	www.qmfc.org /school/yaw.htm (4501 words)

	Satellite-tracking millimeter-wave reflector antenna system for mobile satellite-tracking - Patent 5398035 (Site not responding. Last check: 2007-10-11)
		The antenna system of claim 2 wherein said dither angle is on the order of 1 degree to the right and to the left of a current antenna azimuth angle commanded by said means for rotating and wherein said sinusoidal dithering has a rate on the order of 2 Hz.
		The antenna controller steers the antenna azimuth angle in response to an inertial vehicle yaw-rate sensor and an estimate of the antenna pointing angle error is obtained by "mechanical dithering" of the antenna.
		The mechanical dithering algorithm 116 generates an error signal representing the pointing angle error which passes through a low pass filter 118 and is multiplied by a constant K in amplifier 120 as rate feedback and is multiplied by a constant G in amplifier 122 as acceleration feedback.
	www.freepatentsonline.com /5398035.html (7089 words)

	Dynamic Longitudinal, Directional, and Lateral Stability
		To have static directional stability, a positive yawing moment should be generated if the airplane is disturbed to a negative yaw angle or alternatively by convention, a positive sideslip angle ß and a negative yawing moment generated for a negative sideslip angle excursion.
		When placed at an angle of attack due to the sideslip disturbance, it generates a side force which when multiplied by the moment arm (center of gravity of airplane to aerodynamic center of vertical tail) produces a stabilizing moment that tends to move the airplane back to a zero sideslip or yaw condition.
		When the airplane yaws or rolls into a sideslip so that side forces on the airplane are generated, the yawing moments that arise continue to increase the sideslip.
	www.centennialofflight.gov /essay/Theories_of_Flight/Stability_II/TH27.htm (1840 words)

	The yaw of repose
		The magnitude of the yaw of repose angle is typically only fractions of a degree close to the muzzle, but may take considerable values close to the summit especially for high-elevation angles.
		The occurrence of the yaw of repose is responsible for the side drift of spin-stabilized projectiles even in the absence of wind.
		The above formula for the yaw of repose vector is an approximation for stable bullet flight.
	tuffsteel.com /Ballistics/bullfly/yawrepf.htm (169 words)

	[No title]
		r angle of attack: 0.000 degrees angle of yaw: 0.000 degrees ijk_range subregion inflow region 2 zone 1 range: (1:49,2:2,1:1) mach number: 0.120 static pressure: 13.988 psi static temperature: 499.910 deg.
		r angle of attack: 0.000 degrees angle of yaw: 0.000 degrees ijk_range subregion inflow region 3 zone 1 range: (1:49,3:3,1:1) mach number: 0.130 static pressure: 14.004 psi static temperature: 500.060 deg.
		r angle of attack: 0.000 degrees angle of yaw: 0.000 degrees ijk_range subregion inflow region 4 zone 1 range: (1:49,4:4,1:1) mach number: 0.140 static pressure: 14.017 psi static temperature: 500.130 deg.
	www.grc.nasa.gov /WWW/wind/valid/anduct/anduct.A.lis (1290 words)

	Description of Mission
		A key parameter in the ACS algorithm that governs the orientations of the altimeter antenna and the solar array is β'(betaprime), the angle between the orbital plane and the sunline.
		When β' is between 0º and 15º, the satellite yaw angle is maintained at 0º, which means it flies forward with its bow pointed in the direction of motion.
		When β' is between -15º and 0º, the satellite yaw angle is maintained at 180º, which means it flies backward with its stern pointed in the direction of motion.
	www.tsgc.utexas.edu /spacecraft/topex/atti.html (277 words)

	Spherical Interpolation - Tutorial - Developer Zone - National Instruments
		The range is 0 to 360°, where angle 0 is along the positive X’ axis and values increase counter-clockwise from the positive X’ axis in the X’Y’ plane.
		It is specified by a radius, starting angle, and travel angle, and, like all vector space moves, uses the loaded value of vector acceleration and vector velocity to define the motion along the path of the arc in the X’Y’ plane.
		Its orientation is with respect to the XYZ vector space and is defined in terms of pitch and yaw angles.
	zone.ni.com /devzone/conceptd.nsf/webmain/C400E9E39D45CBBD06256858006D12CE?opendocument&node=dz00000_us (617 words)

	Snipers Paradise
		The Magnus force vanishes in the absence of rotation and in the absence of a yaw angle.
		For spin-stabilized projectiles M W tends to increase the yaw angle and destabilizes the bullet.
		Explanation: The repose angle of yaw (or yaw of repose, also called equilibrium yaw) is the angle, by which the momentary axis of precession deviates from the direction of flight.
	www.snipersparadise.com /wound/formulas.htm (3594 words)

	Multi-Engine Flying [Ch. 17 of See How It Flies] (Site not responding. Last check: 2007-10-11)
		The deflection of the string is proportional to the airplane’s slip angle, that is, the angle of the X-axis relative to the free-stream relative wind.
		The slip angle measures the angle between the fuselage and the relative wind, whereas yaw is defined relative to some fixed spatial direction.
		That is, in case (i) the airflow strikes the whole airplane (including the rudder) at a nonzero angle, while in case (ii) the airflow strikes the airplane at a zero angle, with the rudder deflected.
	www.av8n.com /how/htm/multi.html (13311 words)

	OhioLINK ETD: BAI, XINWEN (Site not responding. Last check: 2007-10-11)
		An experimental investigation was undertaken to examine the effect of cavity depth and yaw angle on flow oscillations that occur in an open cavity placed within a subsonic boundary layer.
		Pressure time histories were acquired at five separate cavity depths (or L/D values) at each yaw angle from 5 degree to 90 degree using microphone-type pressure transducers.
		This study indicates that large changes in the pressure level occur as L/D varies from 0.5 to 2.1 and as the yaw angle varies from 5 to 90 deg.
	rave.ohiolink.edu /etdc/view?acc_num=ucin1064410395 (196 words)

	Laboratory for Computational Vision
		An extensible user interface will allow the user to define two parameters: the mesh to view and the angle, given in pitch and yaw, at which to view the scene.
		The pitch and yaw will be relative to the negative z-axis (the default viewing direction.) Eye position will be set statically at the origin and the up direction of the camera will be determined automatically.
		The translation space for the mesh given by the user is from -2.5 to 2.5 in X and from -7 to -2 in Z. This means the mesh translates within a 5x5 square where the square is divided into 100 increments in width and 100 increments in length.
	lcv.stat.fsu.edu /research/geometrical_representations_of_faces/INTERSECTION_IMAGING (588 words)

	Yaw Angle (Site not responding. Last check: 2007-10-11)
		Effect of yaw and angle of attack pressure recovery and mass-flow characteristics of a rectangular supersonic scoop inlet at a Mach number of 2.71
		The angle of deviation between a vehicle's longitudinal axis and its true direction...
		Explicit and implicit calculations of turbulent cavity flows with and without yaw angle (SuDoc NAS 1.
	www.yawangle.info (309 words)

	R/C Soaring: Calculation of the Equivalent Dihedral Angle
		The arrangement and amount of these angles determines in part the roll moment generated by the wing as a function of yaw angle.
		Translated, this is the coefficient of roll moment due to yaw angle.
		The dihedral angle of a V-dihedral wing is measured from the horizon to the wing, where both wings are at the same angle to the horizon.
	www.rc-soar.com /tech/spiral_eda.htm (633 words)

	[No title]
		roll = 0.0; ThreeVec nx = ThreeVec(n2.get_y(),-n2.get_x(),0.0); yaw = nx.phi(); } // general case, calculate both yaw and roll angles else { // There are two possible solutions, check which one is correct with // the x-component of the rotated n1 unit vector.
		The goal is to define // a set of angles which are consistent with globalToLocal and localToGlobal // operations.
		yaw = n1.phi(); // selfconistent phi n2.rotate(0.0, -pitch, -yaw, 1); // undo pitch and yaw ThreeVec nx = ThreeVec(n2.get_y(),n2.get_z(),0.0); roll = nx.phi(); // roll is left.
	www.triumf.ca /project_ETA/gismo/Volume.cc (1867 words)

	camera movement - GameDev.Net Discussion Forums (Site not responding. Last check: 2007-10-11)
		pitch yaw etc, all you have to do is a simple float copy so there
		Posted - 1/5/2004 7:02:02 AM If I store yaw pitch and roll like you said I will not be able to turn the camera relative to its own axi, but only the world.
		But I do think it is a good idea to use vectors instead of the matrices.
	www.gamedev.net /community/forums/topic.asp?topic_id=199766&whichpage=1� (807 words)

	Yaw angle - GameDev.Net Discussion Forums
		i need to find the angle between a NPC charcter and the vector from him to the player so i can rotate him towards the player.
		Make sure they are both have a length of 1 first, however, or you'll get funny results.
		For example, if you want +z to be forward when yaw = 0, you might construct the forward vector like this:
	www.gamedev.net /community/forums/topic.asp?topic_id=342677&whichpage=1� (445 words)

	TV3D :: Search
		Forum: General Discussion Posted: Sat May 08, 2004 5:46 pm Subject: Camera.Setrotaion YAW angle ??
		I will stick with the easy way for the moment like sylvain said.
		What ever i do, i don't seem to uderstant how the camera works but I'm sure this is really simple.
	www.truevision3d.com /phpBB2/search.php?search_author=zork (745 words)

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