ground loop


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ground loop

[′grau̇nd ‚lüp]
(aerospace engineering)
A sharp, uncontrollable turn made by an aircraft on the ground during landing, taking off, or taxiing.
(communications)
Return currents or magnetic fields from relatively high-powered circuits or components which generate unwanted noisy signals in the common return of relatively low-level signal circuits.
(electricity)
Potentially detrimental loop formed when two or more points in an electric system that are nominally at ground potential are connected by a conducting path.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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Simplex burner.
i. An uncontrolled turn on the ground either on takeoff or, more often, on landing in a tail-wheel aircraft. Also called a ground loop
ii. To turn a propeller by hand to start the engine.
iii. To calibrate compass deviation by recording its values at predetermined intervals and correcting the deviation to the extent possible.
iv. The sudden yaw of a multiengine airplane when one of the engines, especially the one away from the centerline, fails.
v. In aerial photography, it is the angle measured in the plane of the photograph from the positive y-axis clock-wise to the nadir point.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved

ground loop

A circular path created between the data lines and the ground wires when electronic devices communicate with each other. When systems have earth grounds through different power sources, differences in reference voltages can cause problems for various reasons (see inter-system ground noise). See ground.


The Ground Loop
The ground loop is created because all the equipment is wired to earth ground.
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References in periodicals archive ?
The [[PI].sub.2] group is then readily calculated from Equation 7, and [[PI].sub.3] is then determined from the surface fit correlation (Equation 9), allowing calculation of the total ground loop length (L) from the [[PI].sub.3] expression described by Equation 8.
Figure 1 indicates this ground loop design was successful since leaving water temperatures (LWTs) are below 80[degrees]F (27[degrees]C) and entering water temperatures (EWTs) are below 85[degrees]F (29[degrees]C) on a day that exceeded the design outdoor air temperature (OAT).
In order to develop suggestions for the optimization of the summer recharge of the ground heat exchanger, three different surface treatments were applied over the ground loop. The loop field is broken into three sets of two loops and each set of loops has a different surface treatment: dark rocks, light colored sand, and grass.
Beginning January 2002, the company launched its marketing of the traditional ground loop application.
"But site conditions may determine whether to drill a vertical well or install a horizontal ground loop." Site conditions affecting system design include lot size, ease or difficulty of soil excavation, aquifer characteristics, groundwater levels, and proximity to a lake or pond.
Ground loop heat exchange piping was cost-effectively installed in almost 50% of the building's grout-filled steel pipe piles that provide structural support for the building.
The system can be expanded to larger scales with adding the modules to the ground loop. Applicability of the system to various climates may be high since its heat sources and sinks are native to the earth.
I decided my only option was to go into the overrun and ground loop the jet.
A loop of plastic pipe (ground loop) is placed in the bore holes and a water/anti-freeze mix, connected to a heat pump unit, is then circulated around this circuit.
A flashing green LED light verifies the clamp connection and low-resistance ground loop. The system is used whenever the possibility of a small static spark may ignite flammable vapors, gases, or dust atmospheres.
Geothermal systems have three main components: the ground loop, which gathers heat; the heat pump, which condenses the heat; and the duct system, which distributes the heat.