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.

swing

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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.

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.
References in periodicals archive ?
Modelling of vertical ground loop heat exchangers for ground source heat pump systems.
The study also stresses the advantage of hybrid GHPs in areas of limited land availability, and suggest a design procedure, which sizes the ground loop for the heating loads, and size the supplemental heat rejecter for the difference in the cooling load.
A flowchart for the computer algorithm of the improved ground loop heat exchanger model as a TRNSYS component type is shown in Figure 4, and the component model configuration of the ground loop heat exchanger model and ground thermal response only model is shown in Figure 5.
When the minimum temperatures are equivalent from year to year, the system is considered optimized, and the ground loop length is at a minimum.
The ground loop is sized to meet the building heating loads while the cooling load in excess of the heating load is met through supplemental heat rejection.
The current dual unit ISO Standard 13256-1 is a departure from the three traditional Air Conditioning and Refrigeration Institute (ARI) standards formerly used to rate water-to-air heat pumps by application: water loop (ARI 320), groundwater (ARI 325) and ground loop (ARI 330).
Following the design of the system a more refined 3-D simulation was created to look at the long term effects of the varying landscape choices on the heat recovery of the ground loop.
2] can be estimated from the temperature of the water exiting the ground loop at restart.
Austin is fortunate enough to have several experienced ground loop installers as well as a number of qualified technicians.
Designed specifically for point-to-point coupling with 150 Twinax cable, these small transformers protect the station from static charges that may develop on the cable and prevent ground loop currents from being transferred between stations.
It has been used to recover conversations lost due to low-level recordings, malfunctioning equipment, environmental noise, and ground loop connections.
A ground loop geothermal version of the system, designed around standard Bosch Thermotechnology equipment, was recently incorporated into a zero-net-energy residence known as the ROSE Cottage Project, which was designed by The H L Turner Group Inc.