Avionics

You’ve purchased a new-to-you airplanewith a panel-mount IFR GPS — but the placard reads “VFR-only.” AsLarry Anglisano explained recently in AviationConsumer, you can upgrade yourunit to IFR (but you may want to sell it and start from scratch). Here’swhat it’ll take to make it happen. This article appears in the April, 2002 edition of AviationConsumer, […]

Click any photo for a larger image. The FAA recommends an annual inspection for youravionics and we recommend it highly as well. Well give you the gist of it andthen some in the words that follow. Next month, well also give you somelow-buck alternatives for test equipment to perform more detailed avionicssystem checks. By the […]

It is certainly awe-inspiring to witness the cascade of new avionicsthat are unveiled continuously. But what about the future? Whatcan we expect to see in the months and years ahead? Well, theblack box manufacturers are notoriously reticent about revealingwhat’s being cobbled up in their respective skunkworks; for onething, they don’t want to give away their […]

All ELTs have one thing in common, their main purpose is to notify potential rescuers(by different means) that an aircraft has run into a solid object and someone could be inneed of help. But the technology for doing this is in the midst of a big change. Most current ELTs operate at 121.50 and 243.00 […]

This is a five-part series on Active Noise Reduction in General Aviation. It came about because hundreds and hundreds of you have been asking good questions about ANR technology and its advantages in airplanes. This series is intended to provide G.A. pilots with a fairly technical and thorough understanding of this technology and the important […]

NOTE: Dr. Jim Yates provided substantial contributions to this section of ANR 101. Dr. Yates is Professor and chair, S.P.A. of John A. Burns School of Medicine, University of Hawaii, and principal of Audiology Associates Hawaii. Previous sections of this series have discussed active noise cancellation and the technical issues associated specifically with general aviation […]

In this section, we’ll be looking at the comfort and human-factors issues associated with ANR headsets. The ergonomics of the human head demand a wide range of adjustments to deliver comfort over hours of use. Optimizing the physical headset for pilot use Active pilots have been searching for ways to improve the physical aspects of […]

Looking at actual cockpit noise profiles, and how well aviation headsets cope with it In Section 2 of this series, you learned how engineers measure effectiveness of active noise canceling systems in the laboratory. But since we don’t fly in the lab, our emphasis will now shift to studying the actual noise spectrums in various […]

Understanding and comparing cancellation specifications Section 1 of this series dealt with the variables and complexity involved in canceling the repetitive and random aspects of airplane noise. It explained that although the basic elements of all active noise reduction systems are pretty much the same, the details of how they are designed and implemented has […]

A good place to start is with one of the most-asked questions that we receive from pilots: Don’t all active headsets work the same way…or do the same thing? The answer is a simple “yes”…and a much more detailed “no.” It’s yes because the principles of additive cancellation with out-of-phase sound is several decades old […]