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Aerohydro Consulting
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Ever missed something important in your cockpit checks or scan that could have put you in danger? With the ever-increasing pressures of flying in busy airspace, it’s too easy to do. Military and commercial aircraft have sophisticated monitoring and warning systems which watch the pilot’s back while he or she focuses on demanding flight tasks where 100% attention is required, inside or outside the cockpit. In GA, light-sport aircraft and experimentals, system monitors and cockpit warnings are often a mixed bag of individual warning lights or indicators scattered around the cockpit where they happen to fit. And while flat-screen displays can show a multitude of systems data and warnings, these are often densely packed and over-complex and abnormalities are easy to miss. And what about those situations where your early attention might avert a worse one developing? An actual fire might be difficult to miss, but what about high oil temperature or CHT, being in the wrong configuration or over speed, or fuel or oil running low, or low volts or vacuum? Might it be helpful too to be prompted to put your pitot heat on when icing becomes a threat, or to put your oxygen on as cabin pressure falls? Depending on your aircraft type, there will be other potential killers that could sneak up on you unnoticed. You’ve spent a lot on your machine, so spending just a little more for a system that alerts you when things need attention and helps to keep you and those with you safe, makes good sense. Any examination of FAA accident reports illustrates the point well: even the most experienced professional pilot can mess up! So we part-time, low-flight-hour aces might just need a bit of extra help.
A configuration file defines the alerts by applying logic to defined states, threshold values or an envelope of flight, engine or aircraft configuration data. A basic implementation example may include Oil Pressure, Oil Temperature, Low Fuel, Alternator, Starter, Doors and Hatches, Gear unsafe, Voltage and Alternator alerts. These basic alerts can all be generated using directly connected switched and analogue inputs. A simple configuration file maps these to the illuminated captions and voice alerts and consolidates alerts into a Master Warning/ Caution switch. More advanced alerts can be generated when flight and engine data is added through connection to an EFIS or engine monitor. By combining aircraft configuration data with flight and engine data, Envelopes and Profile alerts can be generated. Examples include recognizing that the landing gear should be down based on airspeed, rate of descent and Height AGL, that oil pressure is too low for the current RPM, that airspeed is outside of the envelope for the current aircraft configuration or that oxygen should be on above a specified altitude. Careful thought has gone into human factors with auto mute on startup to keep the cockpit quiet when you turn on the master switch and adjustable damping on alert triggers to prevent transitory events causing unnecessary alarms. If your EFIS data feed is off or faulty, the system generates a voice alert to let you know. The optional AH501 Master/Caution attention-getter / acknowledgement switch helps to draw the pilot’s attention to an anomaly, its switch turns unacknowledged captions to steady and mutes the audio. Custom legends, voice alerts and basic configuration are all included. The unit measures 10.8in(275mm) by 0.67n(17mm) and has a panel depth of 1.35in(34mm)
Programmable voice and visual alerts Switch state, threshold value, profile and envelope alerts 8 captions and up to 64 voice clips Auto mute on start and alert damping prevent unnecessary warnings Full direct-sunlight readable display with automatic dimming Integration of remote Master Caution/ Master Warning 2 RS232 Interfaces to EFIS, engine monitors or AH504 expansion unit SD Card for ease of configuration and audio changes 8 switched and 2 analogue inputs Power 10-32V DC 2-year warranty
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