FLIGHT INFORMATION

• ASI (Airspeed Indicator). 16-200 mph. ASI or TAS (True Airspeed) selectable. Range from 16 mph to 200 mph, user calibration possible to cater for pitot tube placement.
• Altimeter. 0-40,000 ft, certified by MGL Avionics, traceable to British national standards. 7.5 ft static resolution, 1 ft dynamic resolution. Full barometric pressure adjustment, including 'ground elevation' setting. User calibration function. The static resolution applies in still air with the unit stationary at sea-level. The dynamic resolution is available with the aircraft moving. This resolution has been made possible by mathematically evaluating the turbulence created around the aircraft. The unit uses a micro machined silicon diaphragm sensor and an absolute vacuum reference of highest stability and accuracy. The altimeter is doubly temperature compensated and uses true ratiometric signal acquisition circuitry. The altimeter can operate in increments of 1 ft or 1 meter. Barometric settings are displayed mb(hp) or in/Hg.
• VSI (Vertical Speed Indicator). 0 to +/-9,999 fpm (digital) and 0 to +/-2,000 fpm (graphical). Deadband 20 fpm resolution (1 ft/min internally). Altitude compensated. Units can be indicated in fpm or m/sec.
• Flight Duration. Duration of current flight from takeoff (using Automatic Flight Detection) or from manual Start-of-Flight input.
• Glide Ratio indicator. Range from 0 to 99. Whenever the instrument detects that you are gliding you get a display of your glide ratio, i.e. the ratio of your distance traveled forwards vs. your vertical sink speed. Uses True Airspeed (TAS) for maximum accuracy.
• Climb Ratio indicator. Range from 0 to 99. Shows ratio of climb to forward movement. Useful to establish best rate of climb vs. best angle of climb performance of your aircraft.

ENGINE INFORMATION

• Exhaust Gas Temperature (EGT). Four channel precision thermocouple amplifier for EGT and CHT probes. Can use K type and J type senders, in grounded or isolated configurations. Fully cold junction compensated and includes low voltage correction.
• Cylinder Head Temperature (CHT). See EGT above. (Two channel NTC input for Rotax 912/914 CHT senders).
• Water Temperature. Water temperature sender input. Indicates in deg C or deg F.
• Oil Temperature. Accepts Rotax 912 standard sender and others.
• Oil Pressure. Configurable to senders from 50 to 1,000 ohms (Rotax uses 200 ohm sender).
• Engine RPM. 0 - 9,999 RPM. Universal input. Suitable for any engine, even those with odd numbers of pulses/rev. Pickups are from Rotax ignition, magnetos, via capacitive coupling from spark-plug lead or from IR reflective sensors (for example direct from prop). Can be setup for a wide variety of engines - not just Rotax.
• Engine Hours. Rev sensitive hourmeter. Counts to 9,999 hours with a resolution of 1 minute. Can be reset to zero (eg: when fitting a new engine).

ADDITIONAL FUNCTIONS

• True Airspeed (TAS). Selectable instead of the ASI reading for accurate TAS readings.
• Density Altimeter. This secondary altimeter shows the density altitude at your current location taking pressure altitude and ambient temperature into account. This in turn can be used to calculate your aircraft's takeoff run for your current local conditions.
• Takeoff Length Measurement. The unit includes a semi-automatic takeoff length measurement mode. This establishes your aircraft's takeoff length in meters to clearing the standard 50 ft obstacle. This is a very useful feature for aircraft designers but also for the owner who wants to optimize his aircraft's performance. And it can also be used to optimize climb performance if you have a pitch-adjustable propeller. In this case the unit is used to measure the forward air distance required to gain 50 ft of altitude.
• Air Distance Made Good. This is a resetable trip distance counter based on TAS and time. The instrument can be setup to reset the Air Distance counter automatically on the start of a flight.
• Automatic Flight Detection. This function detects the commencement of a flight and starts recording it. It is also possible to set the instrument to record flights based on manual start/stop only.
• Stop Watch. A stop watch is provided that can be used as a flight leg timer or for navigation. Functions provided are start/stop and reset. Range is to 99 hrs, 59 mins.
• Maintenance Counter. This pressetable counter counts engine time down. Can be used for maintenance tasks such as spark plug replacements, engine maintenance, etc.
• Fuel Level Display. This uses a standard automotive float level sender (not included - available everywhere at low cost). VDO part # 220-003 recommended. The instrument has a calibration procedure that recognizes the tank shape and fuel capacity. This results in direct, accurate readout of remaining fuel in liters or US/Imperial gallons.
• Fuel Flow Display. This uses an optional fuel flow sender. Resolution is in liter/hour (with decimals). This sender can also be used to calculate fuel level if no fuel level sender has been installed. In this case the initial tank level is manually entered in liters or US/Imperial gallons and the instrument calculates remaining fuel.
• Time of Day. Displays current time in hours and minutes. Can be used to display UTC.
• Flight Log. Every flight is stored in a log for later retrieval. The log contains up to 240 flights. Each flight stores date and time of take-off, duration of flight, maximum speed and altitude reached. In Instructor/Lesson mode a log entry stores a Lesson, even if made up of multiple flights. Each lesson can be stored under a student number.
• Voltmeter. Displays current system voltage. Useful to check for charging/overcharging of batteries.
• Barometer. A barometer has been included to show local atmospheric pressure in mb(hp) or in/Hg. This barometer is a precision instrument with a range of 200 mb to 1,200 mb.
• Air Distance Range Remaining. Air distance range gives calculated range remaining based on current True Airspeed (TAS), fuel flow and fuel remaining. This, together with Bingo Fuel Time is one of the most useful functions of the Stratomaster Flight instrument.
• Bingo Fuel Time. Bingo Fuel Time Estimate gives remaining fuel range expressed in time based on fuel flow and fuel remaining.
• Instructor Mode. The instrument can be setup to record "lessons" rather than individual flights. Lessons are subject to a number of criteria for accumulation of time. Please view the manual for details and options.
• Ambient Temperature. An accurate semiconductor sender is included with the instrument.

ADDITIONAL SYSTEM SPECIFICATIONS

• RDAC IV (Remote Data Acquisition Computer) EMS (Engine Monitoring System). The engine capture module (pictured right) is a self-contained unit with its own processor. It can be conveniently mounted near the engine, which means that no engine senders need to be run all the way to the cockpit (makes installation easier). RDAC IV has a direct connection to the Stratomaster Extreme display. It simply plugs into the RDAC socket of the instrument and comes std with 10 ft of cable and connector.
• Power supply protection - the instrument contains a fast Tranzorb to prevent destruction by spikes caused by inductive loads. Further to this two independent watchdogs are used to detect software malfunction (crashes) to facilitate automatic recovery.
• The unit can operate for about 12 hours on a 9V PP3 battery (alkaline) if the display back light is disconnected (there is a setting for this on the rear of the unit). The unit can operate down to about 7 V. Normally, the unit will be connected to either 12V or 24/28V aircraft supplies. It is possible to use a 9V battery as emergency backup power for the instrument. This requires the installation of a simple two -diode decoupling bridge. Details on the required wiring are included in the manual.
• The instrument can be setup with a wide range of options such as metric, imperial or U.S readings. In addition most operational parameters are selectable by the user. Speed and distance readings can be shown in mph/knots/km/h and miles/nm/km respectively.
• Local area network. The instrument supports the Air-talk communications protocol to send and receive data to/from other instruments. It is also possible to connect a PC to the instrument via a special cable. A key-ring device can be used to download the log for later upload of the log to a PC. The Air-talk link is standard with every unit, download cable and key-ring interfaces are optional.
• Alarms - The instrument can generate alarms based on certain triggers. These are: Fuel level low, Air speed low, Air speed too high, engine temperature and Altitude ceiling. Alarms are indicated via EXTERNAL devices. The unit provides an uncommitted relay contact which closes/opens once a second during an active alarm. This can be used to switch a lamp (idiot light) and/or buzzer (not included).
• Audio Alarm Output - the unit can directly drive a 4 or 8 ohm panel speaker or in low level mode can inject alarm tones into a suitably fitted intercom system.
• Vario Output - this feature is intended for motor gliders. Using a suitable Vario panel it is possible to listen to your VSI. This allows you to keep your eyes outside of the cockpit when several gliders are circling in the same thermal - without loosing track of how you are doing.
• The unit contains a long life Lithium battery which is used to maintain the date and time settings of the realtime clock and other time related items.
• High contrast, wide temperature range LCD display with backlight. Backlight is standard and can be set to one of three modes: Always On/Always Off/Automatic (turns off after about 10 minutes if no RPM or other activity is detected).
• The unit has been designed to be immune to strong RF interference from a VHF radio. In addition, care has been taken to making the unit produce as little RF interference of its own as possible.
• Copper clad ABS housing for maximum EMI performance and light weight.
• The unit provides both static and pressure (pitot tube) ports.