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Stratomaster Maxi Singles (3.5 inch)
Our Exciting, New, Highly Innovative Instrument Range
Our extraordinary and very successful range of 2.25 inch Smart Singles instrument systems, now have larger siblings - the 3.5 inch Maxi Singles.
The Maxi Single instrument range is designed to fit a standard 3.5" instrument cutout. These instruments are based on our 2.25" Smart Singles with some slight variations. They have a larger custom made, high resolution graphics display panel (with backlighting) which provides excellent daylight readability, even in direct sunlight.
 The 3.5" Maxi Singles ranges (like their smaller siblings) aren't really singles at all ! - as many integrate up to three instruments in the one system - all displayed at the one time, usually in both numerical and bar graph format. Moreover, most Maxi's are able to display all parameters or just one. For example, the Altimeter/VSI displays either as an altimeter or as a combo showing both.
Each instrument is highly configurable. For example, the altimeter(s) support relative mode (altitude relative to some other altitude - for example your airfield) or msl mode (above sea level). Units can be feet or metres (ft/min or m/s for the VSI).
The Maxi Single Engine Monitoring Systems (EMS) are even more incredible instruments. Imagine - a complete system for engine monitoring in one 3.5 " instrument !
The quality of these very powerful instruments also leads the industry - with custom made ABS plastic housings, lexan panels, high quality graphics displays with back lighting, the very latest ATMega RISC processors and the utilisation of high quality components - for e.g., the Altimeter/VSI uses the most sensitive (and expensive) pressure sender available.
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Instruments in the Maxi Singles range:
Flight II - Complete Primary Flight System:
The Flight II is an ultra compact, complete primary flight system intended as main flight instrument
on smaller aircraft or as backup / secondary flight  instrument.
This 3.5” system provides many functions from Altimeter, Airspeed to Fuel level/flow, Engine
RPM and many secondary functions, including an automatic flight log.
The Flight II ‘s light weight, small size and high level of functionality in addition to excellent value
for money make it an ideal choice for many applications.
The Flight II makes an ideal companion to the Stratomaster E1 universal engine monitor (see below) for a
compact, low cost, yet highly functional and complete cockpit solution.
Check out the complete listing of the Flight II's functions:
1. Altimeter (-700ft to >40.000ft range)
2. Airspeed indicator (16-250 mph range)
3. Analogue VSI (+/-1600 ft/min range)
4. Digital VSI (+/-10.000 ft/min range)
5. Automatic flight duration timer
6. Real time clock for local time and flight log use
7. Fuel flow (with optional fuel flow sender)
8. Fuel level calculated from fuel flow
9. Fuel level obtained from optional fuel level sender
10. Multipoint fuel level sender calibration to compensate for odd shaped tanks and nonlinear
fuel level senders
11. Engine RPM gauge, programmable for different engine types
12. Engine Hobbs meter, can be preset to any hour/minute setting
13. Maintenance timer (MPI, plug changes etc)
14. Automatic flight log (logs last 60 flights)
15. Log viewer in instrument
16. Log download to PC or download key (optional accessories)
17. Temperature display (external ambient temperature probe included)
18. Density altimeter
19. Barometer (actual local pressure)
20. True airspeed (TAS display)
21. Fuel range based on TAS
22. Fuel endurance based on TAS
23. Stopwatch
24. User programmable units: mph, km/h, knots, ft, meters, litres, gallons
25. Times can be set to minutes or decimal hour fractions
26. Glide and Climb ratio indicator
27. Alarm on low airspeed
28. Alarm on high airspeed
29. Alarm on low fuel level
Download the manual for detailed information by clicking on the link below:
Flight II Manual flight II.pdf (file size 437KB) 
You will very surprised at how little it costs to get so much!
Altimeter (& VSI):
The top performing digital altimeter. Range to more than 40.000 feet (may also be configured to display in metres). Absolute as well as relative modes of operation. Accurate and high resolution.
The altimeter is available in several versions. A standard version and two encoding versions (serial & parallel interface) - allowing connection to a transponder (and/or compatible GPS system).
Standard Altimeter 3.5" (ALT- 3)
- 700 to 40,000+ ft range, 10 ft resolution, feet or metres selectable, absolute (msl) and relative modes. Includes a digital VSI display that can be switched off, if another VSI is available. Local pressure in millibars or inches of mercury selectable. Incorporates a static port.
Download the manual for detailed information by clicking on the link below:
Altitude Encoding Altimeter 3.5" (ALT- 4)
Specifications are similar to the ALT-3, but, the ALT-4 adds a parallel gillman code transponder interface.
Download the manual for detailed information by clicking on the link below:
ALT-4 Manual alt345.pdf (file size 349KB)
Altitude Encoding Altimeter 3.5" (ALT- 5 )
Specifications are similar to the ALT-3, but, the ALT-5 adds a RS-232 serial gillman code transponder interface with a selection of protocols. Supported protocols are Garmin/Trimble, IIMorrow and MGL. See the ALT-4 (above) for mode-c transponders without a serial interface.
Download the manual for detailed information by clicking on the link below:
ALT-5 Manual alt345.pdf (file size 349KB)
Vertical Speed Indicator 3.5" (VSI-2)
Complete your cockpit with a digital Vertical Speed Indicator (VSI). The VSI-2 features both digital and analogue displays, includes user calibration (for the perfectionist) and is altitude compensated. Digital range is ±10.000 ft/min (may also be configured to display in meters/second). Analogue range is ±2000 ft/min with logarithmic bar graph display.
Download the manual for detailed information by clicking on the link below:
Air Speed Indicator 3.5" (ASI-3)
This is a very good ASI, particularly when compared with the traditional mechanical alternatives. Most mechanical ASI's do very poorly at low airspeeds due to the tiny pressures available from the pitot tubes. With our silicon sensors we have achieved good sensitivity at the low end, whilst still ensuring excellent linearity over the whole speed range. This simply cannot be achieved with a mechanical solution.
The ASI-3 has a wide speed range of 14 knots to 220 knots with speed displayed in both digital and analogue form (bar graph - that can be configured for scale). Markers ('bugs') for Vs (stall speed, dirty) Vf (maximum flap speed) Vno (upper limit normal operating speed or maximum manoeuvring speed) and Vne are programmable. Speed can be selected to display in knots, km/h or mph.
It also incorporates several additional unique and very useful features:
An automatic flight log that stores the duration of the last twenty four flights;
A duration of current flight since take-off display; and
An air-distance made good counter (re-settable).
The ASI-3 has a standard static port.
Download the manual for detailed information by clicking on the link below:
ASI-3 Manual asi3.pdf (file size 214KB)
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Altimeter and Air Speed Indicator Combo 3.5" (ASX-2)
The unique ASX-2 combines our excellent altimeter with the wide range airspeed indicator of the ASI-3. This instrument is the ideal solution for limited space panels at an even more amazing price. Consider the ASX-2  together with perhaps a EMS-1 or TC-2 (or our 2.25" EMS-503 or EMS-582) for an unbeatable combination of utility, price, weight and size.
The ASX-2 altimeter/airspeed combo is a 3.5 ” instrument based on a precision altimeter and a wide range, sensitive airspeed indicator.
The altimeter conforms to ANSI standard atmosphere rules from –700 ft up to a minimum of 40.000 ft.
The airspeed indicator can show air speeds from 14 to 220 knots. The airspeed indicator and the altimeter can interface to a static port and the airspeed indicator is based on a standard aviation pitot tube. The altimeter can display altitude in feet or meters, local pressure can be set in millibars or inches or mercury. The airspeed indicator can be set to indicate speeds in knots, mph or km/h.
The ASX-2 is the ideal instrument for installations were panel space is at a premium.
Fuel Management System 3.5" (FF-3)
This very powerful unit contains both fuel flow and fuel level functions. Fuel level can be obtained from a standard fuel level sender and calibrated  similar to our other Stratomaster instruments. Alternatively, fuel level can be calculated from fuel flow. Also featured is; an alarm output for low fuel level; and a fuel endurance readout.
In addition, the FF-3 includes a "total fuel used" accumulator that can be reset to zero at any time. Fuel level is displayed in bar graph form with digital readout of remaining fuel. Fuel flow is displayed in digital form as quantity per hour. Units can be set to litres, US gallons, Imperial gallons, or pounds.
Download the manual for detailed information by clicking on the link below:
FF-3 Manual ff3.pdf (file size 297KB)
Also available for download are specifications and installation notes for the fuel flow sender(s) which is supplied with the FF-3, FF-2, and FF-3. Click on the link below to download the notes:
MGL Avionics FF (file size 452KB)
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Rev Counter/Hobbs Meter 3.5" (RV-3)
The RV-3 is not just a rev counter it is everything a rev counter should be! Fully programmable with hobbs meter and flight timer it can be used with high speed RPM pulses or very slow speed pulses. Universal RPM counter for engines as well as universal RPM counter for Gyroplane and Helicopter rotors.
This unit really is much more than just a rev counter and hobbs meter! It can be used as a dual rev  counter for twins and includes a hobbs meter, maintenance timer and a secondary, re-settable (rev based) engine running timer (useful for flight schools that charge on engine time). Read out is digital together with an analogue bar graph (selectable scale).
The RV-3 can also be used for Gyros/helicopters as a rotor speed indicator (with extra gear tooth pickup from a pre-rotator or hall effect sensor). It can be configured to operate as both an engine rev counter and rotor speed indicator.
The RV-3 features programmable pulses/revs to accommodate a wide variety of engines and it accepts A/C coupled signals.
Download the manual for detailed information by clicking on the link below:
RV-3 Manual rv3.pdf (file size 210KB)
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Temperature & Pressure 3.5" (TP-2)
Our universal solution for measuring water (coolant) temperature, oil temperature, oil or fuel pressure, the TP-2 can be used as oil or water temperature gauge or an oil or fuel pressure gauge - in each case, it can be configured to display both parameters at the same time. The TP-2 can also be used as a combined oil pressure and oil temperature gauge.
The TP-2 interfaces with standard  automotive pressure senders and can be adapted to a wide range of sender types. For fuel pressure, a standard automotive pressure sender can be used in combination with the isolation kit available from VDO.
For temperature inputs, standard NTC type automotive senders as well as our MGL Precision Temperature Probe (semiconductor type) can be used. Using our senders, this unit is well suited to displaying other temperatures, such as ambient temperature using our remote probe or crankcase / gearbox temperatures etc.
Alarm output is standard and units are configurable for bars or PSI (pressure) and degrees F or degrees C (temperature). Senders are not included.
Download the manual for detailed information by clicking on the link below:
Aviation G-Force Meter 3.5" (GF-2), tilt compensated, dual range:
The GF-2 is a 3.5 ” instrument which displays the acceleration forces acing on an aircraft. The GF-2 does not require mounting exactly in the aircraft's vertical axis as it is able to measure out of vertical forces (i.e. it can be  mounted in panels which are a little off vertical to the aircraft flying attitude).
GF-2 functions in brief:
1. Typical accurate range of 20G (from + 10G to - 10G);
2. Records maximum measured forces in permanent memory (both positive and negative);
3. Two independent cycle counters record number of times a preset force has been exceeded;
4. Short term memory for maximum force encountered (typically during a flight);
5. Clearly readable numeric display (10 G range, positive and negative);
6. Graphic display of force acting on aircraft (range 0-6.5G, positive and negative);
The two axis design of the GF-1 allows its mounting in sloped panels (i.e. where panel is not exactly vertical). It also has a quick calibration function (using Earth gravity) for operation at temperature extremes.
Download the manual for detailed information by clicking on the link below:
Manifold Pressure Indicator 3.5" (MAP-2)
The MAP-2 is a precision pressure gauge which can measure pressures in the range from 0.25 bars (3.6 PSI) to 2.5 bars (36.2 PSI). Pressure can be displayed in units of millibar, bar, PSI, Kg/cm2, inches of Mercury, millimetres of Mercury, kilo pascal (KPa) or atmospheres.
 The MAP-2 is primarily intended for use as a manifold pressure gauge, however, this accurate instrument can be used for many other applications as well.
Typical applications:
Engine manifold pressure, Turbo boost pressure, Barometer, fuel or oil pressure gauge (with additional isolation kit), pressure reference, airfoil research and testing.
Download the manual for detailed information by clicking on the link below:
Real Time Clock 3.5" (RTC-1)
The RTC-1 is a 3.5” format aviation Real Time Clock featuring a two time zone system, stopwatch, timer and alarm.
It is primarily intended to show UTC time (also known as Greenwich Mean Time, GMT or Zulu time) together with a  local time to facilitate ordinary ATC time reporting. Each time zone may be programmed with an additional hour offset to allow for summer time or similar variances. Local offsets may be added or subtracted. Stopwatch and Timers can be operated simultaneously to a programmable alarm, making the RTC-1 particularly suitable for sport flying competitions.
Time is maintained by an internal 10 year lithium battery, which can be replaced by the user.
Download the manual for detailed information by clicking on the link below:
Maxi Singles 3.5" - Engine Monitoring Systems:
With the introduction of its 3.5 inch range Stratomaster is extending the boundaries of small footprint EMS systems with the E-1 and the TC-2.
E-1 Engine Monitoring System
The E-1 universal engine monitor combines in one compact 3.5” format instrument all that is
needed to monitor most smaller aircraft engines from two-stroke ultralight engines to medium
sized four strokes such as those from Jabiru, Rotax, Continental and Lycoming.
Also most automotive engine conversions can benefit from the use of the E1 engine monitor.
The E1 combines in one compact 3.5” format instrument all that is
needed to monitor most smaller aircraft engines from two-stroke ultralight engines to medium
sized four strokes such as from Rotax, Continental and Lycoming.
The E1 can also be used with most automotive engine conversions.
The E-1 offers the following features:
1. Universal, programmable rev counter (engine RPM) with digital and analogue readout;
2. Programmable engine hobbs meter and running timer (flight timer);
3. Up to four thermocouple channels for EGT and CHT probes, fully programmable;
4. A water temperature or oil temperature monitor;
5. Oil pressure monitor; and
6. Rotax 912/914 mode with up to four EGT and support for the two built in CHT sensors.
All temperature monitors have user programmable alarm levels, oil temperature and water
temperature have both low and high temperature alarms. Oil pressure has both high and low
pressure alarms.
Many different probe types can be supported.
Download the manual for detailed information by clicking on the link below:
Quad EGT/CHT Monitoring System 3.5" (TC-2):
Ever wanted a totally flexible, one, two, three or four channel EGT or CHT monitoring system ?
Well the TC-2 is the total solution for any engine, big or small.
The TC-2 is a fully configurable EGT/CHT four channel display, with alarms. It can be used as single channel, dual channel, three channel or four channel display  unit. Each input can be used to display a CHT or EGT channel. Probe types can be configured for standard thermocouples, J or K types.
The display for each channel includes a bar graph (scale programmable) and a digital readout. Each channel can have a temperature alarm programmed. The unit includes an uncommitted relay contact output that can be used to switch an alarm light or buzzer as required.
The TC-2 does not include probes. Select these as required for the application from our range or use your own probes.
Download the manual for detailed information by clicking on the link below:
TC-2 Manual tc2.pdf (file size 151KB)
Show me the price list !
12 Channel EGT/CHT Monitoring System 3.5" (TC-3):
For larger engine or total temperature monitoring of all thermocouple sourced engine information, the 12 channel TC-3 is the answer!
The TC-3 thermocouple display unit is a 12 channel 3.5” instrument that contains all the features necessary to monitor EGTs and CHTs.
 The TC-3 can be configured to display up to 12 thermocouples (EGT/CHT) in an easy to understand bar graph format.
It can also indicate the current highest thermocouple reading for each group (EGT/CHT) by highlighting the individual bar graph and displaying its temperature, or it can be configured to “scanning” where the unit will cycle through each thermocouple, highlighting it as well as displaying its temperature.
Maximum temperature for each thermocouple is indicated by a solid line above the thermocouples bar graph. Each group of EGT or CHT thermocouples can also have an alarm output activated when a group alarm set point has been exceeded. This can be used to switch a visual alarm indicator such as a lamp.
The TC-3 is fully programmable by the user, making it the most powerful and flexible solution available.
Temperature probes can be common K or J type thermocouple probes as used in CHT or EGT sensors. Temperatures can be displayed in degrees C or degrees F and each channel has
a range of 0 degrees C to 1200 degrees C (32-2000 degrees F).
The TC-3 does not include probes. Select these as required for your application from our range or use your own probes.
Download the manual for detailed information by clicking on the link below:
Show me the price list!
Fitting your Maxi Singles Instruments
Our Maxi Singles instruments
are designed to fit a standard 3.5" instrument cut out. The  rear of the instrument has an octagonal shape, but, fits a standard 3.125" round hole.
Our E1 universal engine monitor is shown left and below.
After the cut out is made, each instrument is mounted into the panel from the front - by sliding the unit into the cut-out until the rear face of the instrument's hexagonal shaped front panel bears against the instrument panel. It is then aligned and secured with 2.5 mm to 3 mm (shank diameter) bolts or screws - like those which we can supply (see below).
The position of the holes for the screws which secure the instrument to the panel can be marked by carefully rotating a 3 mm drill in each of the four holes, removing the instrument, centre punching the positions and then drilling the holes. Whilst the holes are marked on the template, using the instrument to finally position and mark the holes (but, not drill using the housing as an aligning tool) is strongly suggested.
The instrument can then be reinserted and secured to the panel with four machine screws - knurled Allen key headed black machine screws are very effective and attractive. Do not over tighten the screws/bolts used to fasten the instruments, as doing so may fracture the housing - the nylock nuts or Loctite (see below) will prevent the screws/ bolts from loosening.
Depending on the panel material, (alloy or otherwise) and its thickness, the holes can be tapped (threaded) to suit the screws - which can be secured with Loctite. Where this method is unsuitable, the use of nylock nuts (anchored or otherwise) is an obvious alternative - noting that unanchored nuts would require accessing the rear of the panel to remove the instrument(s). Alternatively, metal anchor plates can be quickly and easily fabricated, tapped and fixed to the rear of the panel to retain the benefits of front removal and insertion, without the need to access the rear of the panel.
Placing (and removing) each instrument in position from the front of the panel is usually faster and more convenient than the more conventional rear insertion method.
Download a copy of the Maxi Singles dimension data (including cut out size) by clicking on the link below:
Maxi Single dimension data maxisize.pdf (File size 30KB)
Wiring Your Instrument:
Instructions on installation and wiring your instrument(s) are provided in the installation section of the user manual, included with each system. Please read these instructions carefully, as we have found that the vast majority of owner queries are about issues already covered in the manuals. If you happen to misplace your manual a copy can be downloaded or printed from our web site.
Two installation issues to particularly note are:
1. Ensure that the positive (+) supply wire from the aircraft's 12 Volt power supply is connected to the positive (+ 12 V) terminal on the rear housing of your instrument. It must not be connected to the adjacent negative (-) or ground terminal. If this does occur, the instrument will be damaged and no longer operate (such damage is not covered under warranty).
Some instruments (like Maxi Singles) source power (and other data inputs) through wires to a plug(s) inserted into a socket on the instrument's rear housing. In this case, the (-) or ground connection is a black wire emerging from the plug and the positive (+) connection is a red wire emerging from the plug. The positive (+) supply from your power supply must be connected to the red wire emerging from the plug. It must not be connected to the black wire [negative (-)] emerging from the plug.
2. Also ensure that the 12 volt light bulb/lamp (or LED), used for the visible alarm indication, does not exceed the maximum permissible load stated in the manual (generally a maximum rating of 1 Watt - see more detail below). Exceeding the maximum permissible wattage rating will cause the alarm relay contacts to fuse together and the external alarm light indication function will no longer operate (such damage is not covered under warranty).
Alarm contact permissible load data:
Maximum permissible current through alarm contacts: 500mA.
Maximum permissible voltage over alarm contacts: 50V.
Typical load for alarm contacts: 12V/1W lamp.
Allen Key Headed Bolts
We now have these attractive black or stainless steel machine bolts to fix your Stratomaster instruments to the panel. These small Allen key socket,  round headed bolts have 2.5 mm x 12 or 20 mm shanks and nicely complement our Maxi (20 mm length) and Smart Singles (usually 12 mm length) instruments and come with matching Nylock nuts.
Please specify if you would like to have these added to your instrument order.
Please Note:
Operation of Stratomaster Singles Instruments is the responsibility of the pilot in command of the aircraft. The pilot in command has to make himself/herself familiar with the operation and limitations of the Stratomaster Maxi Singles instrument(s) before commencing ground or flight operations. Under no circumstances does the manufacturer condone usage of this instrument for SFR flights.
These instruments are designed for use in ultralight, microlight, experimental and homebuilt aircraft as well as any aircraft that permit use of such (non certified) instrumentation under general or special operating permits.
Stratomaster Singles Instruments have Not been submitted to CAA or FAA or any of its agencies (or any regulatory authority in any other country) for any form of certification. Operation and installation of these instruments is subject to the relevant rules and regulations of your country and flight authority.
If any of the above is not acceptable to the pilot in command he/she must refrain from operating the aircraft or remove any Stratomaster Singles Instruments from the aircraft before commencing aircraft operations.
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