Aircraft Engine Data Manager 740 for experimental aircraft is an awesome product that is innovative and aggressively priced. Starting at $2899 for a 4-cylinder installation and $3250 for a 6-cylinder one, the EDM-740 covers all the basics that a pilot requires to fly the aircraft safely. This includes the most of the popular sensors. Optionally you can add turbine-inlet temp, electrical-bus current, carb temp and fuel pressure sensors. Also, if you have the sensors installed, it can also read resistance or capacitance of fuel-level senders. Similar to earlier EDM’s, the EDM-740 stacks EGT and CHT Monitors so you can view all cylinders at on go. Also, the EDM-740 display will automatically self-adjust when used in a 4-cylinder aircraft or 6-cylinder aircraft. Unlike EDM’s manufactured by others, there are no “missing bars”. Also, you can choose the order of the subordinate menu display. Fitting your new EDM-740 is a breeze. The EDM-740 requires just 3.125” of space. The panel is just 2-inches deep and the faceplate is 4.23(h) by 3.195 (w). You can even re-orient the display to suit your requirement. Key features of the EDM-740 include: 1. User-defined upper and lower limits, alarms. 2. Large single-line display that magnifies the values of other indications. 3. LF button on faceplate for Lean Find. 4. In default mode, single press of LF button will display ROP and enter lean-find mode. 5. The EDM-740 is equipped with an engine-power calculator. 6. The EDM-740 has a faceplate mounted LDR (ambient light sensor) which in turn automatically adjusts the display intensity so that even cross-cockpit, the 740’s display is clear and legible right down to the smallest menu item. 7. Incredibly fast response – whatever manoeuvring you do, the display indicates exactly what is happening in the engine in a manner that is easily digestible to a pilot. 8. The EDM-740 also integral data logging for roughly 200 hours (at the rate of once every 6 seconds). Functions include: • RPM Propeller • MAP Manifold Pressure • % HP Percent of Horse Power • EGT Probe Exhaust Gas Temp. • CHT Cylinder Head Temp • O-T Oil Temperature • O-P Oil Pressure • OAT Outside Air Temp. • VDC Voltage • GPH Gallons per Hour REQ Required to destination • USD Fuel used • H:M Endurance • MPG Miles per Gal • CLD Shock Cooling on all cylinders • DIFF Gami spread • USB Memory stick Data Recording • EZ Trends Graphing program Optional functions include: • TIT Probe Turbine Inlets Temp • F-P Fuel Pressure • CDT Compressor Discharge • AMP Current amps • CRB Probes Carburetor Temp • L-Tank Fuel Quantity, level • R-Tank Fuel Quantity, level For more information on J.P. Instrument’s EDM 740, please visit: https://www.jpinstruments.com/shop/edm-740-experimental-only-3/
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There are many parts and components in an aircraft that do not generate their own heat and instead, rely on heat generated from the engine. Of all these non-heat-generating components or parts, the aircraft carburettor is perhaps the most vulnerable to humidity and low temperatures. The freezing of the aircraft carburettor would not just impede the smooth functioning of the engine, it will ultimately stop the engine from functioning! To prevent the above from happening, an anti-icing system that preheats the air before it reaches the carburettor is put in place. This is intended to keep the fuel-air mixture warm enough so that freezing does not occur and the carburettor is kept free of ice. Despite this, higher humidity levels coupled with abnormal temperature variations when flying in certain locations and height, can cause the carburettor temperature to drop and ultimately freeze. As the ultimate fail-safe, the pilot(s) must be able to detect temperature drop of the carburettor and this is achieved via the Carburettor Temperature Probe (CRB) connected to the Aircraft Engine Monitoring Systems. When temperature drops, pre-heat can be switched on to prevent the freezing of the carburettor. Carburettor Temperature Probe is a sensor mounted directly on the carburettor wall and detects temperature drop. This, along with other indicators (e.g. rough sound, drop in rpm etc) serve as a warning to the pilot(s) of impending disaster. Modern CRB probes especially those manufactured by J.P. Instruments, are meant to withstand effects of humidity, Oil Temp Probes, gasoline, as well as wide temperature variations. The sensing coil within the CRB is fully coated in an epoxy resin which itself is within a metal tube thick enough to withstand repeated backfires, but thin enough to be highly sensitivity to temperature change. When the CRB probe is fitted, care should be taken to fit it gently but firmly and without using harsh tools such as pliers. The tightening torque should be no more than 4 foot-pounds. Only one spacing washer can be used, and should contact the carburettor casting, with the lock washer in contact with the shoulder on the probe. Allow sufficient slack for the wires of the probe. If the probe does not reach all the way into the carburettor barrel, the counterbore can be used again to reduce the thickness of the casting slightly at the outside of the hole. Recommended torque is 3 to 4 foot-pounds as anything more than this will likely damage to the threads in the carburettor or the probe. For more information on aircraft CRB Probes, please visit https://www.jpinstruments.com/shop/crb-probe/ The EDM 350 Aircraft engine data manager by J.P. Instruments measures precisely 3.25 square inches i.e. smaller than a standard sized stapler and yet, it this little gadget is packed with electronic chips that analyse over 2 dozen different engine parameters of any 4-cylinder aircraft. The basic 4-cylinder kit starts at just $798 while the 6-cylinder kit is priced at $988. Both representing true value for money. Fitting the EDM 350 is as easy as can be. All you need is a 3.25 square inch empty space. First attach all the probes to the engine and thread them out of the empty space, similarly add the wires. Next attach the probes and wires to the EDM 350 and ‘plug-in’ the EDM 350 Aircraft engine data manager into the empty socket. That it, you’re good to go. Features and specifications of the EDM 350 experimental engine data manager by J.P. Instruments includes the following measurements and display: 1. EGT - Exhaust gas temp. 2. CHT - Cylinder head temp - probes and harness included. 3. VDC - Voltage display. 4. CLD - Shock cooling on all cylinders. 5. ROP/LOP - Lean finder. 6. DIFF - Engine health. 7. USB Port - Convenient data port for quick and easy download of engine data. 8. Internal Memory - Enough memory to record 600 hours of data (recorded every 6 seconds). 9. EZTrends Software - Graphics software with Google Earth location included. 10. RPM - Prop rotation speed. 11. MAP - Engine Manifold pressure. 12. O.T. - Engine oil temp. 13. O.P. - Engine oil pressure. 14. F.P. - Fuel pressure. 15. OAT - Outside air temp. 16. TIT - Turbine inlet temp. 17. CRB - Carburettor temp. 18. CDT - Compressor discharge temp. 19. AMP - Battery load output in amps. 20. L-R-Main - Fuel quantity in all tanks. 21. V-2 - Second volts readout. 22. Amp-2 - Second load readout in Amps. 23. % HP - With FF, OAT and RPM Sensor. 24. FF - Fuel flow includes: • GPH - Gallons per hour. • REQ - Fuel required to way point / destination. • USD - Fuel used. • H:M - Endurance in hours and minutes. • MPG - Miles per gallon Notes: 1. EGT Gauges must be mounted 2 to 4 inches from aircraft cylinder head. 2. If EGT clamps are too short, please buy larger clamps (available with J.P.I) 3. If 3. If EGT Probes appear to be lose, please remove the probe, squeeze the thimble and reassemble. 4. Existing TIT Probe cab be used only if the aircrafts TIT probe has the same type thermocouple. For more information on EDM 350 Aircraft Engine Data Management by J.P. Instruments, please visit: https://www.jpinstruments.com/shop/edm-350/ |
AuthorJ.P.Instruments was founded in 1986 in Huntington Beach, California, USA. Its founder, Joseph Polizzotto, is now the current CEO. Archives
May 2019
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