Plane & Pilot
Wednesday, October 1, 2008

Analyze This

Today’s engine analyzers can help you lower costs and fly more safely

No matter how modern an airplane’s engines and systems are, predictable power is ultimately a pilot’s personal responsibility. We rely on engine instrumentation to ensure safe flight, but we also like to optimize engine operations (for example, speed, distance or lifetime economy). The right information, reliably transmitted and interpreted, can save money and time, and prevent awkward situations.
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The AuRACLE CRM2100 from Xerion Avionix.
Insight Instruments
The original GEM (graphic engine monitor) has had countless followers since its introduction in 1979, and the GEM Series G3 will replace it and expand its function a hundredfold. The full-color G3 retains all the functions of the GEM 602/603/610, but adds significant new capabilities, including lifetime data logging of all traditional parameters as well as engine vibration, propeller balance, landing shocks and internal solid-state G-sensors. By interfacing with your GPS, the G3 allows tracking of routes and winds aloft. Easy updates and data logging via an SD card enable future upgrades over the Internet, with no special software required to read the data. You’ll see a display of rpm, manifold pressure, CHT, EGT, peaks and warnings, oil temp and pressure, fuel flow, OAT and voltage. The G3 fits in a 2.25-inch hole and projects roughly four inches behind the panel, providing for a compact installation. The six-cylinder model (four- and nine-cylinder versions are also offered) markets for $3,200, including probes. GEM trade-up allowances are available. Learn more at

J.P. Instruments
The EDM-700 and EDM-800 are high-performance engine analyzers that have had years of development and still hold a large piece of the market, due to their robust construction, full information and unique features. J.P. Instruments President Joe Polizzotto says, “You want all cylinders on the lean side, but not too far, and the EDM shows each cylinder as it goes over peak EGT. We fly our Mooney 231 at 10 gph and 180 knots from Scottsbluff, Neb., to Los Angeles, Calif., on one tank.” The pilot-friendly programming is evident in the clear monochromatic display. Data logging is automatic and its interval is adjustable; it’s enhanced through free EzTrends software. The 800 is a “loaded” version of the 700—oil temperature is the only option left. The six-cylinder EDM-800 retails for $3,995. Learn more at

analyze this
Avidyne’s EMax on the FlightMax Entegra EX500.
Xerion Avionix
At Sun ’n Fun 2008, Xerion introduced its AuRACLE CRM2120, the twin version of the screamingly successful CRM2100 and CRM2101 graphic monitors. The entire CRM series uses a unique display to put a lot of information comprehensibly on a small screen: rpm, manifold pressure, CHT, EGT, fuel flow, OAT, volts and amps, calculated horsepower and a number of user-programmed functions. The Xerion AuRACLE is certified for all four- and six-cylinder Beech Bonanza, Cessna and Piper aircraft. One of Xerion’s goals is to replace as many old systems as possible while aggressively chasing the OEM market. (Its plug-compatible CRM2101, for instance, directly replaces the J.P.I. EDM-700 while adding other functions.) The CRM2120 isn’t simply a “double” CRM2100; its twin screens can function independently, be flip-flopped or even be combined at the pilot’s command. The four-cylinder CRM2100 costs $6,995, and the six-cylinder version costs $7,495. If you’re upgrading systems that are already on board and compatible, reduce those prices to $5,650 and $5,926, respectively, for the CRM2101. At this writing, prices for the CRM2120 are still in the works. Learn more at


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