Having acquired the Aircraft Engine Data Management System 700 (EDM 700), it goes without saying, that this awesome piece of equipment needs to be carefully handled and installed.

While the JPI warranty at the back of the instruction manual clearly states that JPI will replace defective parts under warranty, it does not cover mishandling or defective installation.

Care to be taken while installing the JPI EDM 700:

1. The JPI Aircraft Engine Data Management System 700 is packaged along with 4 screws. While fixing these screws, care should be taken to ensure that the four mounting screws should not penetrate the in ... Read more »

The Carburettor Temperature Probe (CRB) is used to detect temperature drop in the carburettor.

For successful ignition to occur, the air-fuel mixture has to be perfect and this can only happen at the right temperature. Now when fuel and air is mixed, the temperature inside the carb will drop dramatically and this is compounded due to external cold air and cold temperatures. Next thing you know – the carburettor is frozen solid – and this is not something you want to happen when flying; not by a long shot.

So, the carburettor is kept warm and steady at its ideal temperature through a rather ingenious way by installing an anti-icing syst ... Read more »

The best EDM that money can buy in under ten thousand dollars (U.S) for 4 or 6-cylinder aircraft engine with transducers and all? The answer has to be EDM 790 manufactured by J.P. Instruments, U.S.A.

It’s not just an advert claim, the Engine Data Management 790 system is truly the most advanced twin piston engine-monitoring instrument on the market. The EDM 790 has been TSO’s for quality and is rightly thought of as a Flight Engineer and Maintenance Manager that has your back covered.

Covers to 29 critical parameters

Armed with the latest microprocessor technology, the EDM 790 will monitor up to 29 critical parameters o ... Read more »

There was a time when portable watches used to be two inches in diameter and as much as three-quarters of an inch thick. These watches were kept in the pocket and taken out only when you needed to know the time.

We all know how these pocket watches evolved, became slimmer and turned into wrist watches. The display gauges in the aircraft cockpit underwent a near identical transformation except that; on the evolution time-scale, they evolved nearer the electronic revolution so instead of becoming slimmer versions of their earlier self, they turned into slim line digital gauges.

Naturally, the sensor that actually picked up the ... Read more »

The engine data monitoring system (EDM) 960 – the one manufactured by J.P. Instruments is available for all aircraft with 4, 6, 7, 8 or 9 cylinders engines. There are so many things in an aircraft that need to be monitored that in days gone by, there used to be a flight engineer whose job it was to keep an eye on the engine performance during flight.

But the flight engineer was only human and during long flights, it was easy to not notice some things. But being a machine albeit an intelligent one; the EDM 960 system electronically surveys everything it is connected to, and it does it four times a second. Nothing can escape its attention.

Som ... Read more »

For this article, we’ve selected to explain the working principles of the RPM standard sensor for the pressurized Bendix series (manufactured by Teledyne Continental Motors):

The RPM sensor is connected to the magneto. To understand the sensor let us first begin with the “why” of things i.e. why is the magneto required in the first place is:

A magneto is required to power the sparkplug. Every combustion engine (including those used in aircraft), have sparkplugs. These provide the ignition or fire required to ignite the fuel-air mixture in the combustion chamber. The sparkplug purpose and functioning are ident ... Read more »

Back in the days of WWII, aircraft cockpits had few dials (gauges) and each was connected to any individual part of the aircraft engine. As aeroplane design improved so did the number of gauges in the aircraft cockpit.

Overtime, the aircraft cockpit got so crowded with gauges that it was impossible to keep track of all the information that was being displayed. The pilot would look at the gauges that were critical to the flight and just eye-ball the rest and hope for the best. These gauges did not have any alarm system so, more often than not the flight crew usually found out about a problem the hard way - when the engines began to ‘coug ... Read more »

Just so there is no confusion, the RPM sensors we refer to, are the ones used for measuring the RPM of the Bendix Magneto or the Slick Magnetos in aircraft. Some aircraft use Dual Magnetos but Bendix Magnetos and the Slick Magnetos are more widely used.

One of the main reasons the Bendix Magnetos are popular is because they are easily overhauled and for any aircraft; this is a winning feature as it saves time and money. Amongst the most prominent companies that manufacturer highly accurate aircraft RPM sensors, is J.P. Instrument – they manufacture sensors for Bendix Magnetos as well as Slick Magnetos.

Jus ... Read more »

For the uninitiated, an oil temperature probe is required keep a check on the oil temperature. The oil temperature is vital to maintain its viscosity. A low temperature will make the oil useless whereas a higher than normal temperature will risk a whole lot more than just engine damage.

An oil temperature sensor is inserted into the aircraft engine (please see latter part of this article on how to install the oil temperature probe), and the wires are connected to the oil temperature indicator or EDM if your aircraft cockpit sports an EDM. If the EDM permits it, the pilot can pre-set an alarm for the oil temperature so an audio-visual alarm sounds ... Read more »

Called by various names including EDM (Engine Data Monitor), ECM (Engine Condition Monitoring) etc. these are essentially aircraft engine monitoring systems. These electronic monitoring cum display units are at heart, a very simple device and this article aims to explain in simple language, how these devices work.

There are two parts to any aircraft engine monitoring system:

1. The EDM / ECM itself and,
2. The probes

The probes:

If you have ever been inside the ICU of any hospital, you might have notice patients hocked up to a monitoring system. On the patient are attached various senso ... Read more »