How Do Airplane Fuel Gauges Work in an Aircraft?

Airplane Fuel GaugesAirplane fuel gauges are somewhat similar to vehicle fuel gauges in that they both indicate the quantity of usable fuel present in the fuel tank. However, airplane fuel gauges work at a more complex level simply because aircraft carry more than one fuel tank and they also have more than one engine. Besides, reading fuel levels becomes complicated due to the fluctuating fuel density resulting from the changing aircraft altitudes.

To explain the workings of an airplane fuel gauge in a simplistic manner: a float level gauge is fitted to each of the fuel tanks in the aircraft. These gauges feed the information pertaining to fuel level in each tank to magnetic couplings and potentiometers which in turn pass on the information to the aircraft fuel gauge. However, the sloshing liquid with fluctuating density in multiple tanks make the work of airplane fuel gauges quite complicated. Modern aircraft technology however, has been able to achieve an advanced level of accuracy in the complicated world of aircraft fuel level reading.

Basically, there are three types of airplane fuel gauges that are used in aircrafts of today, namely,

1) mechanical airplane fuel gauge
2) electric airplane fuel gauge, and,
3) digital airplane fuel gauge, which is the choice for the latest model of airplanes.

The Mechanical Airplane Fuel Gauge is fitted with a cork which is attached to a lightweight aluminium pipe. The cork goes up or down with the fuel level. The pipe is attached to a stainless steal gear system which converts the motion of the cork into a circular movement showing “full” or “empty” indication of the fuel tank.

The mechanical fuel gauge is a simple device found in the old aircraft models. The disadvantage of mechanical fuel gauges is that there are too many moving parts that can get stuck or jam up due to the aircraft’s movement and vibration.

Electrical Airplane Fuel Gauge is also known as capacitance meter and uses a capacitor, an electrical amplifier and a fuel gauge to give a reading of Aircraft Fuel Flow Indicator in the tanks. The capacitor stores an electric charge, the size of the dielectric which is either the fuel in the tank when full or the air in the tank when it’s empty. The fuel gauge in the cockpit of the aircraft reads the capacitance charge and displays the information.

The Digital Airplane Fuel Gauge is the latest technology being used to calculate the level of fuel in the airplane’s tanks. When the aircraft is fuelled up for a flight, the pilot enters the quantity in each tank via a touch screen on the Digital Fuel Gauges. The flow rate of the aviation fuel through the outlet pipe is accurately measured and the onboard computer in the plane’s electronic management system calculates the quantity of fuel remaining in each of the tanks and displays it in digital form or bar graphs. Based on the consumption of fuel and the quantity left in the tanks, the aircraft’s electronic management system can calculate whether the plane has sufficient fuel to reach its destination.


Features and Specifications of EDM 830

Engine Data Management 830 SystemAircraft Engine Data Monitoring (EDM) 830 is the latest in the series of EDM’s manufactured by World leader in aircraft cockpit display systems and technologies. The Engine Data Management 830 system is perhaps the most advanced and accurate data acquisition and display system for piston engine machines on the market. Read on to know the features and specifications of the EDM 830 Aircraft Engine Data Monitoring System by J.P. Instruments.

With a TSO quality certification, the J.P. Instrument’s EDM 830 is a flight engineer, an aircraft maintenance manager and a flight data backup instrument all rolled into one single sleek and versatile unit. For the price that J.P. Instruments is asking for the EDM 830, there really is nothing that is even remotely close with matching features and specifications.

From the moment you take off and until you switch off the engines, the Aircraft Engine Data Monitoring (EDM) 830 is always there – working diligently and constantly monitoring your aircraft engine so you as the pilot can concentrate on just flying the plane. The EDM 830 monitors your engine parameters no less than 180 times a minute and will warn you instantly if any parameter exceeds the pre-programmed limit. And mind you as the pilot, you are free to programme the limits as you see fit.

Features and Specifications of the JPI 830 Aircraft Engine Data Monitoring System:

1. Four-inch diagonal LCD screen with multiple mounting orientations.

2. JPI is designed the EDM series to mount in a standard 3 and 1/8-inch hole but with the ability for the end-user to display the screen in any one of four different layouts

3. Easy upgrade – EDM 830 is designed to make it easy to upgrade from the older 700 and 800 series – simply unplug the older 700-800 series and plug in the new EDM 830!

4. No change of probes when upgrading from previous 700-800 series EDM.

5. Ability to add additional engine monitoring features at any time. The new EDM is your basic EDT and CHT monitor and comes in four six and even up to nine-cylinder packages.

6. You can now add additional engine monitoring features such as RPM oil temp or outside air temp could be added at any time.

7. The em1 11 EGT clamp type probe and the 5050T CHT threaded bayonet type probe are included in the box and allow the pilot to see EGT on the left scale in blue and CHT on the right scale in white.

8. EGT and CHT colours will change to a yellow or red if temperatures begin to exceed pre-set conditions.

9. You can now swap your single factory CHT probe for the new m113 18-millimetre spark plug gasket probe at no extra charge.

10. The all new Aircraft Engine Data Monitoring series 830 will also provide you fuel used time and fuel remaining gallons per hour as well as GPS destination when connected to a GPS source and can be displayed in gallons.

11. The outside air temperature can be displayed both in Fahrenheit and Celsius with fuel flow rpm map and OAT the EDM can calculate percent horsepower as well temperature and oil pressure are shown in a bar graph format both units are simple to use and will automatically cycle or you can press the white step button to manually cycle each engine.

12. A black lean pine button is included that will allow you to select and obtain lean or rich of peak.

13. There is also a Keyspan USB port for updates and to obtain engine analysis data.

For more information, please visit the JPI website page here:

How Aircraft Fuel Flow Indicators Work?

Aircraft Fuel Flow IndicatorsAircraft’s have two wings and a fuel tank in each of them. Some aircraft are adopted for long duration flights and may have more than two fuel tanks. Having one fuel flow indicator for one tank is easy to understand but ever wonder how a single fuel flow indicator can provide information regarding fuel levels in two or more tanks? Read on.

In days gone by, an aircraft fuel flow indicator was basically an adaption of the vehicle fuel flow indicator. It had an analog system (i.e. mechanical) via a micro float valve and a tiny bucket wheel. As the fuel flowed, the bucket wheel rotated inside the fuel pipe and provided a reasonably accurate fuel flow rate. Meanwhile the float valve gave an actual indication of who much fuel was left in the tanks. The fuel balance indicator and fuel flow indicator looked a little more complex than your average car fuel indicator but the essential functionality was the same.

The float valve position and the rotation rate of the bucket wheel was converted to an analog indication via a drive magnet. As you can imagine, this was a very delicate arrangement.

Some 20 years ago, the humble fuel indicator and fuel flow indicators were upgraded to electrically powered indicator. This brought in a level of accuracy to the fuel indicator and fuel flow indicators. The system no longer relied on metal wires or cables connecting the float valve or bucket wheel to the actual fuel indicator and fuel flow indicators. These metal cables were prone to get tangled and during a turbulent flight, were known to get tangled making them highly unreliable. Which is why in WWII war movies, you often saw pilots tapping at the fuel flow indicator to make sure nothing were stuck.

The electrical system did away with the cables and instead worked by calculating the capacitance. Basically, the electrical fuel indicator and fuel flow indicators used a capacitor to do the calculation. Here’s how it worked – the capacitor stored an electric charge. How much of this electric charge it stored depended on the level of the fuel in the aircraft.

More the fuel, higher the stored charge – very simple when you think about it. In turn, the capacitance charge level is converted by the fuel gauge into an analog or digital read-out.

Roughly 10 years back, the electrical fuel indicator and Fuel Flow Indicators were swapped out for a new innovation – the digital fuel indicator and fuel flow indicators. Here’s how the digital fuel indicator and fuel flow indicators worked:

When aviation fuel flowed through a pipe, it could be accurately measured via the Aircraft Electronic Data Management Systems (EDMS). The output could either be displayed as a bar graph or as a number (depending on the pilot preference). Modern EDMS not only indicated fuel levels and fuel flow levels with a high degree of accuracy, they could provide other valuable information too such as, distance-to-empty and with a GPS plugged in, they could even indicate whether the plane had enough fuel to make it to a specific destination.

In the United States, J.P. Instruments are the premier manufacturers of modern day fuel indicator and fuel flow indicators. More information here: Error margin would indicate a fuel leak and trigger an alarm.

How Aircraft Monitoring Systems Works?

Aircraft Monitoring SystemsAircrafts are held up to extremely high standards simply because of what it was made to do. It is responsible for so much and has the immense capacity to carry what it needs to carry across the country and overseas etc. Aircraft engines are the most expensive part of an aircraft and can cost as much as millions of dollars. Therefore it is critical to continuously monitor via many different types of sensors it in order to avoid extremely expensive repairs.

Monitoring systems collects data and transmits it for review and if action is necessary it will be carried out. Repairs take time due to the engine being taken for long flights. This would require a replacement engine being brought in which is also an expensive process.

J.P.Instruments has been around since 1986 and has provided excellent quality monitoring systems. The CEO who is also the founder was a mechanical engineer working with aircraft and also pursued work as a test engineer. He created his first scanner system for his own aircraft. The website for this company’s products is filled with useful information, customer reviews, a large selection of products and much more. They have expanded from just monitoring systems and now have another line of reliable and cost-effective aircraft parts. They have engine data management systems, Fuel Gauges, and GPS moving maps.

The website provides video tutorials for many of their products as a part of their technical support as well as a knowledge base, guides and software downloads. Each product has a detailed overview as well as customer reviews to help give additional insight. You really can understand what you’re looking at when it comes to a product even if you had no knowledge prior to viewing the site. The Aircraft Engine Monitors products are organized by categories of the systems they are a part of and as individual products making it as easily accessible as a website. That’s how informative the website is. If you feel you need to speak with someone in person, they have a link to finding a nearby dealer to go to.

For those buying your own personal aircraft, know that you are in good hands with J.P Instruments. They will guide you through it all in the buying process and has the credibility for the excellent quality of products. The best companies reassure customers in multiple forms whether its support, technical FAQ database, videos or tutorials and constant customer support. That is just one part while the other is simply providing great products which are the reason for confidence in showing customer reviews. It all shows the dedication of the company to excellence and the satisfaction of their buyers; pilots and mechanics.

Get Accurate Information & Save Panel Space in Aircraft with Slim Line Instruments

Slim Line InstrumentsAlmost all aircraft panels are required by Federal Aviation Regulations (FAR Part 91) to have room for a few obligatory instruments. The complete list of the instruments necessary for legal flight is quite extensive so saving space is a priority. JP Instruments always sets the bar for high-quality products for a great price.

Slimline is the best brand that one can have on their aircraft. It has so many advantages that one would need to travel safely without the added weight of large mechanism inside the plane. They have a whole line of aircraft instruments called Slimline that splits the gauges into individual pieces that are easy to install. The gauges are all bright red, easy to read; they can be purchased either individually or together in groups. SlimLine supplies for Experimental and Certified, FAA-approved aircraft.

These instruments save the needed space while still giving accurate information that is up to date. The lack of instrument panel space is usually not a problem for an average two-seater aircraft with seating that is side-by-side. It is, however, a common problem with single-seaters and two seaters with tandem seating. 24 inches wide is hardly big enough to accommodate a set of radios, switches, Slim Line Instruments and other controls.

The equipment will be able to monitor the temperature, oil flow, and overall functioning of your engine. It allows for the pilot to monitor progress and functionality as they do work piloting the plane. There is no need to have to worry about changing temperatures and fuel flow. The management system is combined with quick response sensors of different kinds to display accurate engine data in real time. The displays can be easily programmed and therefore any pilot can easily program them straight from the front panel. The upper (I.e. engine temperature) and lower limits (i.e. fuel) can be monitored and should the engine exceed any of the limits, there will be visual and sometimes audio warnings sent to the pilot that is difficult to ignore.

The easy to understand navigating panels will allow one to operate not only the machine but the plane to the best extent possible. There is both the single engine and multiple engine management systems available. This variability allows for accommodation to almost any kind of Aircraft Engine Data Management. The Gauge can not only be updated two times per second but is also accurate in terms of +/- 1 RPM. It has an “over boost” alarm, which will help a person wake up in the morning or act as a reminder for the most important daily tasks. The resolution is impressive at 0.1 inches of Hg.

Aircraft Engine Analyzer – Best Engine Monitors To Keep Your Engine Healthy, Efficient & Safe

Aircraft Engine AnalyzerIt’s uncommon for an aircraft engine to simply just stop working; there’s a reason or there’s a chain of events that cause a mechanical breakdown. There are certain components of the engine that fails and cause power loss. The most common ones are the crankshaft, main bearings, pistons, cylinders, magnetos and the connecting rods.

Usually, the bottom portion of the engine is pretty sturdy and solid to withstand a lot. The top part of the engine which includes the pistons, cylinders, valves, gears, etc. is a lot less sturdy. This is where the engine analyzer comes in handy. It does its part in catching problems with these more at risk components early on to save the engine from a bigger and more expensive destruction. An engine having a fix up as many times possible is common and many of the components aren’t replaced. This means they have to tolerate many TBOs (time between overhauls). If these components happen to fail, they usually do so early on in their life from either being defective or overheating.

The best type of analyzers are the ones that do long-term performance logging and allows data to be downloaded. Technicians can then create reports from this raw data. These reports are useful to look at and provide a visual of the engine’s condition. They also can show an in-depth look if something goes wrong or an accident happens.

The best kind of Aircraft Engine Analyzer is the one that displays cylinder head temperature (CHT) and exhaust gas temperature (EGT) on all present cylinders. Unlike the cheap model that will only read and display data on one cylinder which is usually the one that is closest to the firewall and becomes the hottest. When it comes to the ideal brand of engine analyzers, JP Instruments is the industry standard. Based in California, this company is a pioneer in the digital engine technology and equipment market.

The company has a large selection of single- and multi-engine analyzer. Their most advanced monitor is called the EDM-930 which is endorsed as the main flight gadget to use. With this device on board, you will be able to remove the old engine gauges and create more space in your panel. It does countless tasks such as tracking, recording and storing all engine data. This component also includes an interface to popular GPS models, alarms that can be programmed in multiple ways, Hobbs meter, fuel totalizers and a plenty of other important features. With this device, there will be no short sidedness in identifying the problem or taking the shortcut route in data collection.

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Importance of an Aircraft Sensor System in Airplane

Aircraft Sensor SystemsAircraft sensors are essential to get data from the outside world. In this type of airplane, it is common to find the sensors dedicated to ice detection or the calculation of the position with respect to a point of origin. Also, they have sensors of altitude, pressure, speed, the angle of attack, etc. if the sensors fail or break down, the planes become disoriented.


The aircraft uses hundreds of kilometers of sensors throughout its structure and for different types of systems and components. This allows the crew, and maintenance personnel to detect even the slightest flaw that a condition or flight arrangement can pose and allows pilots to make decisions well in advance depending on the type of system or component that is close to a failed or has already failed.

The possibility of having real-time information of all the important components and systems of an aircraft generally allows crews to reconfigure their aircraft or to prepare them for a special, abnormal or emergency procedure with accurate information on the failure and about the implications that it has on the operation of its airplane, and insufficient time to allow a safer maneuver.

For example, an oil leak in an engine could be detected in time by the crew and allow them to take the necessary actions to avoid a major problem, such as overheating or fire in flight.

Sensor operation system

When the aerial platform is an aircraft, the real aperture radar SLAR (Side Looking Airborne Radar) is used and consists of a pulse of electric energy emitted in the frequency range of the microwaves and whose reflection in the ground is collected again by an antenna located on the plane itself. The main drawback is its low spatial resolution.

One or more sensors are located facing the relative air. The probe detects the Aircraft Flow Sensors in relation to the differential pressure. The vane acts as a supporting surface and aligns with the relative airflow.

Most systems are equipped with additional devices such as electric vibration systems on the flight controls to warn of the imminent loss of the aircraft. In addition to the corresponding sound and light alarms.

Commercial aircraft have three sensors, two on the right side and one on the left side, shaped like a weather vane.

Over the years the Aircraft Sensors have been evolving and will continue to evolve, are a great help and a key element. These sensors are very important and essential nowadays, they are a great element that can help pilots to avoid any problem, be more aware if there is a complication and try to solve any complication keeping most of the safety for their whole crew and passengers as well.