A New Day has Dawned in Aviation

General Aviation News Photo

“Getting this STC done has created the roadmap for us to continue on,” said Pelton, noting that other STCs may involve fuel systems, autopilots and more."  General Aviation News 

We have made great strides in replacing legacy fuel quantity indication in GA aircraft and Jack Pelton's comment above, indicates the importance of improved fuel quantity indication in the roadmap to improving the equipment on legacy GA Aircraft.    

Today's EAA STC news announcement opens up the literal Pandora's box of opportunity.

Actually our FAA TSO approval allows us to move even faster into getting universal approval for installing better fuel quantity systems in GA aircraft.  

The TSO approval insures that we have met both the new ASTM standard for Verification of Avionic Systems but also the RTCA DO-254 Design Assurance Guidance for Airborne Hardware as well as the DO-160 standard for surviving the external environmental conditions found on the wing of the aircraft 

This is a major step forward and was not anticipated after the Part 23 Rewrite NPRM.  

The new ASTM Standard makes it much easier to show compliance with organization, definition &  verification of our software.   

Utilizing a smart sensor was key to CiES obtaining the outstanding aviation fuel level sensing results.  

This quality indication is one that thousands of pilots rely on,  flying brand new Cirrus, Vulcanair, & Quest aircraft.  

Contact CiES as we are adding fuel quantity sensor configurations for thousands of single engine and twin aircraft. 

• Cessna
• Beechcraft 
• Piper
• Cirrus
• Brittan-Norman
• Fairchild 
• Technam

Aviation Fuel Level Indication - Customer Responses

Customer Responses

The cost to retrofit CiES senders to a pre-74 B55 is around $3200 (plus installation). That may seem "outrageous" but it's only about 50% more than what it costs to have the eight (2 per tank * 4 tanks) senders "overhauled" and my experience with overhauled senders is not very good. At best the OH senders will perform as good as when new for a few years which is to say they're accurate to within about +/- 5 gallons.
Properly calibrated the CiES senders appear to be within one gallon.  In a Bonanza with two 40 gallon tanks or a post 1973 Baron there are only four senders so that cost is cut in half. IIRC the last time I checked, new (1940s technology based) senders from Beech were around $1,600 each or over four times what CiES charges.

I'm having a hard time seeing anything "outrageous" with CIES pricing.

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And one additional point about CIES senders. I have absolutely no doubt if any question or issue came up, Scott would be on the phone within the hour. (More likely in minutes.) Every interaction I have had with him and interactions I have seen others have with him have been very positive. 

Phone or email he's always been very helpful.

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+1 on the CiES/ Scott Philiben Phan club. There's no better customer service than that provided by Scott. anywhere.

I'm still VERY happy with my CiES senders. You know, when something "just works", you take it for granted. I don't really give my CiES senders much thought. They're underappreciated little heros quietly doing their job. Perfectly. All the time.

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AIRCRAFT FUEL GAUGES THAT YOU CAN TRUST 

"With over 10,000 units now flying, CiES has taken over the OEM fuel level sending field.   Our combination of outstanding quality,  reliability, and accuracy has made CiES the standard and the industry leader for fuel level indication on all aviation platforms, GA, Utility, Rotorcraft for both reciprocating and turbine engine applications " 

A Universal Aircraft Fuel Sender

A UNIVERSAL FUEL SENDER

When we started manufacturing fuel level senders,  we had a specific customer in mind.   

In order to maximize our customers benefit for this technology, we made this sender nearly exclusive for that customers application. 

We received quite few inquiries for this fuel sender and most of them related to will it interface to our existing system.  

Sadly because we had tailored the sender to a particular aircraft and avionics interface,  we had to turn good business away.  

So step forward 3 years nearly to the day,  we had an opportunity to reinvent the fuel sender product and add new features:

First:   We have utilized a unique circuitry design to create a universal output:
                         - We can supply:  Resistance
                                                      Voltage
                                                      Frequency 

Second:  We can supply a  Fuel Temperature Output.  This feature is helpful for Jet A applications  where Pounds Fuel is the unit of measure.

Third:  We have supplied a pigtail to allow installation in tight spaces and flexibility in the Fuel Sender connection. 

We are trying to remove any barrier for you to have a more reliable technology for fuel level in your aircraft.

Contact Us for more information.

Parody on a Recent AOA Advertisement

USA Today "Unfit for Flight"

There has been a lot of discussion in the aviation community about this 3 Part Expose' Series in      USA Today - Most of our aviation community agree that - we should strive to make aviation safer.  Most of us on this side of the fence,  also agree that the condemnation of manufacturers in this industry was - just a little slanted.  I happen to know several of the players and the other side to many of the examples and lawsuits presented.   It is not as cut and dried as the articles suggest.

Mr Bertorelli - who I respect as an aviation journalist and pilot - made several good points in his Blog  As most people are aware - Aviation is the "most regulated business in the world".  In this industry we laugh at drug and medical device companies - because they have it easy.    In this environment how could an outside news agency find fault with our industry.    Given the economics of this particular business,  it isn't profitable to do a bad job.   Paul stated all of this in his blog very clearly:

There’s wide agreement that over regulation has had a hand in getting us into this mess, so further regulation — of manufacturers or more stringent training requirements —won’t get us out of it.   The entire community just doesn’t have the stomach for it. And neither do I, frankly.  Not to mention the utter lack of any economic engine to drive it all.

I was however struck today with one of Mr. Bertorelli's responses to this safety issue - and because an element of the rebuttal involved a segment of the aviation industry that I have become quite familiar.

At this point, we work on fuel level systems in aviation and most recently the automotive industry.

We have a unique but very narrow viewpoint.

GA Safety: All Heat, No Light

Excerpt from Paul Bertorelli's Blog 

As a refreshing change, the USA Today report almost tried to cast pilots as steely eyed but hapless victims of shoddy manufacturing and outdated aircraft designs. Were it only so. None of us have to look in the mirror to know that although out-of-the-blue mechanicals do cause accidents, preventing every one of that category wouldn’t change the accident rate much.

Even in some of the egregiously poorly prepared reports, the pilot obviously did something stupid—like flying into bad weather, overloading the airplane or, a perennial favorite, running the tanks dry because the fuel gauges aren’t accurate.  

That last item is a cultural thing in which automotive knowledge contaminates aviation thinking. It’s like that GEICO commercial; everybody knows the gauges aren’t accurate and we have means to work around this deficiency. 

Using a crash as a means of highlighting it seems somehow unsporting. Yeah, the stupid gauges should work, but no, they don’t.  So buy a totalizer or learn to use a watch.
But unless you, as the owner or pilot, take personal responsibility, your 35-year-old Cessna 172 is not going to be fitted with more accurate fuel gauges. 

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Unfortunately neither the NTSB or FAA equate "Bad Fuel Gauges" to Fuel Exhaustion,  but it is interesting that Paul does state this in his blog.  It is quite common to report to the NTSB or FAA after an accident that the fuel gauges are not accurate in your damaged aircraft.  There is no consequence to those statements.  If your flight plan did not indicate average fuel burn - look out.  

I also agree that fuel level is a cultural thing in aviation - I am not familiar with the GIECO reference Paul equates - but fuel level in automotive applications is barely adequate, the website tankonempty.com illustrates this very well.  The issue in aviation, is that for most small aircraft, the fuel level system was taken from a ground vehicle system, think automotive, tractor, truck - This system, was barely adequate for an automotive application as illustrated by the website above  - and this system really struggles with fuel quantities that are 3 times larger, and the fuel and vehicle movement that occurs in aviation.

When we talk to people outside aviation - and we state things like Paul's statement "Yeah the stupid gauges should work, but no, they don't"     - they look at first puzzled and then to a each non aviation person we have stated this quizzes us back "Don't small aircraft run out of fuel"  Yes they do. 
   The National Highway Transportation and Safety Administration - NHTSA in a recent automotive recall for bad automotive fuel fuel gauges on Chevrolet Trucks stated that the there was an obvious safety issue with having bad fuel gauges  - specifically from the recall announcement:

"If a customer runs out of fuel without any warning from the fuel gauge, it will cause the vehicle to stall and increase the risk of a crash, the company said."

In aviation, as Paul Bertorelli stated for fuel level  - "we have work arounds". 

-------------------------------------------

As I am focussed on a small aspect of the aviation safety issue - and this is seemingly the common aviation response to a significant issue. 

Because from where I am sitting -  maybe the pilot of the 35 year old Cessna 172 should at the least have the fuel gauges checked and calibrated at annual. 

If the gauges are too far gone - he should have the maintenance facility send in a Service Difficulty Report to the FAA - let the Feds know we have an issue out here in the field.   Let's quit making excuses or work arounds for equipment that should and by law be required to function correctly. 

I think we as a community should start questioning these common assertions and take off the cultural blinders.  

-------------  

I think we all want to make aviation safer - including USA Today.

Tilting @ Propellers

Illus. Chris Demerest http://chrisdemarest.net 

Today I took a call,  the pilot on the line was enthused, he really wanted to get our new technology fuel senders on his aircraft.  

Further he engaged us in a dialogue wanting to let us know how significant this product was to aviation, and to his passion, you know the type,  a typical Mooney pilot.

He told me about the AOPA statistics on fuel mismanagement and starvation, and that it wasn't good press for general aviation or general aviation safety  to have a fuel starved aircraft parked along  a busy highway.

He was adamant to tell us about the significance of redundant and confirming cockpit information.  Being able to cross-check the two independent fuel quantity indications in his cockpit, he felt, would virtually eliminate fuel starvation in general aviation aircraft.

He talked about the level of quality he saw in fuel senders used in aviation, and that he just hoped he wouldn't have to overhaul his original set for the umpteenth time, and then have them fail hours later in flight, as they had on the past two occasions.

He related to me that as a multi type rated and experienced pilot he had never flown behind a good aviation fuel gauge in his entire life.

I didn't say a word  I sat back and listened to the sentiment that put us on the path to start a company around this product and idea.

The idea that we will build a good fuel level sensor, a quality fuel level sensor,  around robust patented technology using aerospace materials and standards.   We will prove our commitment by qualifying this fuel sensor to the most ridgid FAA standards for manufacturing and design.

My dream is that pilots will get this and install or demand this technology on their aircraft.  If that happens, we will make a lasting contribution to the aviation industry.

So many times in this aviation business,  you feel like you are setting your train along the wrong track,  why are you building a company in aviation,  when successful people all around you question the market size, vitality and rational.   You question your own sanity on a daily basis.

I guess we do this,  because our passion makes us tilt toward that propeller.  some days it's nice to know we aren't the only ones.

Fuel Starvation - The Bucket List

NTSB  --   Safety Alert


The NTSB continues to take a close look at General Aviation Safety

One topic fails to be actively discussed....... Fuel Starvation/Exhaustion Incidents in General Aviation Average 2 to 3 per week and in the Top 5 of all causes.   While this is an issue for aviation safety,  it receives scant mention in the NTSB reports or in mitigation strategies.

This is not an uncommon or a glaring oversight,  most pilots, which some of the NTSB board are, will quickly point the blame at a fellow pilot for this particular accident scenario.

In this quick rush, I believe we are overlooking contributing elements in the chain of events that contribute to incidents and accidents of this type

General Aviation Safety: Climbing to the Next Level

In the NTSB Chairwoman's presentation at Oshkosh Airventure.

Aero News Network reported the following:

"Hersman said that while private flying accounts for only about half of all the flying done in the U.S., it accounts for a disproportionate number of fatal accidents, according to a study done by the NTSB. She said there are some themes that seem to crop up in many GA accident investigations that could be addressed by better pilot training and pre-flight planning. "I think that there are things that should never happen, really the easy things, and then I think there are things that are hard things, too," Hersman said. "And I think that among the things in the bucket that are easy ... fuel starvation. How many times do our investigators need to investigate an accident like that."

Press Coverage of NTSB Chairperson Barbara Hersman

I disagree with the NTSB chairpersons Barbara Hersman's response,  I believe this is one area that needs a detailed and closer look.

Fuel Starvation / Exhaustion as reported above is a common occurrence in aviation - 

The chairpersons comment in her News presentation in Oshkosh suggested that an NTSB in-depth evaluation into the causal factors of fuel starvation is not warranted by the board.

In the board GA Safety Board Meeting and the recent NTSB GA Safety Alert  - Fuel starvation was only lightly addressed there was really no mention of fuel related issues.  

I want to ask  .....  Why

Yes the unfortunate pilots that have experienced fuel starvation or exhaustion should have known how much fuel they started with, the should have checked prior to flight.  and they should have known average fuel consumption - his "maths" – Basic Pilot Skills.  Inculcated from his first training flight  

But the headline to the right says a lot about the information available to the pilot about their fuel level.

Accurate & Reliable Fuel Level in Aircraft - Is the Exception & Not the Rule. 

And in an emergency situation every pilot should know which tank has the most fuel – they need to know which tank to switch to.

Every pilot manual states that for the most engine critical procedures – Take off – Engine restart – Engine performance (spitting coughing) – switching to the fullest tank is not only required, it will save you from an incident.

If Ms. Hersman would have asked the aircraft owners in attendance at Oshkosh if they had accurate fuel level gauges – the response to that inquiry would be startling.   Accurate and reliable fuel gauges are the exception in small aircraft and not the rule.

In fact some pilots in attendance will state clearly they have accurate gauges in their aircraft as the gauge will read zero when they are out of fuel.    What they won't say is that the gauge reads zero all the time.

How can you make the determination of your available fuel or which tank had greater quantity of fuel if your gauges are erratic or of limited accuracy and why are we turning a blind eye to this in aviation.

This fundamental issue becomes very real when you read the NTSB Accident Investigation Reports that resulted from fuel starvation occurrences.   In most every cace where there was still fuel onboard the aircraft - the selector was on the dry tank -.

When almost every learning GA pilot is told not to trust the fuel level gauges – are we in aviation really surprised that fuel exhaustion occurs so often, or that a solution would fall into the "EASY" bucket. 

If technology in the form of Angle of Attack systems are indicated to help Stall Spin incidents

I am baffled why fuel level technology gets the literal  short stick.

Overnight - The world of aviation fuel level measurement changed

Just like the classic instrument six pack.

Seemingly while you weren't looking  -   The days of simple capacitive and resistive fuel senders disappeared and were relegated to history. 

 You need only to look at the parts manuals for the latest Cirrus SR20, SR22 or Cessna 172, 182 & 206 single engine aircraft.     Take a real close look and  you will see terms like AMR and TDR  (Anisotropic Magneto Resistive & Time Domain Reflectometry).  And instead of a voltage or resistance output to be checked in the maintenance manual - you will see terms like CANBUS and Digital Frequency.  

So what changed ...... well quite a lot ...... the digital age hit fuel level.

• First ---- The FAA requires there to be working fuel gauges in aircraft.  

Fuel gauges that are accurate throughout the range.   Yes the FAA really wants accurate gauges in the aircraft not just at "Empty"

• The FAA in their regulations makes that clear -

• The pilot is required by Part 91.205 to have working fuel gauges
• The definition of working is:   Provide accurate fuel level through the  tank range.

• The aircraft manufacturer is required  by Parts 23.963, 23.1305, 23.1337, 23.1555 to provide working fuel gauges.

• These regulations very clearly indicate that the installed fuel gauges must give accurate fuel level through the whole tank range.
• Note:  Some of these requirements were recently revised.

• Second ----- The rate of fuel starvation events remained unchanged.
•  2 to 3 per week in the US 

For a long time,  excuses have been made for fuel level reporting systems in General Aviation aircraft.   

General aviation fuel gauges were (insert your own adjective) bad, pilots didn't trust them and pilots did not rely on the information they provided.   Plain and Simple 

Uncharacteristically,  the FAA turned a blind eye to the fuel level regulations they provided, tacitly acknowledging in their own documents and publications, that the state of the art was not up to the task.  

Pilots sought and effectively utilized "work arounds" - pilots relied on wristwatches only and aircraft manufacturers and avionic shops installed or incorporated fuel totalizer equipment in the aircraft.  

Iphone App showing fuel level 

Contrary to popular belief totalizers are not required equipment. but they will give pilots confidence in their fuel level.   They have proven to be accurate while in flight and provide a reliable cross check of the wristwatch fuel calculations  at any time.   You will find a fuel totalizer or range graph is on virtually every piece of modern avionic equipment.

Fuel leaking from an aircraft fuel pump

The posting on the web (pictured right) of illustrates succinctly the common complacency of having accurate gauges in the cockpit.   The particular pilot shows his "trusted" iPhone App illustrating a half tank - this app standing in stark contrast to the values depicted on the aircraft fuel gauge.

So why did the FAA really want working fuel gauges in the aircraft.  

Nothing but an actual working fuel gauge .... can tell you exactly what you actually have onboard the aircraft.   

Case in point --- Fuel leaks at a pump are one of the hazards a working gauge will detect.

You would believe that somewhere in the digital age and the era of MFD avionics, the simple fuel gauge would be relegated to the trash heap.   

However 

--- No Pilot Calculation -- 

--- No Totalizer ----

--- No Stop Watch ----

--- No Range Map ----

Only a working aircraft fuel gauge will let you know what you have in your tank and modern technology can give you that information .  

Welcome to the digital age in fuel level reporting 

   

The Excitement of Initiating Change or I Double Down on Dark Horses

Imagine coming up with a new and revolutionary idea.

The challenge and the excitement.  You feel your pulse quicken

The moment you first look at the prototype and realize that you might really be on to something.

You want to share it -

You have a unique vision of the way the world should be in the future.  

You develop it and refine it and when it's ready - you bring it to market 

The world is just waiting to embrace your vision............

.....well frankly no it's not 

The reality goes something like this 

"You're selling what,  you're with who, you say its on new model aircraft.  No I haven't heard about it.   What is it again, aviation fuel gauges that work  - Say again...... how accurate really  - so why didn't the factory talk about it.......something that good you'd think.

Hold on let me put you on the speakerphone......guys listen up - this salesman on the phone here tells me he's got working aircraft fuel gauges for sale ......... Hold on - Dominic here wants to know if they are capacitive ....... yeah......... they are what........ give that to me again.   AN ISO MAGNETO DOO HICKEY - no never heard of it. Lord Kelvin really.

Boy the sales pitch just runs off your tongue doesn't it - Wait Bill in the back wants to know if it comes with a set of free steak knives -   no no send me a brochure - We'll be sure to take a look.

Functioning, Accurate Aviation Fuel Gauges 

• You now have an accurate fuel level sensor. 

• It detects how much fuel is in the tanks at any moment.

• It displays the fuel tank contents on your aircraft MFD screen but is not connected with the fuel management system on the aircraft.

• You must still enter the fuel level you observed in the tanks as you have always done on the MFD.

• The aircraft will use fuel flow data to calculate what the fuel level should be.  It will present that estimate of the fuel tank contents on the MFD.

• The level sensors give a calibrated fuel level - Not just accurate at the top and bottom accurate throughout.  These sensors also output the fuel tank contents to the MFD and then display them side by side with the calculated fuel level.

• These fuel level systems ARE SEPARATE. 

• Both indicate to you the pilot,  the amount of fuel in the tanks.  SEPARATE - But they match

• Got it?    Good. 

Aviation Fuel Level

Traditional Aircraft Fuel Sender 

Why don't my fuel gauges work?

Let us cover a few basics  

• Aviation industry has utilized level senders from other applications
• Aviation is not the largest market or the most financially rewarding for a dedicated fuel level sensing solution.

• Aircraft fuel tanks are larger than those for most other applications. 
• An aircraft carries more fuel.

• An aircraft has three degrees of motion freedom 
• The liquid fuel is free to move about.

There are other factors.

• Why not design a new system 
• Fuel Level Intellectual Property is hotly contested territory (a patent minefield) 
• A new aviation design must avoid other patents 
• The market share is small
• The perceived liability - Top 5 aircraft incident issue

• Fuel Level in Aircraft needs to be "Intrisically Safe".
• Explosion Proof 
• Limited Spark or Heat Energy in the fuel tank. 
• Non - Contact "The best solution" for Intrinsic safety is the hottest IP in Fuel Level
• Required for multi fuel and hybrid vehicles
• Required for vehicles with long term fuel storage - i.e. Boats
• Required in LNG / LPG

------------------------------------------------------------------------------------------------------------Fuel sending works in my car.

• Automotive fuel tanks are smaller
• What would be adequate for a resolving 16 gallons of fuel has difficulty with 3 times the volume.   
• If you have a boat - this is also an issue as you are well aware
• The variable resistor technology used in automotive applications doesn't scale well
• The variable resistor cards used,  allow 60 degrees of travel  - a good resistive card for aircraft or boats would require minimum. 180 degrees or more.

• Relatively stable fluid motion 
• The automotive sensor is exposed to some fluid motion but overall less. 
• Aircraft fuel can remain quite stable - however turbulence will creates concentrated fluid motion.
• This motion wears the resistive trace - so inadequate resolution of the variable resistor is now faced with increased wear.  From bad to worse.

• The basic requirements 
• Standard aircraft fuel gauges are calibrated only for the full and empty position.
• Caveat - new automotive systems are calibrated to the tank - great improvement
• Caveat - new aircraft MFD's allow tank calibration - Aerospace Logic, JPI, Garmin

• Almost daily use  
• The automotive sensor is continually washed with new solvent at every filling and fuel fills are more frequent. 
• Aircraft fuel can remain in the tank for long periods - it is designed to do so - however impurity buildup on the variable resistor are common at a fraction of usage time of the automotive application.
•  it is quite common to have your aircraft senders ultrasonically cleaned

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Propane Level Gauge

New requirements for intrinsic safety for all aviation fuel level systems 

• The general aircraft industry found that they could utilize a commercial off the shelf, patented float sending unit from the propane industry
• This met the new safety requirements and directly replace a float level legacy system.

• A Non- Contact solution - the resistance card was removed from the tank environment.
• Shock inputs from turbulent air can however de-couple the matched magnetic drive and the the gauge will take a set but in-accurate reading or drift back to the correct reading.
• Suffice to say - Propane Tanks were not meant to fly

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Aircraft Capacitive Sender Ad - 1948

Alternatives  - 

Capacitive Senders -

Conceived in the Late 1940's this aircraft fuel sending system set about to address the two most common issues presented above - fluid motion and resolution of the larger fuel quantity.   

These are the most widely used in aircraft above 12,500 lb 

Capacitive Sensor Benefits 

• Immunity from fluid motion 
• Greater resolution of the large fuel volume 
• Shapable to the fluid volume - tailored to the tank volume.

Capacitive Sensor Issues

• Difficult to Prove Intrinsic Safety
• The definition of the sensor is to utilize two metallic or conductive elements in the tank 
• The intrinsic safety requirement must be met with increasing the complexity of the system.
• It is a spark in the capacitive sensor that initiated the explosion in TWA 800 fuel tank. 

• Moisture Rejection
• An aircraft fuel tank breathes on ascending and descending - moisture in the air is constantly brought in contact with the fuel.  Sealing the tank is not an option.
• As the capacitive utilizes the fuel contents as an integral element of the level reading - this variable is very difficult to manage.

• What's in the tank - matters a great deal 
• Fuel must be:
• uniform 
• moisture-free
• stable and uniform temperature
• contaminant free
•  to give a consistent and accurate fuel level indication 

When you review the system above - the capacitive sender solved several issues with fuel level indication, however it brought a few of it's own limitations along for the ride.

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Ideal Aircraft Solution Characteristics

• Non Contact - New FAA Requirement
• Intrinsically Safe - 
• The alternative is proven safe electronics in the fuel
• Immune to fuel contamination

• Unaffected by Fluid motion 
• No wear items related to fuel level reporting

• High Resolution 
• Address the larger quantity of fuel in aviation systems.

• Simplicity 
• The best aviation solutions eschew complexity where a simple system provides equivalent benefit.

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CIES Inc AMR Fuel Level 

Float Based Level Sensing - Retrofits or directly replaces most units in the field

• Non Contact 
• No - Safety Issues 
• No - Fluid Contamination
• No - No moisture or fuel quality issues

• Immune to Fluid motion
• No wear of fuel level reporting system

• Resolution 
• Digital output
• More fuel level information 
• Integrity of the level signal
• Interfaces to modern avionic solutions
• Ability to output fuel temperature - Lbs fuel. 

• Simplicity




• No complexity required
• On the platforms we have been applied - exceed it's requirements

CIES Inc AMR  A sensor that was designed for and patented with the aviation industry in mind, but suitable for all high value applications.

What Accuracy in Fuel Level Means for General Aviation

Why would I want accurate fuel gauges in my aircraft. 

Predicting and shaping the future are the providence of engineers.  

If accurate and reliable fuel level sensing for aircraft became a common reality 

What are the effects on the aircraft/pilot interface.

Warnings and Annunciation 

With cross checkable and reliable information between the Fuel Totalizer and Fuel Quantity 

• Low Fuel  
• It is already exists - 
• What if it was reliable and predictable

• Fuel Imbalance - 
• Let you know when you exceeded tank imbalance limits
• Warns you of a rapidly depleting tank - safety  

• Fuel Leakage or Venting  
• Matched information fuel totalizer and tank volume
• If rate of flow d not match - a leakage or venting warning 
• With a residual power or memory input
• Internal leaks annunciated 
• Fuel Theft 

• Errors - 
• As a reliable cross check between fuel flow and fuel tank volume 
• Provides a reliable diagnostic to errors or faulty components in each system
• Failure to follow a predictable path can be flagged as an sensor or tank system requiring maintenance. 

• Secondary Fuel Totalizer - Cross check to the fuel we can derive rate to give a simple totalizer function.

Automation 

With cross checkable and reliable information - Fuel Totalizer and Fuel Quantity we can use this information to relieve pilot workload 

Fuel  Management Computer - 

• Tank Switching -
• The aircraft system would handle switching between tanks for single engine aircraft.
• This could be overridden manually in the cockpit.

• Fuel Management. 

Allow a pilot to mange total fuel volume on the aircraft with an interconnected pump system 

• Minimizes human refueling errors 
• Cross-check quantity of fuel added and correct
• Manage the fuel added or remaining to balance tank volumes.
• Use fuselage wing tanks for weight and balance corrections or trim

Aerospace Logic - Cirrus Design Retrofit

In creating a new fuel level system for Cirrus Aircraft we kept in the back of our mind  the opportunity to provide this technology to legacy Cirrus Aircraft as well as other aviation applications.

Aerospace Logic was the obvious choice - 

We chose their 200 series unit over other 2 1/4 instruments as Aerospace Logic has created a quality and sunlight readable  display with a clear and concise level indication.

More importantly, Aerospace Logic like CIES saw accurate and reliable fuel level indication as a valuable instrument in the cockpit.  Aerospace Logic was hampered in achieving it's goals for fuel level indication by fuel level senders that were previously available to the aviation market.  CIES Level senders with our new and patented technology completely changed the fuel sender game.

You will note that a digital value of fuel is displayed below each quantity gauge.  This gives an unmatched accurate calculation of quantity in each tank.

Aerospace Logic has worked with us to incorporate appropriate warnings that a quality fuel level indication system can provide.

Note:  The upper display is indicating a fuel "Imbalance Condition"
and the flashing Amber bar is indicating you have exceeded the POH recommendations for fuel level imbalance. Switch to the flashing AMBER tank.

One of the most important characteristics of the Aerospace Logic Display is the trend graph featured on the second page.  This provides graphical information of fuel level over time.  The use of the displayed trend data makes it easier to manage fuel in a single engine aircraft.

Most importantly,  Aerospace Logic was willing to work with CIES in developing a display unit that would allow a digital interface between the display and fuel level sender.

Aerospace Logic and CiES Inc. look forward to pilot response for this system.

http://www.aerospacelogic.com

Press Release - TSO Granted - AOPA Summit

NEWS RELEASE                                    FOR IMMEDIATE RELEASE

CIES Corporation receives FAA TSO approval for new digital fuel level senders

October 10, 2012, CIES Corporation of Redmond, Oregon has received FAA TSO C55a approval for its line of digital fuel level senders. The float based fuel level senders are designed to replace the majority of the existing fuel level sending systems in general aviation aircraft. The proprietary and patented system provides a new level of accuracy, reliability, and stability to fuel level indication in the cockpit. CIES meets a TSO standard of 2% variance in tank volume, a standard normally reserved for corporate and commercial aircraft with corrected capacitive solutions. No other float based system meets this stringent TSO standard while achieving the intrinsically safe (i.e. “no wires in the tank”) requirement.

Richard Kirkness, Vice President of CIES said, "As a manufacturer of aircraft systems, we see FAA certification as critical to our success and the foundation for everything we do. FAA approval is the result of months of hard work on the part of our team here in Redmond and could not have come at a better time for CIES as the company continues to grow and strives to achieve the goal of becoming a world class supplier of advanced systems and technologies.”

Charlie Babb, General Manager of CIES added, “After the successful introduction at the beginning of this year of our senders on all new Cirrus production aircraft, we began working with other manufacturers and owners groups to provide specific fuel level sending solutions for production and legacy aircraft. The next logical step was to acquire FAA certification to validate our quality control system and lean manufacturing processes while making aircraft integration and approval significantly easier to obtain.”

The CIES fuel level senders require a dedicated digital fuel level display to ensure that the 2% accuracy achieved in the fuel tank is provided in the cockpit as well. As a result, CIES partnered with Aerospace Logic in Hamilton, Ontario to utilize their digital fuel level cockpit display. Aerospace Logic updated their fuel level gauging system to accept the digital communication link from the CIES digital senders.

CIES Corporation of Redmond, Oregon USA provides a range of high-technology products and support services to aviation, aerospace, and the broader transportation marketplaces.

For additional information on CIES and its products please visit the CIES Inc Website

For additional information on Aerospace Logic and its products please visit the Aerospace Logic Website