Fuel Planning

ByAndrew Robinson

A few years ago I took off out of Chicago’s Dupage airport (KDPA) in a Bonanza headed for Deck Airport (9D4), a small uncontrolled airport about 60nm to the west of Philadelphia. It was late November and, unfortunately, due to some unexpected ice, I found myself flying a significant portion of the flight at 4-5,000 feet instead of the 11,000’ at which I had originally planned. This was an issue because I was burning significantly more fuel at 4,000’ than I would have at 11,000’. I did my fuel planning math and came to the conclusion that I would still make it to 9D4 with the required minimums. On I flew, watching the number on the totalizer decrease.

I arrived at 9D4 after dark. Although I didn’t think I would need one, I ended up having to fly an approach to get down below the cloud deck. My troubles weren’t over. After breaking out of the clouds, I was terrified to realize that the runway lights weren’t working.

Now, I had a problem. I was in a relatively unfamiliar area in marginal VFR at night and I was quickly running out of options as far as my fuel was concerned. Fortunately for me, 9D4 is located 14nm north of Lancaster Airport (KLNS), which is a towered airport with very nice approaches and facilities. Also working in my favor was the fact that Lancaster was reporting VFR. I headed as quickly as I could for Lancaster and landed uneventfully.

When I landed I had the required fuel minimums on the airplane, but I managed to scare myself pretty thoroughly. I realized that while I had been forced to deal with some unexpected complications: icing forcing me down several hours before my planned descent and inoperative runway lights that were not listed in the airport NOTAMs. I was very blessed that Lancaster was so close by and that I was able to land without having make an approach. Had LNS not been VFR, I could have easily burned through another 15 minutes of fuel maneuvering for and executing an approach. If, for some reason I’d had to go missed or perform a hold, I would have gone through my remaining fuel pretty quickly. To me, this is a classic example of “just because it’s legal, doesn’t mean it’s safe.” I realized I needed to change how I did my fuel planning.

Since then, I have enforced a personal minimum: 18 gallons must be on the Bonanza at the time I reach my destination. If things change un-expectedly enroute and I realize I won’t make it to my airport with at least 18 gallons, I stop. I had always tried to have an hour of fuel on board as a reserve, but having a hard number is an easy way for me to make decisions.

Having a fuel totalizer installed in an airplane is a really nice way to upgrade the panel and give the pilot a clearer idea of how much gas is being burned/ how much is remaining. The totalizer installed in our Bonanza is a JPI Fuel Flow 450. It has a lot of nice features which make fuel management chores much easier. If a totalizer is something that you are considering installing in your aircraft, or if you have one already, here are a few things that I’ve learned from my experience flying with them.

 

  • While helpful, don’t rely too heavily on the totalizer to do your fuel math for you. Similar to the negative effect that using GPS navigation can have on a pilot’s ability to navigate via a chart, over dependence on digital fuel systems can lead to problems. A fuel totalizer should be telling you what you already know, not doing all your math for you. Do your fuel math and confirm it with the totalizer. If it failed, you should still know how much you have and how much is needed.
  • Likewise, don’t rely completely on the accuracy of a totalizer. Technology isn’t perfect, and if the instrument isn’t quite calibrated correctly, the numbers could be wrong. Fuel information is absolutely critical, and thus warrants constant monitoring and double checking. When you do arrive at your destination, keep track of how much fuel the airplane takes and compare it to the numbers on the totalizer to verify its accuracy.
  • Unless you are flying an airplane which has a “both” setting, you will still need to be keeping track of how much fuel is available in the aircraft’s individual tanks. For example: our Bonanza has two tanks, but the totalizer doesn’t keep track of that information. If I don’t remember to switch tanks, I can run one completely dry and the digital read out will indicate the remaining gas in the other tank. The totalizer won’t indicate anything about the individual tank quantity until the engine quits and the flow drops to zero.

 

Pictured below on the left is a fuel selector from a Piper Aerostar. The airplane has two selector valves and three fuel tanks. While the system is not difficult to use, it does require proper understanding and regular monitoring to ensure that the fuel is distributed correctly. The picture on the right is the selector out of an A36 Bonanza. I love the simplicity of the Bonanza’s fuel system, but it still takes attention and intention on the part of the pilot to keep track of how much gas is available on either side.

 

  • The JPI unit that we have installed on our airplane even has an “hours and minutes remaining” screen as well as a “fuel required” screen. The totalizer actually talks to the GPS and is able to tell me how much gas I will need to get to my destination. Just remember that those numbers are computed only at the current flow and do not take into account the potential increases/ decreases in consumption which will occur as power settings are changed for descent and arrival into the airport. I may feel pretty good about my hours and minutes remaining when I’m sitting at 12,000 feet, but when center makes me descend to 5,000’ and I’m still an hour away from my destination, endurance will decrease. It also can’t take into account any additional flight time that may be required to shoot approaches, hold, or divert.
  • Have you ever heard of “G.I.G.O?” It stands for “Garbage In, Garbage Out.” What it means is that the information which the fuel totalizer is giving the pilot is only as good as the information that the pilot gave it at the beginning of the flight. The totalizer in our Bonanza does not have any method of checking the quantity in the fuel tanks. At start up the pilot inputs the amount of fuel on board the airplane and the totalizer keeps track of how much is burned which is then subtracted from that inputted number. Ergo, if the amount of fuel is not updated or is incorrect, the fuel total numbers displayed will be inaccurate. If a pilot told the computer that the tanks had been topped off, but didn’t verify it, the fuel could be exhausted and the totalizer would still indicate that there was fuel available. It is, therefore, VERY IMPORTANT to confirm the airplane is fueled to the amount desired (visually if possible) and use the fuel gauges in the airplane to verify the accuracy of the totalizer.
  • Use a timer: I like to use the timer on my phone to remind me when it is time to switch the fuel tanks. If I set the phone to vibrate and put it in my pocket, it will remind me to change tanks at the desired time if I haven’t remembered to otherwise. It’s also nice because I can write down exactly at what time (or quantity) I changed tanks so I can keep very accurate track of how much fuel I have in any given tank. This is especially helpful in airplanes that have more than two fuel tanks. Another option is setting the timer on a Garmin 430, 530, or G1000 to give an alert or message reminding the pilot to change tanks at a preset time.

 

It shouldn’t come as news to anyone that the importance of fuel planning cannot be overstated. I personally know multiple people who have run airplanes out of fuel because their planning wasn’t quite right or the weather changed and they were unwilling to take the time to stop. In the case of my Bonanza story earlier in this article, it was obvious to me before I even landed that I should have picked a fuel stop when it became apparent that I would arrive at my destination with less than my desired one hour margin.

The technology that we have now to help us keep track of our fuel usage is wonderful, but use it as an aid; not as your only source of fuel calculation. Remember to verify the amount of fuel on the airplane before you go because the number on the totalizer won’t mean anything if it doesn’t match the amount in the tanks! Above all, don’t be afraid to stop and get fuel when you need it. I’d rather have to tell the passengers that we need to stop for gas than deal with the potential consequences of running out.

Andrew Robinson is a 135 Charter Pilot and flight instructor who lives with his wife and 2 daughters in Pennsylvania.  He flies Pilatus PC-12s and instructs in Beechcraft Bonanzas.

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  • AOPA’s Emergency In Person Seminar

    ByHank Gibson

    Courtesy AOPA.org

    We spend time training for them, but real-world emergencies are rare enough that it’s easy to get complacent. They don’t always happen to “other pilots,” though, and preparation can make a big difference when things don’t go as planned:
    • What if you lose 500 rpm during takeoff, but the engine is running smoothly?
    • What if the ammeter drops to zero during a flight in IMC?
    • What if your left aileron develops a strong vibration in flight?
    Our new seminar is full of expert tips on handling those “up here, but wishing you were down there” scenarios. We focus on how to keep abnormal situations from becoming full-blown emergencies, offer advice on keeping critical problems under control, and give our best advice on off-airport landings.

    Find an AOPA Emergency Seminar near you!

    • Monday January 11, 2016-The Woodlands Waterway, 7pm-9pm
      • 1601 Lake Robbins Drive, The Woodlands, TX 77380
    • Tuesday January 12, 2016-Wyndham Houston West, 7pm-9pm
      • 14703 Park Row Blvd., Houston, TX 77079
    • Wednesday January 13, 2016, Holiday Inn San Antonio Airport, 7pm-9pm
      • 77 NE Loop 410, San Antonio, TX 78216
    • Thursday January 14, 2016, Omni Austin Hotel at Southwark, 7pm-9pm
      • 4140 Governor’s Row, Austin, TX 78744

  • The PIC Isn’t Always the Pilot Who Took Off

    ByAnne Pargeter

    You are at cruising altitude and your flight is going just as planned. All of that can change, sometimes without much warning, and you, the non-pilot, are now in charge. Would you know what to do?

    This was a scary thought for me until I attended a seminar developed for the non-flyer at a Cirrus Owners Pilot Association (COPA) fly-in. Cirrus is the only small plane with a parachute as standard, so I thought all I had to do in an emergency was pull the chute. It’s a little more complicated than that!
    I learned the vast majority of pilot incapacitation happens when the plane is at cruising altitude, so there is time to find a solution.

    anne-pargeter-picture

    I was taught ten basic steps to follow to bring the plane safely to the ground.

    • First attempt to revive the pilot. If he is choking, it is possible to do a Heimlich maneuver from the side. This may dislodge whatever is blocking his airway and solve the problem. If he is experiencing hypoxia, turn off the heat, open all vents, and, if you have on board oxygen, use it. Also, if you can, get instructions on how to descend to a lower altitude. If the pilot is unconscious due to a heart attack or other medical emergency, there are still things you can do from the right seat.
    • Engage the autopilot if it isn’t already on and move the pilot off the controls. *
    • Ensure you are connected to the radio. If you hear ATC or other pilots, you are.
    • Send an electronic trouble message. Set the transponder to 7-7-0-0 to identify your plane to ATC. This will cause your plane to be highlighted on ATC radar screens.
    • ATC will most likely contact you asking what is your emergency. If this does not happen, you will need to transmit a Mayday call. All non-pilot passengers should know how to use the radio to get help, if they know nothing else.
    • With help from ATC, decide where you want to go.
    • Use the autopilot to fly in the direction suggested by ATC. I was taught that ultimately the choice of where to deploy the parachute is up to me because I am now the PIC, pilot in command.
    • Ensure that seat belts are secure and the emergency hammer is between your legs (so you have it to break a window to escape if needed).
    • Pull the parachute handle.
    • On the way down, shut down the engine and brace for impact.
    • After landing, move away from the plane, into the wind. Stay nearby and wait for help.

    The seminar covered specific procedures to accomplish these basic steps, what to do if you don’t get a response from ATC, what to say in a Mayday transmission, how to fly a heading, how to check fuel levels, shut down the engine, etc. After the seminar, I felt much more comfortable about what to do if my pilot suddenly lost consciousness.

    I was also told to practice what I had learned to avoid panicking in an emergency situation. There are so many things the person in the right seat can do under normal circumstances to practice. Learn how to set heading bugs, learn where the plane’s Electronic Locator Transmitter (ELT) is located and how to activate it. This will help rescuers locate the airplane. Learn how to assess your fuel levels. Practice making routine radio transmissions. Observe what your pilot does and ask questions if you don’t understand something.

    Knowing what to do in an emergency situation will give you a sense of control over what will happen to you, your pilot, and any passengers on board your plane. If you have never considered taking a lesson or two for the non-pilot, find yourself an instructor, and learn what you need to know for your plane. Hopefully you will never have to use it, but if you do, you will be ready to be the PIC who lands the plane.

    Anne and her husband Stephen are the proud owners of a Cirrus SR20. They plan to put the airplane to better use once Stephen retires. Anne has a background in desktop publishing and writing.

  • Dry Motoring a PT6

    ByHank Gibson

    When it comes to turboprop engines, a hot start is a really bad thing. For you piston drivers out there thinking, “What’s the big deal, you are just starting a hot engine,” then here’s a little education for you.

    In a PT6 turboprop engine, there is a very important temperature gauge that a pilot monitors very closely during each and every start. It is called the Inter-Turbine Temperature gauge, or ITT. This temperature is a measurement of the exhaust gases between the compressor turbine and the power turbine (s). In the picture below, the probe is located where the blue and red colors meet.

    In a turboprop engine, specifically the Pratt & Whitney PT-6 in all it’s different sizes and variations, there will always be a specific temperature that the pilot will want to keep the ITT below. This article will deal specifically with a Piper Meridian.

    A Piper Meridian starts hotter than almost any other PT6 engine because of the way it’s air intake is designed. Unlike other turboprops, the Meridian has a permanently open inertial separator. This means that not all the intake air makes it to the engine during start because some of it goes out the inertial separator opening. So, coming to a Meridian from operating other turboprop engines can lead to a little bit of a surprise on the ITT temperature being higher than what a pilot is used to when starting.

    As a rule of thumb, when starting a Meridian, never let a start continue when the ITT hits 875 degrees. Based on the chart below, you are still in the safe zone at 875 and have about a 50 degree buffer before you have to start getting worried.

    On cold starts with a good battery or a GPU, 875 is typically not an issue. Most starts when cold are going to be in the high 700s or low 800s. On a cold start, if you are seeing starts in the mid to upper 800s, try starting with a GPU and see if that lowers the start temperature. If it does, then that means your battery is weak and needs to be replaced. Another tell-tale sign of a weak batter is the Ng doesn’t spool up properly (meaning it settles around 12-13%) or takes a really long time to spool up. Also, never start on the battery with less than 24 volts.

    When there are multiple flights in one day, the pilot has to take into consideration the warm engine prior to starting. If the ITT, prior to the start sequence, is above 150 degrees, it is time to do some motoring of the engine.

    What is motoring? It is simply using the starter to turn the engine, which leads to air being sucked into the engine allowing the engine to cool off prior to start. The theory is, the cooler your engine prior to start, the cooler the ITT peaks at during start.

    Here’s the steps on how to dry motor a Piper Meridian:

    • Battery on
    • Strobes on
    • Fuel Pumps and Ignition off
    • Throttle idle
    • Condition Lever feather/cutoff
    • Push the start button
    • Monitor the ITT temperature
    • Reaching 150 degrees, if less than 30 seconds have elapsed:
      • Fuel Pumps on
      • Ignition On
      • Condition Lever run
    • Reaching 150 degrees, if 30 seconds have elapsed:
      • Push Manual/Stop button to stop the start
      • Let starter rest for 30 seconds

    The starter has a 30 second limit on the Meridian, followed by a 30 second rest period. You can do the sequence twice, then, after the 3rd start, there is a 30 minute rest period. Typically, if the ITT won’t cool down to 150 after the 3rd time, there is probably something wrong.

    The most important thing a pilot can remember is never, ever push the condition lever forward if the ITT is above 150 degrees. You’ll be well on your way to avoiding hot starts that way.

  • A Sad Reminder

    ByAndrew Robinson

    It was a rainy Thursday afternoon and I was eating lunch with my family when my phone rang. My wife and I had just been discussing how miserable the weather was, so it was only natural that about 30 minutes later I was soaking wet and sitting in one of our Aerostars getting ready to take off for Ohio. I didn’t have much information about who I would be flying, or why, but I knew that I was going to pick someone up to fly them home; something about a missing airplane. So off I went into the muck. My biggest concern at that point being whether or not my clothes would ever dry out.

    I arrived uneventfully and walked happily into the FBO, but found myself quickly in a very different atmosphere. It turned out I had two passengers to pick up, a husband and wife, and they had arrived at the FBO before me. As I walked in the door, the wife received a phone call. The person on the phone told her that search teams had found her father’s airplane crashed in the woods and that he was dead. I learned the rest of the details quickly and it was hard to stomach.

    She was travelling home that day to be with family until they were able to locate her father. She was pregnant with her first baby and was in her third trimester. The baby was to be her dad’s first grandchild. He’d owned a Lake Amphibian for years and had stayed at home to work while his wife was out of town. He was last seen leaving work on Tuesday of that week and was reported missing on Thursday by his co-workers. Airport security footage showed him pulling the airplane out and taking off at 20:48 (after sunset) on Tuesday night.

    After a few minutes we loaded the Aerostar and took off. It was the saddest flight I’ve ever done. Understandably, my passanger sobbed on and off from the time she got off the phone until we landed a couple of hours later. The weather seemed appropriate as we flew along through the rain and were greeted at our destination by a grief stricken family and a few reporters.

    I said a sad goodbye and left, but I couldn’t help but think about their situation. It really hit close to home with me as it was easy to draw parallels between my family and theirs: she was very close in age to me and pregnant with her first child. My wife and I were new parents. Her dad had owned his airplane for about the same length of time that my dad has owned his Bonanza. Additionally, it isn’t uncommon for my parents to go a couple days without being able to reach each other because they both travel.

    A Lake 250, the same type of aircraft involved in the accident.

    But what happened..?

    In the time since the accident, the NTSB has published their findings and unfortunately, it makes the situation sadder. It was completely avoidable.

    Airport security cameras showed that after removing the airplane from the hangar, the pilot did not complete a preflight inspection or even a walkaround of any kind. He simply climbed in and left. The investigators were unable to find any traces or odor of fuel in the wreckage, nor any mechanical abnormalities with the airplane. In fact, according to the report, the engine was put on a test stand and ran perfectly. It would seem that the pilot simply never checked the fuel quantity and took off. The airport cameras captured the take off and a bright flash about 30 seconds after the aircraft departed.

    Here is an excerpt from the report:

    The National Transportation Safety Board determines the probable cause(s) of this accident as follows:  The pilot’s attempted 180-degree return to the runway immediately after takeoff in dark night conditions, which resulted in collision with trees and terrain. Also causal was the pilot’s inadequate preflight inspection, which resulted in a takeoff with little-to-no fuel on board the airplane.

    Interestingly, the report also details their ability to use logbook information and fuel receipts to show the airplane was taken on a long cross country on its last flight and likely not fueled again.
    Another thing which stuck out in my mind upon learning the details of the crash was how important it is to let someone know when you’re going flying. Having another person know roughly when a flight is leaving, where it’s going and and when to expect it back could potentially save the lives of the people on board. In the case of this accident, the pilot didn’t alert anyone that he was going flying and therefore, no one realized he was missing for 2 days.

    From reading the NTSB report I don’t get the impression that he survived the crash, but I can’t help thinking about the possibility that he, or others in similar circumstances, could survive a crash and then die from their injuries because no one knew to look for them. When I flew charter, we weren’t legally allowed to take off VFR without letting someone at the company know the details of the flight. I’ve adopted this as my personal policy as well. One text message could be the difference between being rescued or not.

    Finally, every pilot should ensure that a proper walk around is completed! It’s easy to assume everything is okay with an airplane, especially one that no one else has access too. In addition to a thorough preflight, I like to walk all the way around the airplane and visual check fuel caps, doors, chocks, ropes, etc., immediately before getting in to ensure that everything is ready. I know a couple of pilots who have taken off with various panels and compartments open simply because they got distracted during their walk around and never closed them. (A good policy is to never walk away and leave something open). Perhaps even more mind boggling is that he apparently didn’t look at the fuel gauges after start up and before take off. I also have to wonder how much fuel he had remaining upon completion of the previous flight.

    “Aviation in itself is not inherently dangerous. But to an even greater degree than the sea, it is terribly unforgiving of any carelessness, incapacity or neglect” is likely a familiar quote to just about every pilot. It is often written on a poster with a picture of an old timey bi-plane hanging out of a tree, but I think that it is absolutely on point. Carelessness in the preflight and neglecting basic pilot responsibilities (in this case fuel planning) cost this father his life and his opportunity to meet his first grandchild.

    I know this article is a real downer, but it’s supposed to be. Its tragic that accidents take place which are completely avoidable. Obviously this case was beyond the normal realm of carelessness and neglect, but, we as pilots need to be extremely careful not to get so comfortable with an airplane that we stop doing the things which are so basic and important to safety. One of my professors in school used to say “aviation is fun, but it plays for keeps,” which is an effective way to remind myself how important it is to do it right.

    *Out of respect to the family, I have not included any specific names, tail numbers or airports in this article.

  • The Piper Saratoga Turbo

    ByHank Gibson

    Piper SaratogaRecently, I assisted with the delivery of a 2007 Piper Saratoga Turbo from San Antonio to New York City.  It was a very nicely equipped airplane, complete with a Garmin G1000 panel, an STEC 55x autopilot, and air conditioning.  The owner joined me on the flight back to get trained in the airplane, getting him comfortable in it over our 2 day excursion back to NYC.  Total flight time was 12 hours, though that did include several stops along the way and landing practice at the airports we stopped at.

    The 6 seat Turbo Saratoga is a very comfortable, very capable flying machine.  It is made for hauling, with a gross weight of 3,600 pounds, but that’s not to say it isn’t lacking in comfort, either.  The rear cabin has 4 seats, 2 facing forward and 2 facing rear.  It would be a little tight for 4 full size adults in the back seat.  To avoid knee knocking, the plane is an excellent 4 person and bags aircraft (or 4 adults and 2 kids).

    The really nice part about the Piper Saratoga is the baggage door.  Unlike the Bonanza, the Piper Saratoga has a baggage door that opens to the baggage compartment, creating a much easier way to load and unload baggage.  The nose baggage compartment, which holds an additional 100 pounds, is a very nice feature, allowing the bag load to be spread out.

    Piper Saratoga Inside

    We typically saw cruise speeds of 155-165 KTAS depending on altitude.  The highest we went was only about 9,000 feet, so we didn’t get up real high to see what the single turbo could do.  Even though the Lycoming TIO-540 engine burns about 20 gallons an hour, with 102 gallons of gas on board, the fuel consistently outlasted our desire to continue flying.

    Being equipped with the G1000 was a very nice feature of this particular Piper Saratoga.  The screens are nice and big, larger than the displays on a high wing Cessna or a Corvalis.  That allows for easier viewing of approach plates, NEXRAD, and the engine gauges.

    There are always downsides to an airplane, and the Saratoga is no exception.  The STEC Autopilot leaves some to be desired as I felt it hampered the capability of the G1000 when shooting approaches because the 12 knot crosswind limitation on the autopilot. You can still use the autopilot on an approach with higher than 12 knot crosswinds, but the autopilot tends to search around for the final approach course.

    The air conditioning works very nicely, though it did have a tendency to freeze up at altitude.  We discovered that quickly and just decided to turn it off and leave the blower on, since it was cool enough up high anyway.

    Overall, the Turbo Saratoga is a very nice airplane.  The speed leaves a little to be desired (you can get 10 KTAS more out of a Bonanza with a Continental engine, about 20 knots more if it is a Turbo Bonanza), but it is very high on comfort.  The Piper Saratoga makes for a good family airplane or as a hauler.  I liked the airplane a lot and thoroughly enjoyed my time in it.

  • MMOPA Operating Practices for the Piper PA46

    ByHank Gibson

    I have the privilege of serving on the Malibu & M-Class Owners and Pilot’s Association Safety Committee.  Along with 6 other Piper PA46 instructors, we were tasked with two things last year leading up to the MMOPA Convention in Colorado Springs last October.  The first was to develop a Master Aviator Program (more on that in a later article).  The second was to develop Operating Practices for the Piper PA46 fleet that we as instructors could all get on board with to teach the same thing, allowing everyone in the fleet to fly approaches and patterns the same way.

    When I started instructing in the piston Piper PA46 line (the Malibu, Mirage, and Matrix), I was surprised to find that there were no recommendations anywhere that I could find for approach and pattern power settings and airspeeds.  This led to some experimentation on my part trying to find out what works well for the airplane.  I had originally been given good training in a Malibu, but hadn’t flown one for several years, so my numbers were a bit rusty.

    I have been in the Cirrus world for a very long time.  One thing I greatly appreciated from an instructing point of view about Cirrus was the abundance of guidance the factory gives instructors and pilots on how the airplane is supposed to be flown.  All CSIPs and all Cirrus pilots should (theoretically) be teaching and flying the exact same way.

    I was quite surprised that Piper didn’t put out similar information.  I wasn’t as familiar with MMOPA at the time, but was surprised they didn’t have any information either.

    I apparently wasn’t the only one with a desire to have a little bit more standardization.

    So, without further ado, here are the MMOPA Operating Practices that the Safety Committee put together.  If you are a new Piper PA46 pilot, these numbers are what you will expect to use when you do your Initial training.  If you are a seasoned Piper PA46 pilot, you probably fly these numbers, or pretty close to them already.

    These are tried and true power settings and speeds for the approach phase and landing phase.  They work. That was the goal of the Safety Committee:  put down in writing something repeatable to enhance safety.  I believe we have accomplished that.

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