For years, there has been clamoring for airplanes to get rid of lead in piston engine Avgas. In the early 2000s, Thielert created a Jet A burning piston engine for Diamond Aircraft that gained some traction, but Thielert had internal issues and ended up declaring bankruptcy. Several other Jet A piston engines have come down the line since then to some success (Diamond is currently using 2 Austro manufactured Jet A piston engines on it’s DA62 and a Continental manufactured Jet piston on the new DA50).
The problem with a Jet A burning piston engine, though, is that those engines would be very expensive to put on existing airplanes, not to mention the cost of the STC alone.
Insert GAMI (General Aviation Modifications, Inc.), the famed Ada, Oklahoma company that championed turbo normalization, balanced injectors, and lean of peak operations. For those that have been to GAMI’s engine class, you know that these guys are at the very top of their game in engine knowledge.
In 2010, GAMI started the process of creating an Unleaded form of Avgas, terming it G100UL (the irony of traditional Avgas, 100LL, is the LL starts for low lead, but the lead levels in 100LL are actually quite high. UL stands for UnLeaded). Just before Osh Kosh in 2021, GAMI revealed that it’s work has come to fruition, gaining an STC for G100UL for Lycoming powered Cessna 172s.
The amazing thing about GAMI’s product is that it is able to mix with 100LL and not cause any issues. This means fuel trucks, fuel lines, fuel pumps, and aircraft fuel tanks don’t have to have any modifications to them to use G100UL. Plus, pilots will see longer engine life using G100UL because of the simple elimination of the lead. In tests, combustion chambers in cylinders burned cleaner, so theoretically, cylinders and engines will last a lot longer.
According to the company, GAMI has a few more tests to run and, assuming those go well, G100UL will be available for a whole lot more airplanes. An STC will still be required for the use of G100UL in a specific airplane, but the hope is, eventually, 100LL will be completely replaced by G100UL. The only downside is that G100UL is expected to cost about $1/gallon more than 100LL.
GAMI has partnered with Avfuel, so expect to see 100UL showing up at all Avfuel FBOs in the next year or two.
To read more, check out the press release on AOPA’s website.
You are hand-flying an in-the-weather descent, power back, heading for the FAF. You start a 30 degree banked turn at your lead point to cross the FAF, when your passenger behind you gasps. Looking over your shoulder, you see he has spilled his drink into his lap…too bad for him! However, when you turn your head back to your panel, your inner ear tumbles and you see 45 degrees of bank, 15 degrees nose low, airspeed increasing.
Congratulations! You have managed to get distracted and sucked into an unusual attitude recovery. By the book, you should roll wings level, pull to the horizon, and adjust power as necessary to keep the airspeed within limits. In this scenario, if you had not experienced vertigo, you might have been able to roll to less than 30 degrees of bank, recover your turn, pull the nose up to less than the original descent attitude, pulled a bit of power to slow back to your desired penetration speed and then resumed your desired ground track. However, this would only be appropriate if you had full situational awareness as to the deviations caused by the look over your shoulder, plus full confidence that the moderate corrective actions would put you back on your desired flight path.
As a military aviator, I learned unusual attitude recoveries based upon hard maneuvering at extreme pitch and bank angles. In the hard-maneuvering environment, an unusual attitude could be 90 degrees straight up, airspeed decreasing below 120 kts…or 80 degrees nose low, 135 degrees of bank, airspeed increasing through 500 kts… etc. In these cases, understanding angle of attack, or AOA, is critical to maintaining controlled flight and returning to a normal attitude.
In an extreme nose-high attitude, a military aviator is trained to roll the aircraft to 90 degrees of bank, ease off the back-stick pressure to reduce AOA, add power as required, and allow the nose to slice back towards level, rolling to wings level as the nose approaches the horizon. If nose low, the recovery procedure is to roll rapidly, within asymmetric g limits, until wings level, then to pull at optimum g loading to recover to level flight. For the nose-low recovery, power was normally reduced until airspeed could be assessed and brought under control. However, when doing the nose-low pullout at 7-9 gs, pulling the power for too long would leave you much to slow to resume combat.
The AOA gauge on a fighter’s glare shield is a primary reference during hard maneuvering and for landing. The AOA for optimum maneuvering is 13 degrees, displayed as the green circle or “green donut” on the gauge. The red chevron on top represents a slow condition of 15 degrees or more and the yellow lower chevron represents 11 degrees or less.
For normal landing in the F-16C, the pilot slows to 220 kts and configures abeam the touchdown point while mentally computing the final approach airspeed of 136 kts plus 4 additional knots for each 1000 lbs of fuel. When rolling off the perch and flying the final turn, the pilot would usually only glance once at the airspeed once to ensure final turn airspeed of 180 kts while using the AOA sight gauge as the primary indicator of a best performance turn. As long as the AOA was green donut (13 degrees) or less, you would not stall. If on speed and 13 degrees wasn’t going to get you around the turn to line up with the runway, you knew you were going to overshoot. You never wanted to see the red chevron of 15 degrees or more as that meant you were too slow, pulling too hard, and in danger of building an un-recoverable sink rate!
Few GA aircraft are currently equipped with AOA indicators, though there are several after market devices available for retrofit. However, knowing the impact of AOA and how to manage it is vital to safe aviating, even without an AOA gauge. The bottom line is, as long as you don’t ask the wing to produce more angle of attack than it can handle, you won’t stall.
Practicing final turn stalls, to know what the wing feels like as you get too slow or pull too much on the controls, increasing AOA past the critical point, will keep you safe when you encounter that unexpected overshooting wind or you find yourself inadvertently on too tight of a downwind leg. Better to overshoot or take it around to try again, than to pull too hard and exceed critical AOA.
Mike Hostage is a retired USAF pilot with 37 years of experience, flying a wide variety of aircraft. An instructor pilot for more than half of his 4800 flight hours, Mike is currently qualified in a Cirrus SR-22T and regularly flies his two homebuilt sailplanes.
You are hand-flying an in-the-weather descent, power back, heading for the FAF. You start a 30 degree banked turn at your lead point to cross the FAF, when your passenger behind you gasps. Looking over your shoulder, you see he has spilled his drink into his lap…too bad for him! However, when you turn your…
I am an iPad user, but I have an Android phone. I had been using a junky aviation weather app that just gave meters and TAFs, but seemed to have been programmed in a foreign language (un-decoded TAFs notwithstanding). I wanted something more robust, but didn’t see the need to pay for a Garmin Pilot subscription since Foreflight on my iPad was my main EFB (Electronic Flight Bag) I use in the airplane.
When I upgraded my phone, I decided I had to find something better. I have a WIFI only iPad, so I utilize my phone to take quick glances at weather reports or when I want to see the radar without having to tether my iPad to my phone. The app I had wasn’t cutting it.
That’s when I found FltPlan Go. We are all familiar with FltPlan.com. It’s what a lot of corporate pilots use to file flight plans. I’ve used it some, but there is a large amount of data it needs to set up an airplane. Since I already have all the airplanes I need in Foreflight, I don’t use it that much since I didn’t want to do the setup. It is rather handy as it spits out flight logs and has a lot of pre-loaded performance numbers for different makes and models.
FltPlan Go is FltPlan.com‘s app. It is very user friendly, easy to use, and, most importantly, free! You can get METARs, TAFs, NOTAMs, Airport Diagrams, approach plates, full weather reports for airports including radar, maps, and a whole lot more. As far as I can tell, it is a full fledged EFB. I haven’t really scratched the surface on all the features in using mine, but it is quite robust from the little bit of poking around I’ve done.
I’m still a Foreflight guy, but if you want something else or you have an Android phone and don’t want to pay for Garmin Pilot or WingXPro, check out FltPlan Go. It’s a winner.
I am an iPad user, but I have an Android phone. I had been using a junky aviation weather app that just gave meters and TAFs, but seemed to have been programmed in a foreign language (un-decoded TAFs notwithstanding). I wanted something more robust, but didn’t see the need to pay for a Garmin Pilot…
Recently, 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.
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.
Recently, 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…
Only now did I begin to realize the severity of the situation. The deer had completely broken the left main gear off of the airplane. Obviously, landing in this condition would not be ideal. Landing without a nose wheel is one thing, but landing without one of the mains would be a very dangerous and undesirable proposition.
The company’s maintenance guys arrived on the scene while I executed a few more low passes so that they could take a look. We all came to the same conclusion that the best situation for landing would be to retract the other two wheels so I could land on the belly. Unfortunately, the landing gear wouldn’t retract. Cranking the emergency gear handle didn’t work either as it is not designed to bring the wheels up, only to put them down.
I flew circles around the airport for a while as different options were all discussed. I owe a lot to the guys on the ground who were digging through the manuals coming up with solutions. Eventually, it was decided that I would try cranking the gear up by hand, even though the checklist in the airplane said that it could only be used to lower the gear. Even if we damaged the hand cranking mechanism, it would be worthwhile…plus, I’d already torn off the left main entirely, surely a little damage to the retraction mechanism wouldn’t be the end of the world!
Following the checklist, I pulled the CB for the gear motor and started cranking. To my great relief, the “in transit” light illuminated and the three green indication went away. It was difficult work to crank the gear up manually. The handle is in a very poor location in Barons and Bonanzas, plus I was working against gravity. It is also possible that there was some debris from the missing wheel causing friction or binding. While I was cranking, the rescue crews were being coordinated while extra vehicles and people had been called in from the city for support.
After some time had passed, enough to get a slightly sore arm from cranking, the lights indicated that the gear was up and locked. I lined up for one more pass hoping to verify that the landing gear was up and the landing gear doors were closed. After the final go ahead from everyone on the ground, all that was left was the landing.
I had been doing my best to keep the passengers informed of what was happening throughout the whole flight, but I felt bad for them as the news changed from the beginning of the flight: “precautionary landing” was quite different than the briefing I ended up giving them before we landed. I informed them that I was going to be “… killing the engines and landing with the gear up….” They did an impressive job of staying calm and being responsive. Before we landed, I made sure that they were all briefed on what to expect, how to unbuckle, and how to evacuate from the airplane. It is difficult to convince someone that everything is going to be fine when there are hordes of emergency vehicles (including ambulances) waiting next to the runway in anticipation of your landing.
Shortly before landing, I went through my flows and callouts, then verified by use of the checklist to ensure I hadn’t missed anything. I distinctly remember sitting in the airplane preparing for the landing, all the while being in complete disbelief that this was a real situation. I never imagined that I could be flying an airplane that was missing a wheel strut. Previously, my assumption had been that if there was an event serious enough to shear off one of my mains, the airplane wouldn’t continue flying. It all seemed like a bad dream.
I elected to use runway 26 since it was the longest. I wanted to be able to carry extra speed in order to give myself extra time between pulling the mixtures and landing so that I could feather the props and turn the fuel shut off valves to the off position (never thought I’d have to do that!) without being rushed. As I made my final approach with the engines shut off, I went through my final memory items and couldn’t help but laugh about just how backwards everything was from normal arrival procedure. GUMPS: Gas- Off (normally on the fullest tank), Under carriage- Up (Definitely not normal), Mixtures- Idle cut off (I normally save this for when I’m parked on the ramp), Props- Feathered (Again, never thought I’d have to do that in real life), Seatbelts- On (the only one that stayed the same!).
On final approach for runway 26 with the gear up and the props feathered. Photo Credit: www.lancasteronline.com
I’ve had several remarks about how quiet the airplane must have been during the final un-powered glide to the runway, and while that is absolutely true, I must confess that I never noticed. I was so focused on the task at hand that the silence in the airplane simply wasn’t something that stuck out to me. What did make an impression on me, however, was the acceleration the airplane experienced when the props were feathered. I’ve heard it preached many times the importance of feathering the propeller on a dead engine, but never truly appreciated the importance of it until I did it myself. I remember the airplane accelerating noticeably as though I had hit a boost button which was hidden somewhere in the cockpit for just such an occasion.
Although I didn’t notice the lack of noise upon killing the engines, the sickening, deafening noise which was produced during the touchdown and deceleration is something which I will never forget. Another thing that surprised me was the smoke which filled the cockpit and cabin as we slowed down. This was produced by the friction between the belly and the runway, although nothing was burning.
I don’t know how long the airplane actually slid for after touching down, but it felt like an eternity. However, when the noise subsided and the motion stopped everything returned to real time. I unfastened my seat belt, opened the door and climbed out onto the wing. I helped the passengers evacuate and we retreated to a safe distance on the side of the runway while the firefighters rushed in to do their job.
Tow Truck Unloading the Baron in the Maintenance Hangar
The step took the brunt of the runway damage and actually saved the right hand flap from contacting the runway at all
It was 8:35 am. So, from the time we took off to the time we landed was almost exactly an hour and a half. Not surprisingly, the passengers elected not to continue on to Pittsburgh and instead accepted a ride home in a car. The rest of my day was a blur of paperwork, reports, and phone calls.
Andrew Robinson is an airline pilot for Piedmont Airlines. He is a former 135 Charter Pilot and flight instructor who lives with his wife and 2 daughters in Pennsylvania. He instructs in Beechcraft Bonanzas.
Read Part 1 Here Only now did I begin to realize the severity of the situation. The deer had completely broken the left main gear off of the airplane. Obviously, landing in this condition would not be ideal. Landing without a nose wheel is one thing, but landing without one of the mains would be…
Type Clubs Lead By Example with Standard Operating Practices
This article appeared in the May 2019 edition of EAA’s Sport Aviation Magazine. It is used with permission. For other articles by Charlie Precourt, please visit EAA.org and join for a full subscription.
Imagine a year when there are no fatal accidents in general aviation. Does that seem impossible? The airlines achieved that many years ago, and so can we if we focus on the right things in our safety pro- grams. In fact, the overall trend in GA accident rates over the last few years is very encouraging. AOPA’s Air Safety Institute published its annual GA Accident Scorecard recently (see www.EAA.org/ extras), revealing fatal accidents from 2008 to 2017 are down more than 30 percent. Nevertheless, there were 185 fatal accidents in 2017, so we still have a long way to go. But, there are many developments in safety programs across GA that can keep the trend going.
One such development that I’ve advocated through a couple of type clubs is establishing standard operating practices (SOP). When I flew for both the U.S. Air Force and NASA, we had what we called standard operating procedures. They were the law for our flying. That is, we had to follow them procedurally because the folks that paid our salaries said so. The objective was to ensure we all used the same playbook, minimizing the risk that one of us might develop a bad in-flight habit that increased risk to the organization.
One way to think about SOPs is to recognize the difference between procedure and technique. For example, you have to follow the manufacturer’s pilot’s operating handbook (procedure)where it says to lower the landing gear before landing. If you don’t, you are in for a bad day. However, it does not tell you exactly when to lower the gear; that’s left to technique.
In the middle, between procedure and technique, is a best practice. In this example, lowering the gear just before the final approach fix is a “standard practice.” It is the generally accepted “best” place to lower the gear. In GA, however, aircraft owners don’t generally answer to a boss, so I prefer the term practices instead of procedures.
However, whether or not someone is paying us to fly, following best practices just makes sense. If you have a good set of practices, they enable you to do things the same way every time, leaving lots of brain cells to manage the unusual, the things that might go wrong. The safest approach to accomplishing a flight task is one that leverages consistency. On the other hand, if you are inconsistent, doing flight tasks differently each time, you’ll always be struggling to keep up. So, in my involvement with the safety committees for both the Malibu Mirage Owners and Pilots Association and the Citation Jet Pilots Association, there has been broad acceptance of recently developed standard operating practices.
The good news in this development is that a culture of safety is growing broadly across most sectors of GA through these type club initiatives. Perhaps more importantly, there is much to learn from each other about the effectiveness of these various initiatives. EAA has seen a four-year drop of 47 percent in fatal accidents among homebuilts! So, there must be something right going on there — a major focus on appropriate transition training before flying a new homebuilt (as a standard operating practice) is paying off.
So, what is covered in the SOPs these type clubs have developed? The following outlines the kinds of standard practices other type clubs have set up and represent SOPs you could establish for yourself regardless of the type of aircraft you fly. You just have to fill in the blanks for your particular type and commit to sticking to them in your flying. These are notional and are practices (not mandatory procedures). They don’t tell you how to fly your aircraft; they give you things to think about when you do. If you take a bit of time to set your own SOPs and then stick with them, you’ll be a far safer pilot. Here are some ideas:
Duty Day
Set the maximum number of hours of flight time during a calendar day and rest hours off between flying days. One example is a maximum of eight hours in the air and a minimum of 10 hours off until flying again.
Cargo
Establish best practices for what you will carry as cargo. One example is no lithium batteries in the baggage compartment.
Flight Planning and Preparation
What are your limitations for the types of flight you’ll take on? Consider SOPs such as designating a suitable alternate airport for all flights. Another might be for first flights after significant maintenance, such as no flight at night or in IMC until a day-VMC functional check flight has been done.
Runway Field Length Guidelines
Establish an appropriate minimum field length for your aircraft and commit to not going into shorter fields. Consider sea level operations and high-altitude airports as well.
Surface Operations
What should be your maximum wind conditions for taxi, takeoff, or landing? Maximum acceptable crosswinds on landing? Set them in your SOP and stick to them.
En Route
Consider establishing practices like no non-operationally necessary conversation below 10,000 feet MSL, during any segment of an approach procedure, or during the last 1,000 feet before leveloff during climb or descent. Also consider declaring “minimum fuel” when the fuel state becomes less than fuel to destination plus 45 minutes at current burn, even if flying day VFR.
Approach and Landing
Consider establishing personal minimums in your SOPs for things like visual approaches. Perhaps use a 1,500-foot ceiling and 3 miles’ visibility for day and 5 miles for night, even though these exceed the FAA’s requirements.
Pilot Limitations, Training, & Currency
FAR Part 91 rules allow us to fly with pretty marginal levels of currency. Consider setting your own SOP to something more appropriate for the kind of aircraft you fly and the kind of flying you do in it. For example, consider these ideas as SOPs:
If you have less than 100 hours of time-in-type or have not flown at least 15 hours as pilot in command in the last 90 days, use a minimum planned fuel reserve of one hour.
Also, if flying IFR in this situation, use a minimum visibility for takeoff of 1 mile.
On instrument approaches, increase the published minimums by one- half mile visibility and add 200 feet to the decision altitude or minimum descent altitude.
Perform landings at a weight that allows a full stop in 60 percent of available runway length.
Consider an SOP that establishes you will fly with a CFI on a refresher flight before flying as pilot in command if you have not logged at least an hour of flight time and one takeoff and landing in an aircraft of the same type within the preceding 45 days.
Maneuver Standards
Wherever there are “techniques” associated with things like takeoffs and climbs, cruise, use of autopilot, power settings, and approaches and landings, you can write down your preferred technique as your own SOP. Describe each maneuver in enough detail (speeds, altitudes, power settings, configurations, etc.) to define a routine you will use each time. This ensures you fly consistently each flight and leverage the power of the standard operating practice, that is, to give you the bandwidth you need should you encounter an unexpected event or an emergency.
SOPs are among the exciting concepts underway to make safety programs work for us. Hats off to type clubs like MMOPA and CJP and many others that are taking the initiative. But even if you’re not in this kind of group, you can still set up your own SOPs. Let’s all look forward to our first year in GA without a fatal accident — and let’s make it soon! Fly safe!
Charlie Precourt is a former NASA chief astronaut, space shuttle commander, and Air Force test pilot. He built a VariEze, owns a Piper JetPROP, and is a member of the EAA board of directors.
Type Clubs Lead By Example with Standard Operating Practices This article appeared in the May 2019 edition of EAA’s Sport Aviation Magazine. It is used with permission. For other articles by Charlie Precourt, please visit EAA.org and join for a full subscription. Imagine a year when there are no fatal accidents in general aviation. Does…
When a pilot thinks of an engine runup in a single engine piston airplane, typically it is let’s find out if the engine is running rough or not, meaning a spark plug is fouled. Believe it or not, there is a little more to learn from a runup than just checking the spark plugs.
A distinct advantage to having an engine monitor that monitors all EGTs and CHTs is you get a better idea of engine health. When switching to one magneto or the other during the runup, all the EGTs should rise, showing that the temperature of the exhaust gas is going up from each cylinder. This occurs because when running on only one magneto and one set of spark plugs in each cylinder, the mixture takes longer to burn, so, when the exhaust valve in the cylinder opens, the burn is still on going and this hits the EGT probe, causing a temperature rise. An indication of a magneto failure in flight would be a rise in all the cylinders EGT without a change in mixture setting.
Now that we know what to look for when checking each magneto, what would one look for to show that there is a problem? The basic that each student pilot is taught still applies. The engine manufacturer puts a limit on RPM drop during the runup. When checking one magneto or the other, watch for an excessive RPM drop. If the RPM drops past the limit, this usually will be accompanied by engine roughness.
Why is that? Let’s look at the cause for the excessive RPM drop. For this, we need to go back to our EGT indicators. Let’s say we have a 6 cylinder engine. When the key is turned to the right magneto, the RPM drops 250 RPM and the engine gets very rough. Look at the EGT gauge. The cylinders where the spark plugs are firing normally will all show a temperature. The cylinder (or cylinders) where there is no combustion, meaning a bad plug, will show no temperature. This is because the mixture is just sitting in the cylinder and not igniting, therefore, no exhaust gases will be pushed out so there will be no EGT indication for that cylinder. This is also how you tell a mechanic which cylinder to check for the bad plug.
It could also be a bad magneto. If multiple cylinders EGT all drop, or the engine wants to quit entirely, you have a bad magneto or bad ignition harness.
What else can you learn during the runup? Electrical system health is key, especially in all electric airplanes (meaning no vacuum system). It’s a very good idea to turn on all the lights and pitot heat to ensure that a rise is indicated on the ammeter. This means the alternator is carrying the load and working properly.
The next time you do your runup, keep an eye on your EGT to see the rise during a magneto check.
When a pilot thinks of an engine runup in a single engine piston airplane, typically it is let’s find out if the engine is running rough or not, meaning a spark plug is fouled. Believe it or not, there is a little more to learn from a runup than just checking the spark plugs. A…
