FAQ & Specifications
Q. What is the warranty? 18 months or 200 hours for the Airframe and Rotax engine, and 24 months for the Garmin Avionics
Q. Is Bristell taking orders for the Bristell LSA 915iS Turbo? YES
Q. What is the delivery time? about 7 months Less if you buy one of our inventory planes that can have custom graphics and the interior of your choice.
Q. Where can I see the Bristell demo and used aircraft for sale? Here under Inventory.
Q. What is the total process from deposit to LSA Transition Training? After the initial $33,000 deposit, the next factory production slot is reserved. The order will begin as soon as a slot is available. As of August 2020, the slot availability is one month. A panel design must be decided quickly as the panel is cut by early in the process. The BRS Recovery System has harness cables that must be installed in the beginning of the process. The engine needs to be ordered from Rotax right away to avoid production delays. Once the above items are taken care of, the process is about 4 months. The factory test flys all planes before they are shipped to the USA. The wings and tail are removed and two Bristell are placed in a shipping container. They will arrive in Lancaster, PA about 4 weeks later. The container is unloaded and the planes are re-assembled and certified with a US Registration. The Avionics are programmed, the ELT is programmed with the US Registration number, the data base us updated, Sirius Xm is activated and the planes are flown for a few hours to verify all system are proper. We are then ready to begin 5 hours of complimentary LSA training for pilots who arrive with a current BFR. Having experience flying an LSA with a Rotax engine and Garmin G3X Touch or G1000 avionics will make the training more efficient.
Q. Why is low empty weight important?
It allows for various engine choices and low empty weight results in superior climb. Superior climb means more time spent in the cool, clear air and a happy passenger.
Q. How does the Bristell compare with other LSA's? The Bristell often weighs 100 pounds less than the competition, has a steerable nose wheel, wing lockers, and a 51" wide cabin.
Q. Why is the Bristell lighter? Milan Bristela at BRM AERO uses expensive, light weight carbon fiber as much as possible. He uses 3 different grades of 6061 aluminum. The modern, reliable Rotax engine also saves weight.
Q. Has the factory and the importer been responsive to maintenance issues? The best in the industry by far. Just ask around. Bristell Aircraft's mission is to make "Ecstatically Happy Customers". You can speak with many Ecstatically Happy Bristell Customers.
Q. I have heard the Bristell wing has more dihedral than other planes. Why is this important?
The generous dihedral makes the plane stable in turns as the low wing produces more lift than the high wing and helps the plane return to level flight on its own. The generous dihedral allows more ground clearance for better cross wind landing characteristics. The generous dihedral allows fuel to flow by gravity towards the engine resulting in 31.6 gallons usable fuel out of 32 gallons total.
Q. Can you get the Bristell 915iS Turbo with larger fuel capacity? YES. Optional 39 gallon tanks are available.
Q. Can a pilot that is 6'8" tall and weighs 280 pound fit in a Bristell? YES
FAQ: Can I fly IFR in IMC in a Bristell?
YES, provided the following conditions are met:
The Plane: The Bristell needs to be certified as an ELSA. If this is done at time of certification, there is no additional charge. If you have your new Bristell certified as an S LSA it can be used commercially, as in a flight school. If you would like to fly IFR in IMC, the certification needs to be changed to E LSA. This should cost about $2000 and done by a DAR.
The plane needs an IFR Certified piece of Avionics. Your choices are:
The VAL 2000 NAV. The Val 2000 will enable navigation on VOR and ILS, the Autopilot will follow the Val 2000 signal. The Garmin GNX375 which allows for both horizontal and vertical navigation following the GPS signal. The Garmin GNC 255A which allows for Com and VOR and ILS navigation. The Garmin GTN 650 which allows for a Com, and VOR and ILS Navigation and GPS navigation.
The Pilot: The pilot needs to be IFR rated, have a current BFR and medical.
FAQ: 100 LL or 93 OCT Premium 10% Ethanol Auto Gas...which is best?
Go to the bottom of the page for the answer.
Specifications for Your Luxury Light-Sport Aircraft
Call for Details (833) 235-9274 (press 1 and ask for website sales)
27 ft Performance Wing Lighter & Faster
30 ft Standard Wing Best for High Altitudes
The Bristell 914 Turbo is a good choice for economical high altitude operations. Watch the video below for more information.
27 ft Performance Wing Faster roll rate, lighter and faster
The Bristell 915iS Turbo is our best climbing and fastest Bristell. Watch the short video below.
Vne Never Exceed Speed of 145 KIAS Very Strong Aircraft
Bristell 915iS with Flush Rivets 170 MPH @ 12,500 FEET
Heavy items go in the wing lockers Easy to stay within the CG
Introducing the Bristell B23 a new FAR Part 23 Certified plane for major flight schools. Can be flown IFR in IMC. Has been spin tested. Aircraft recovery System is standard on all B23 aircraft. Gross Weight 1650 lbs. Empty Weight 957 lbs. Useful Load 693 lbs. $285,000 US dollars.
2020 B23 MT Variable Pitch Prop, Dual Garmin G3X Screens, Garmin GNC 255A NAV/COM + VOR/ILS, GTX45R, GPS20A WAAS/GPS + GA35, Back up battery for G3X Touch, Intercom PM 3000 stereo, Tosten CS6 grips, LED strip with dimmer for night instrument lightning, BOSE LEMO connectors, KANAD 407 ELT
"The air up there in the clouds is very pure and fine, bracing and delicious. And why shouldn't it be? It is the same the angels breathe." -Mark Twain
|SPECIFICATIONS||912 ULS 100 HP B8||912iS Sport 100 HP Fuel Injected||914 ULS 115 HP Turbo||915iS Sport 141 HP Turbo||912 ULS LONG WING||TDO||B23 FAR 23 Certified|
|Wing Span||30 feet||27 feet||27 feet||27 feet||30' 8" feet||30 FEET||30 FEET|
|Wing Area||126 square feet||113 square feet||113 square feet||113 square feet||161' 7" square feet||126 square feet||126.48 SQ FT|
|Wing Loading||10.45 lbs per SQ FT||11.69 lbs per SQ FT||11.69 lbs per SQ FT||11.69 lbs per SQ FT||8.2 lbs per sq ft||10.45 lbs per SQ FT||13.0 lbs per sq ft|
|Stall with Full Flaps Vso||32 KIAS||38 KIAS||38 KIAS||38 KIAS||38 KIAS 41 MPH||32 KIAS||41 KCAS|
|Stall No Flaps Vs1||38 KIAS||44 KIAS||44 KIAS||44 KIAS||41 KIAS 47 MPH||38 KIAS||48 KCAS|
|Maneuvering Speed Va||89 KIAS||96 KIAS||96 KIAS||96 KIAS||70 KIAS 80 MPH||89 KIAS||96 KIAS|
|Never Exceed Speed Vne||145 KIAS||157 KIAS||157 KIAS||157 KIAS||100 KIAS 115 MPH||145 KIAS||157 KIAS|
|Cross Wind Component||15 kts||15 kts||15 kts||15 kts||12 mph||12 kts||15 kts|
|Length 21.1 feet||Height 7.5 feet||Width 51 inches||Width 51 inches||Width 51 inches||width 46 inches||Length 21.1 feet||Length 21.16 feet|
|Storage 128 pounds||33 lbs in the cabin||33 lbs in cabin||44 lbs in each wing||44 lbs in right wing||30 lbs||33 lbs in cabin||33 lbs in cabin|
|CARBS OR INJECTION||Carburetors||Fuel Injection||Turbo, Carburetors||Turbo, Fuel Injected, Intercooler||Carburetors||Carburetors||Carburetors|
|Climb at Sea Level||700 fpm||1000 fpm||1200 fpm||1490 fpm||600 fpm||800 fpm||732 fpm|
|Cruise Sea Level||120 KIAS||120 KIAS||120 KIAS||120 KIAS||ECO 80 MPH||120 KIAS||125 KIAS|
|5000 FT ECO CRUISE 5000 RPM||110 KTAS||110 KTAS||115 KTAS||125 KTAS||80 MPH||112 KTAS||115 KTAS|
|Indicated Airspeed||100 KIAS||100 KIAS||110 KIAS||118 KIAS||70 mph||102 KIAS||110 KIAS|
|KTAS 10,000 FEET 5000 RPM||110 TAS||110 TAS||120 TAS||130 KTAS||80 mph||113 TAS||120 TAS|
|Fuel Burn||4 gph||5 gph||5.4 gph||5 GPH||5 gph||4 gph||5 gph|
|Fuel Capacity||31.7 useable||31.7 useable||31.7 useable||38.8||21 gl||31.7 useable||31.7 useable|
|Endurance||7.5 hours||6.3 hours||5.2 hours||7.0 hours||4.0 hours||7.5 hours||6.3 hours|
|Range: nautical miles-no reserves||800 nm||743 nm||665 nm||910 nm||300 miles||816 nm||665 nm|
|10,000 FT MAX CRUISE 5500 RPM||105 KTAS||105 KTAS||120 KTAS||141 KTAS AT 10,000 FEET 5500 RPM||70 mph||108 KTAS||125 KTAS|
|Indicated Airspeed||90 KIAS||92 KIAS||120 KIAS||125 KIAS||75 KIAS||93 KIAS||120 KIAS|
|True Airspeed knots||100 KTAS||103 KTAS||115 KTAS||141 KTAS 162 MPH AT 10,000 FEET 5500 RPM||85 KIAS||103 KTAS||120 KTAS|
|Fuel Burn||5 gph||6 gph||7 gph||8 GPH||5 GPH||5 gph||5 gph|
|Endurance||6.1 hours||5.1 hours||4.5 hours||5.0||4.0 HOURS||6.1 hours||6.1 hours|
|Range||610 nm||520 nm||638 nm||700 NM||300 MILES||625 nm||520 nm|
|Practical Ceiling||14,000 feet||15,000 feet||15,000 feet||15,000 feet 23,000 ABSOLUTE||10,000 feet||15,000 feet||15,000 feet|
|Take Off Distance||800 feet||800 feet||700 feet||660 FEET 990 grass||600 feet||500 feet||1191 feet|
|Take Off over 50 ft Obstacle||1800 feet||1700 ft||1600 ft||1500 FT 1780 Grass||1500 ft||1500 feet||1538 feet|
|Gross Weight||1320 pounds||1320 pounds||1320 pounds||1320 pounds||1440 pounds||1320 pounds||1650 pounds|
|Empty Weight||740 lbs. est.||770 lbs. est.||810 lbs. est.||850 lbs. est.||900 lbs. est.||700 lbs. est.||957 lbs|
|Usefull Load||580 pounds||550 pounds||510 pounds||470 pounds||540 pounds||620 pounds||693 pounds|
|Vx||65 KIAS||65 KIAS||65 KIAS||65 KIAS||65 KIAS||65 KIAS||60 KIAS|
|75 KIAS||75 KIAS||75 KIAS||75 KIAS||75 KIAS||75 KIAS||75 KIAS||75 KIAS|
|Cabin Width||51 inches||Wider than a Cirrus||6' 8" tall pilot fits||280 lb pilot fits||step on spar, not on wing||Do not need to step over flap||49 inches|
FAQ: 100 LL or 93 OCT Premium 10% Ethanol Auto Gas...which is best?
Mogas vs 100LL
Upsides and downsides BY CAROL AND BRIAN CARPENTER
ONE OF THE MOST requested topics for us to weigh in on is avgas (aviation fuel) versus mogas (automotive fuel) in light-sport aircraft. This is also one of the more controversial subjects that makes it very difficult to write an article that is definitive on the subject. We often get questions like, “What type of fuel should I be using in my light-sport aircraft?” This is akin to the question, “Do these pants make me look fat?” Your first instinct should be to change the subject as quickly as possible. God forbid you do elect to engage, you need to recognize that the conversation is going to morph into many other unrelated topics, and nothing you say is going to be an acceptable answer. Several years ago, we did a two-hour presentation on the subject for the RV-12 fly-in in Bend, Oregon. The first hour of the presentation was all the reasons that you shouldn’t use avgas in your Rotax engine, and the second hour of the presentation was all the reasons that you shouldn’t use mogas in your Rotax engine. Well, that wasn’t very helpful, was it? But that was the point. If there was not a downside to a particular fuel, it would be a no-brainer for everyone just to select that particular type of fuel. It would also be easy for the manufacturer of each engine and each airframe to recommend only one type of fuel. So it is a matter of choosing the fuel for a particular mission profile that provides the least number of downsides. Or, if you like, the fuel that is best suited for your mission profile. When we use the term “mission profile” we are talking about a particular set of operating circumstances. Your mission profile may change throughout the year. As a result, the type of fuel you may want to use will also change. It is important to identify the downsides of each type of fuel in order to make a judgment about how it will impact your airframe and engine under these operating conditions. Because each fuel has its own downsides, it is important to understand what additional maintenance or operating conditions need to be performed to mitigate or eliminate any potential problems that may arise from each of the two very different types of fuel. In an effort to emulate our two-hour presentation on avgas versus mogas, let’s start off with the downsides of avgas. On our list of downsides, we have simplified the list into two primary reasons for not using avgas: tetraethyl lead and cost. Tetraethyl lead is the primary concern when using aviation fuel. Tetraethyl lead is the additive added to aviation fuel that provides the anti-detonation properties (octane). This stuff forms deposits that can cause problems over time in different ways. It tends to foul spark plugs, build up deposits on the pistons and rings, and sludge up the oil system. Even as late as 2004, Rotax was still fighting the battle of operators using the wrong type of oil in conjunction with avgas. In its ongoing attempt to provide more guidance on the proper type of oil to use for each mission profile, Rotax issued service instruction SI-18-1997 R5 (now superseded). In the body of that text for the service instruction, it provided a simple summary of the problem. “The lead content of currently available leaded avgas fuels is very high,” the service instruction states. “The 100 LL avgas commonly available in North America contains up to 0.58 ml/liter of tetraethyl lead, more than four times the lead found in the leaded 80/87 avgas previously available. Due to this extremely high lead content, residue formation leading to operating difficulties with valve and piston ring sticking and cylinder wall glazing occurs more frequently when engines are primarily operated with leaded avgas fuels. Lead deposits could cause glazing of the cylinder walls.” It wasn’t so much a problem exclusively with the avgas, but rather the multitude of different oils that operators were experimenting with in conjunction with the avgas. Well, even this updated service instruction didn’t put the issue to rest. As a result, we are currently working under service instruction 912-016R10. This latest endeavor to improve reliability and safety involved partnering with AeroShell to develop an oil (AeroShell Sport Plus 4) that is specifically designed for the Rotax 9 series engines.
According to AeroShell, the oil is designed to cope with the high shear stresses associated with integrated gearboxes and overload clutches. It also has detergents that help to keep critical areas, such as pistons and cylinders, clean. All the other oils that operators had been using for years are now absent from the list of approved oils. The AeroShell Sport Plus 4 oil is now the only oil recommended by Rotax for both avgas and mogas. It appears that Rotax is banking on standardization to prevent many of the ill-fated experiments that were ongoing in the past. Not only that, it allows Rotax to work directly with AeroShell to make any “tweaks” that are necessary to improve performance and reliability as time goes on — and we have seen that happen already. The newest formulation of Sport Plus 4 oil is now packaged in a distinctive red bottle to differentiate it from the earlier version supplied in the black bottles. Rotax still allows the use of the original oil in the black bottles, but only until they have reached their expiration date. One of the obvious advantages of the Sport Plus 4 oil is its ability to hold the tetraethyl lead in solution so that it can be extracted from the engine at oil change. In the early days, we used to take an airplane in for annual. If the owner was using some obscure oil, we would take an oil sample in a quart jar and watch the tetraethyl lead fall out of solution and settle on the bottom of the jar literally within hours of taking the oil sample. Not good. Conducting the same test using the AeroShell oil shows no separation even after many months of sitting. One of the other methods that Rotax employs to mitigate the effects of tetraethyl lead is to change the oil on a more frequent basis. The Rotax maintenance manual gives good guidance on the oil change interval depending on the percentage of avgas used. The premise is that changing the oil more frequently will reduce the amount of tetraethyl lead that the engine is exposed to. Everyone agrees that the tetraethyl lead is a downside of avgas. Even in the conclusion of the most recent Rotax service instruction, it states, “If possible, operate the listed engine types using unleaded or low-lead fuel. (AVGAS 100 LL is not considered low leaded in this context.)” This statement makes it pretty clear that Rotax favors the use of automotive fuel over 100LL. The second item on our list of downsides for avgas is cost. Not just the cost of fuel, but the cost of doubling up on your oil changes and the increased maintenance costs associated with operating 100LL. Even if you are of the mindset that cost should not play a role in the decision of which fuel to use, we must bring the total cost of operation variable into the equation. For many people, the cost of operation can be the tipping point between flying and not flying. The $100 hamburger used to be considered a joke. Nowadays, it is more like an aspirational goal that is often dreamt about but seldom achieved. The cost of fuel is a significant portion of the operating costs for any airplane. The good news is that the vast majority of light-sport aircraft use engines that are literally sipping fuel compared to our big Lycoming and Continental brethren. Using automotive fuel in lieu of aviation fuel can improve the bottom line of the operating cost. But only when it makes sense. So far, in this article, all we have talked about are the downsides of avgas. If you’ve come to the conclusion that avgas should not be used on a Rotax 912 engine, hold your horses. If you think we painted a bleak picture here, wait until we talk about the use of automotive fuel in light-sport aircraft and engines. In Part 2, we will do just that. We will talk about all the downsides to using automotive fuel and show you some of the reasons why you may think that automotive fuel should not be used on a Rotax 912 engine. The good news is, it’s not the end of the world. Never fear. We will help to sort out when it would be a better idea to use one type of fuel over the other, and what to do to mitigate the negative effects of each type of fuel. When approached appropriately, there isn’t any reason why your engine can’t reach TBO using either of these two types of fuel.
In the beginning of this article, we looked primarily at the downsides of using 100LL fuel. In this article, we will look a bit more in-depth about the use of auto fuel or mogas as it is often referred to. We identified in the previous article that Rotax allows the use of avgas as well as mogas. However, it was clear that in all the service bulletin and maintenance manual information available from Rotax, there were significant concerns and operating recommendations to mitigate the negative side effects when using highly leaded aviation fuels such as 100LL. Working with the premise that Rotax favors the use of mogas over avgas begs the question: Why would we not always use mogas in our Rotax engines? Well, that’s exactly what we’re going to address in this article. Methanol and ethanol are the two most common alcohols used in automotive fuel today. And like the bigger topic of avgas versus mogas, there are upsides and downsides to their use. First the upsides. Both of these alcohols have a relatively high octane rating, approximately 109 RON (research octane number) and 90 MON (motor octane number), which equates to approximately 99 AKI (anti-knock index). And due to their lower carbon-to-hydrogen ratios, these fuels have lower toxic emissions and improved engine efficiency. Now for the downsides. Both fuels contain what are called halide ions. Halide ions are primarily responsible for the increased corrosivity of the fuels. Both from a direct chemical attack as well as increasing the conductivity of the fuels, which promotes increased galvanic and direct electrochemical attack. To make matters worse, ethanol is hygroscopic and readily attracts water from its surrounding environment. Whether you attribute the resulting corrosion primarily to the ethanol or the water is kind of a moot point when considering the final result. Figure 1 shows an example of corrosion within a Bing carburetor float bowl mounted on a Rotax 582. This condition is the result of only a few months of exposure to ethanol-based fuel. The oxidation of the brass caused the formation of deposits on most of the jet, but more significantly on the inside diameter of the main jet. This reduced the flow of fuel through the main jet. You can think of it as a partially Both fuels [methanol and ethanol] contain what are called halide ions. Halide ions are primarily responsible for the increased corrosivity of the fuels. clogged drainpipe reducing the flow of water in your sink drain. However, in this case, the reduced flow through the main jet caused a lean fuel-air mixture and subsequent seizure of the cylinder associated with this carburetor. (Figure 2) Regardless, it’s safe to say that corrosion within your fuel system — whether it is in the fuel tank, fuel pump, fuel lines, or carburetor — is a high-risk bullet point that we would like to avoid. If you happen to have access to fuel without ethanol, consider yourself fortunate. Many operators of lightsport aircraft (LSA) are not so lucky. If you’re having trouble finding non-ethanol fuel, check out www.Pure-Gas.org. Out of the 14,000 stations listed, only 20 show up for the entire state of California. Our little town of Corning is one of the lucky ones. When E10 first became the new normal, the Rotax engines were only authorized to use a maximum of 5 percent ethanol. It took Rotax many years to accept the new 10 percent ethanol standard, which it now authorizes in its maintenance manual. We only bring this up because, in recent months, we have seen the EPA fast-tracking modifications to legislation that would allow the use of E15 fuel to be sold year-round without any additional modifications to the Reid vapor pressure (RVP) requirements. It will be interesting to see how Rotax addresses the E15 fuel. Both ethanol and the aromatic hydrocarbons that are in gasoline (such as benzene, toluene, and xylene) have shown to be incompatible with some polymers. Many of these aromatic hydrocarbons have been shown to react with a variety of polymers, causing swelling and in many cases breaking down the carbon-carbon bonds in the polymer that reduces its tensile strength. When we say polymers, we are talking about a wide variety of materials. However, for our purposes, it’s primarily parts that are rubber and plastic within our fuel system as well the resins and epoxies used in composite structures. We had a great example of how these compounds affected rubber when we switched from 100LL to auto fuel in the Ranger aircraft. (Figure 3) The aircraft sat for nearly a month after the first introduction to auto fuel. When we were preparing to fly the aircraft again after this period of inactivity, we found that rubber on the fuel caps had swollen up so much that it was nearly impossible to remove them. After switching back to 100LL, the rubber returned to its natural state, and was there ever after, functioning as designed. In the early days of the auto fuel STCs, many aircraft we worked on experienced the same type of problems, but on a much more intense level. We often used to joke that the added maintenance costs would typically exceed the fuel savings for at least the first year. However, once all the hoses, gaskets, O-rings, and general fuel system components had been converted to components that were compatible with auto fuel, the vast majority of problems began to dissipate. And ironically, the bulk of these problems were directly related to owners using ethanol-based fuels, which were never approved fuels per the STC.
The one area that continues to haunt the LSA community is the use of auto fuel in conjunction with composite fuel tanks. Many of the older types of epoxy worked well with auto fuel up until the formulations changed and began to incorporate the use of ethanol and increased percentage of aromatics, even on the non-methanol containing fuel (E0). Oftentimes, it isn’t obvious that there is a problem until several years have passed, and we start to see the results of the fuel degrading the composite structures. Manufacturers of new aircraft have started to take this to heart and are employing many new techniques to mitigate the effects of the new fuel formulations, including new types of epoxies and the use of fuel tank sealing compounds that are compatible with the myriad of chemical compounds found in modern fuels. Although new aircraft occasionally have problems, the vast majority of auto-fuel-related fuel tank problems relate back to the older aircraft. For many years now we’ve had a standard recommendation that if you have a composite fuel tank or, more importantly, a composite aircraft with a “wet wing,” you should avoid auto fuel unless the manufacturer specifically authorizes its use. Figure 4 shows the float bowl off of a Rotax 912 where the fuel tank epoxy is reverting from a solid to a liquid state, then coating, sticking, and gumming up the fuel filter, fuel pump, fuel valves, and the carburetor. Who knows what kind of damage could have been done to the engine itself if it were able to run with fuel contamination of this severity. Even after flushing the fuel tanks several times and reverting to 100LL, the carburetors continued to need disassembly and cleaning several different times over the course of a month because of what was obviously contamination from the original epoxy problem. The other area that is really hard to pin down is the myriad of magic potion additives that owners experiment with. We are often suspicious when we see one-off problems that are related to the fuel system, especially when we know the aircraft owner has been watching way too many late-night infomercials. When you decide to take on the role of a chemist, who knows what you might end up with when combining all those different chemicals together. Remember, if the engine and airframe manufacturer does not recommend your favorite additive, you are now part of the research and development team for this particular product on your particular aircraft and engine. As a final thought about automotive fuel, we need to talk about its relatively short shelf life. Unlike aviation fuel, auto fuel may have a shelf life anywhere from 90 days to a year from the date of its blending. A great deal of this variable is dependent upon how the fuel is stored. Because aircraft fuel tanks are vented, they are exposed to the atmosphere allowing many of the different compounds within the fuel to evaporate or degrade. As the gasoline ages, it will become less volatile, making it harder to start the engine. More importantly, it may lose octane, which is our protection against detonation within the engine. This is where the proponents of fuel stabilizers begin their sales pitch. Although we are not against the use of fuel stabilizers, this falls under the category of additives, so we will almost always defer to the engine and airframe manufacturers for suitability. The general rule that seems to have permeated the LSA industry is that auto fuel has a reliable shelf life of about 30 days. One of the reasons for this relatively conservative number is all of the unknown variables that come into play that you have no control over, especially what has happened to the fuel between the blending and the time that you pump it into your airplane. Therefore, we typically buy from gas stations that are right on the freeway with relatively high turnover in fuel sales. Buying fuel from a mom-and-pop operation that has not bought a fuel load in six months puts you at a distinct disadvantage to start with. Interestingly, the statistics on premium gas is that it is only about 5 percent of total gas sales. This means that the premium fuel will have been sitting in the ground for a considerably longer period than the fuel that comes out of the regular pump. Also, gasoline that has been stored for a considerable period turns into a varnish-like substance that coats the internal components of a carburetor. Out of the hundreds of carburetors that we have torn down for troubleshooting, repair, or rebuild, the one universal characteristic seems to be varnish buildup that needs to be addressed. If you are using auto gas and don’t fly often, it’s essential you have a simple, easy, reliable, and safe way to remove fuel from your aircraft and get it into your car. This being said, the best way to remove gas from your airplane is to fly on a regular basis. It is also one of the best things you can do for your aircraft as a preventive maintenance item. And yes, if you need a note for your spouse explaining the necessity for this frequent flying on the basis of safety, we would be happy to provide that. In Part 1 of this article, we talked about some of the pros and cons of the use of avgas. In this article, Part 2, we have addressed the same regarding auto fuel. In the next article, Part 3, we will tie this all together to give you some recommendations on what type of fuel you should be using and how to mitigate any of the downsides associated with each type of fuel.
DOWNSIDES OF AVGAS ● Tetraethyl Lead ● Expensive
DOWNSIDES OF MOGAS ● Alcohol and Methanol ● Effect on Composite Materials ● Short Useful Life ● Vapor Lock ● Different Formulas Accessibility