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champion aviation spark plug resistance check

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[…] Predictably, this provoked a rather hostile response from Champion. Just today I found 3 out of 8 that were bad with the resistance check. Check the resistance between the center electrode and the conductor in the spark plug well as described in the first-part of this series. Replace any plug above 5000 OHMS. How other people maintain and operate their airplanes, I know not. When spark plugs are new, the resistance value is between 500 and 3000 ohms. about 125 hours after a factory overhaul my Lyc IO-360 was grounded due to rough running. Both of these represent good resistance values right in the sweet spot. have a look if you haven’t. Hopefully they will take care of the people out there that have spent money on the bad plugs and replace them with the new design. Champion Aerospace designs and manufactures Champion-brand piston-engine ignition components for both OEM and aftermarket for general aviation aircraft applications. I applaud Champion Aerospace for improving its product. Last fall, during a plug “bomb” test, two of the plugs didn’t pass. These plugs came from cyls 2 and 3, which run hottest in the engine. BTW, the problem can not be tested and identified at run-up since the pressure in the combustion chamber is less than during high power climb/cruise and hence require less voltage to arc over, and the air pressure inside the magneto is higher, resulting in higher break over voltages. Mike, can you show pictures of the old and new metal contact you’re talking about for identification purposes? “wonder why it took six years for the company to work through its grief from denial to acceptance”. They explained that the silicon carbide resistor in Champion-brand plugs is made to show the proper resistance whenever a high-voltage pulse is present, and can’t necessarily be measured properly with an ohmmeter. World leader in aerospace ignition & power systems, Spirit of St. Louis 2016 Airshow Photo Gallery. I never checked the resistance and never had a miss or a rough moment with the engine (and no mag problems, if that was going to be your next question). but champion’s quality assurance obviously doesn’t care, nor their management. But I would not jump to the conclusion that Tempest has discovered some previously unknown secret about spark plugs, except maybe how to sell them. Any spark plug showing a resistance of greater than 5K Ohms should be replaced. i get hot start performance now due to the electronic ignition on my fuel injected Lyc 4 banger. I have used Aircraft Magneto Service (aka Cliff Orcutt) exclusively for mag rebuilds during the same period and had great results using his mags and 5k testing techniques. Adding a resistor to the plug also raised the minimum firing voltage for a given electrode gap. visually, the rivet operation was done obviously wrong. The remainder were either cracked or open resistance. Champion Aerospace has pioneered a power supply system described as a Passively Controlled Transformer Rectifier Unit (PCTRU). Champion Aerospace designs and manufactures Champion-brand piston-engine ignition components for both OEM and aftermarket for general aviation aircraft applications. i’m a mechanical guy, not a spark chaser, but even i can tell, that aint right. Champion turbine igniters are a product of the Champion Aerospace commitment to the highest standards of quality and technology – a commitment that has made Champion the #1 igniter choice of engine manufacturers, maintenance technicians, and pilots around the world. The IA/AP simply places the spark plug, barrel side down over the contact post and touches the other lead end to the firing end of the center electrode. Resistance values were 20,000 ohms or more for some of the plugs. Spark plug wires normally last … Champion management tried to cover it up by lying… so we won’t be purchasing their plugs again – even with the improved design. This plug was made in Mexico. Champion Aerospace is preparing for the age of the More Electric Aircraft (MEA) or All Electric Aircraft (AEA) by transforming its highly pedigreed 28VDC Transformer Rectifier Unit (TRU) to a 270VDC or 540VDC Power Supply system to support operation of new electromechanical equipment that will replace traditional pneumatic or hydraulic power. They didn’t last long, either. We used to use Auburns, which had that molded-in resistor, amd they lasted forever. As the preferred supplier of spark plugs for general aviation aircraft, Champion Aerospace designs, engineers and manufactures piston-engine ignition components for both OEM and aftermarket applications. They should have adopted Auburns design immediately. After all, the plugs did cost close to $1200. Hot-Lock Nickel Plated Shell Seal dramatically increases strength, rigidity and resistance to lift. Cessna 172N Skyhawk High Resistance The pilot observed a unusually high EGT reading. If a spark plug falls off a workbench or is dropped, it’s possible for the carbon resistor to break. I’ve had brand new champions that fail with in a few hours. Center wire resistance values of any resistor type spark plug shall be as specified in the manufacturer’s drawings or specifications. N III additionally, the electronic ignition driven plugs all have reduced life. In today’s plugs, a resistor is built in to eliminate radio frequency interference. Many plugs measured tens or hundreds of thousand ohms, and it wasn’t unusual to find plugs that measured in the megohm range or even totally open-circuit. One very unfortunate scenario could happen if one spark plug is bad (open resistor) and the next in the firing sequence is “good” – the arc could conceivably jump inside the magneto to the next cylinder in the firing sequence! I can only report the data from my airplane operations. A typical low voltage ohm meter (or the Tempest AT-5k meter which relies on a low voltage circuit) can help identify suspect plugs. max’s You Tube video is worth watching Now then, Champion has been building spark plugs for a while, a long while. The average spark plug fires 8 million times during 100 hours of flight. If the solution to the problem was a long time coming, they certainly have recognized that their customers are their best assets. As a powerful symbol of performance driven quality, this experience and commitment has led to design enhancements that optimize the performance of every spark plug we make. So far all looks good. Nor did it agree with the Mil Spec for aviation spark plugs (MIL-S-7886B) which states clearly: 4.7.2 Resistor. In researching this issue, I looked at the magneto troubleshooting guide on the Aircraft Magneto Service website, maintained by mag guru Cliff Orcutt who knows more about aircraft ignition systems than just about anyone I know. Will do a resistance check at next oil change. These extremely reliable resistors are formed from strontium carbonate, aluminum oxide and copper oxide powders. He mentioned the new design, and said he would overnight a complete new set to me. Lets see do I want old tech or new tech plugs. In the meantime, we’re all stuck with $400+ per engine in defective Champion plugs until we have to come up with spare $ to buy Tempests. Doing it right takes more than desire, it takes good set up tools. To draw a recent analogy from the automotive world: A lot of people drove GM cars with faulty ignitions and never had a problem; but that doesn’t mean people weren’t killed and a recall wasn’t necessary. who ever made it didn’t care. From innovation aviation technology to a tradition of motorsports dominance, the Champion brand has been a part of product development in every type of engine. when it comes to resistor plugs the proof is in the measuring, I own a mooney M20F EXE in and I have experimented two engine faillure caused probably for this reason , and have the second with brand new cylinder with about 15 hrs tt ,this is probably scrap at this time, The temperature have grow up to 750 in about 50 -70 second max It requires high voltage such as the CT475 cleaner/tester. … Nerheim also disassembled the resistor assemblies of a number of high-resistance Champion plugs and found that the internal resistor “slugs” were failing. Further, they stated that the proper way to test a spark plug is on a spark plug testing machine (so-called “bomb tester”), and claimed that if a plug functions well during a bomb test, it should function well in the airplane. Champion Aerospace is a global leading manufacturer of aero, marine and industrial ignition systems for turbine engine powered applications. A spark plug is a device installed at the top of an engine cylinder that generates sparks at the tip of its electrode when a high voltage is applied across its terminal ends, thus igniting the compressed air-fuel mixture in the cylinder. read into the trends and the company behavior…. who ever inspected it didn’t care. As the plug ages, values below 5000 ohms are acceptable. I am glad that Champion is finally doing something about it. The design has been around for over 60 years, it just cost more to manufacture. I tested them first on the Tempest gizmo ( it is fairly quick and accurate) then because of the red light (failing), tested for the Ohms value.They were all very high. The sure sign of a plug being faulty is a crack or multiple cracks on its porcelain cover. We have a culture based on values that encourage the continual improvement of our products, processes and quality system. This operating voltage provides improved electrical efficiency, drives lower aircraft weight, improves aircraft safety/reliability and provides positive environmental impacts. I had poor starting and two cylinder had regular fouled plugs in my 2004 C182T. The spit really hit the fan when Champion’s primary competitor in the aviation spark plug space, Aero Accessories, Inc., launched a marketing campaign to promote sales of its Tempest-brand aviation spark plugs by highlighting the resistance issue. it’s obviously their attitude – from the top down. I first became aware of the Champion spark plug resistor problem in 2010, although there’s evidence that it dates back to 2008. Since the 1950s, Champion brand power supply (TRU) products have been trusted for commercial and military airborne use. No Tempest didn’t in discover anything new, they used a very old design that has been in the BG plugs I run in my Waco. As a “Motörhead” I often wonder what the perfect spark gap voltage is, well in this case it is about 0.05′ across the spark plug gap and another about 0.5′ gap across the resistor! 270VDC is accomplished by rectifying the traditional 3 phase 115VAC 400Hz line-to-line voltages via typical AC-DC conversion methods that meet requirements of MIL-STD-704. Hey Mark, a local flyer here was having some trouble with his Comanche running smooth so we started with his SP only to find (1) out of the (12) to be in “serviceable” condition. Reduced electricity results in not enough spark to ignite the gasoline mixture that fires the engine. I believe that Champion had to change because the Tempest advertising barrage got the herd to scampering. The silicon carbide resistor is a high voltage device and cannot be tested with a standard ohm meter. Nerheim’s findings flatly contradicted Champion’s company line, and agreed with what we were seeing in the field. An Ohm meter, which is part of a multimeter, can only check a spark plug for a short circuit or a breakdown of insulation resistance. Experimentation showed that a resistance between 1K and 4K ohms turned out to be a good compromise between ignition performance and electrode longevity. I remove plugs at 100 hours to clean the lead out of the bottom plugs, manually, I do not sandblast; I never had to re-gap them. Shop Champion spark plugs for automotive, lawn and garden and marine applications on ChampionIridiumPlugs.com - an authorized Champion Auto Parts dealer. Spark plug wires deliver thousands of volts – up to 45.000V, depending on the application – to the spark plugs. Service and response from Champion was excellent. I suppose grief is a very personal thing, and everyone deals with it differently. Mr. Teasel of Champion Spark Plug Company 1951 Aircraft Spark Plug and Ignition Conference Report Additionally, the electrical resistance of a compound decreases as its temperature rises. When the job has to be done, we always say, do it right. And it happened regularly, not just to me but to others at my airport. Even had a 400-hour warranty. Please click here to email Champion Aerospace. Engine generally starts in 1-2 revolutions hot or cold. i guess you can say spark plugs are a fault tolerant design. 06-17-2020 - Champion Aerospace awarded Elite Supplier Status from Lockheed Martin, 05-10-2018 - Champion Aerospace announces AS9100 Rev D Certification, 1230 Old Norris Road Two layers of corrosion protection. The most automated manufacturing processes and the most innovative spark plug in the aviation industry.. High Conductivity Copper Core Center Electrode Copper, co-extruded inside a nickel alloy sleeve ensures outstanding heat and electrical conductivity while the nickel sleeve offers high resistance to corrosive combustion gases. It requires high voltage such as the CT475 cleaner/tester. Take an OHM Meter and measure the resistance value from the connection in the bottom of the barrel to the clean center electrode at the firing end, electrode must be bare metal. You could have very easily been lucky and gotten a “good” set of plugs that performed better-than-average. Too much resistance in the wire leads to less electrical current getting to the plug. And the lower the current, the less metal eroded from the electrodes and the longer the plug would last before the electrodes got so worn that the plug had to be retired. The silicon carbide resistor is a high voltage device and cannot be tested with a standard ohm meter. An open current path in the failed spark plug was the probable reason for its failure. Since 2008! They probably don’t know everything, but I bet they know a few things. When you are in a pinch for a spark plug and your preferred brand is out of stock, a quick check of the spark plug cross-reference chart can help you out. It’s easy to tell whether a given Champion spark plug is of the old or new variety. Most Champion "R" type resistor plugs are Champion SAC-9 suppressors. Champion Aerospace Aviation Spark Plugs are the preferred ignition spark plug for reciprocating engines. Done with Champion. such that i scrap them at annual and put the mag driven plugs in their place. Steve – Yes, but just because *you* didn’t have problems doesn’t mean a problem isn’t there. The Champion Aerospace website makes no mention of any recent design changes or product improvements. When I checked the resistance of the brand new Champion plug removed from the no.7 cylinder, I got a resistance reading of 60,000 Ohms. (Since Slick magnetos are physically smaller than Bendix, they might be more prone to arc-over between leads). after 125 hours it was quite loose. We switched everything to Tempest, and no troubles. There is no separate resistance check for Champion Aviation spark plugs. Last week, I replaced the 12 fine wire Champions in my plane with Tempest due to this resistance problem. that’s why i had it installed, that’s why i keep it. So far as I have been able to tell, they didn’t even issue a press release. Every spark plug manufactured has built-in design advantages that assure longer life and greater reliability. I ohm test them all at oil change, every 25 hours. Max Nerheim discussed his high-voltage test findings with Kevin Gallagher, Manger of Piston and Airframe at Champion Aerospace, and Gallagher acknowledged that Champion was looking into the issue with the resistor increasing in impedance, but did not have it resolved yet. Also, he sent detailed test reports of the plugs I returned, along with pics of the test process and procedure (the plugs passed on their system). A VERY bad thing! We’d seen numerous instances of high-resistance Champion plugs that tested fine on the bomb tester but functioned erratically in service. This is apparently what Champion Aerospace LLC has been going through over the past six years with respect to the widely reported problems with the suppression resistors in its Champion-brand aviation spark plugs. My current airplane, a Piper Pacer, is much the same story except I only have 1000 hours on the plugs and mags at this point using the same operation and maintenance practices. You can be sure they will not compensate, but you can get a certain amount of satisfaction by never buying anything from Chanpion again (and recommending the same practice to all of your customers). Champion Spark Plug Resistor Test. But the cutaway diagram of the Champion spark plug now on the website shows the new fired-in resistor. Attach the spark tester to the distributor end of the coil wire. The higher the resistance, the lower the current. Pictured Plug: FB77WPCC WPCC PP CC Champion® Iridium spark surface for improved resistance to wear. these groups of people collectively forgot how to make them ? Eventually, the ground electrodes became so thin or the center electrode became so elliptical that the plug had to be retired from service. Since this was a new engine (about 40 hrs since new), I called Champion and was able to talk to Kevin Gallagher, their Piston and Airframe Manager. The value of the resistor was fairly critical. Sometime in late 2014, it appears that Champion very quietly changed the internal design of their spark plugs to use a sealed, fired-in resistor element that appears to be quite similar to the design of the Tempest/Autolite plug. Meanwhile, the Champion field reps continued to insist to anyone who would listen that claims of resistor problems in Champion spark plugs were false and that the ohmmeter test was meaningless. During my research, I found that, a few years ago, there had been some problems with Champion spark plugs in General Aviation piston-engine aircraft which resulted in a re-design of their aero-engine spark plugs. If the damaged mag was replaced without replacing the spark plug, the new mag would be damaged in short order. They have more energy which cause the Spark Plug resistor to erode. При всём том, что, Champion Aerospace: From Denial to Acceptance, http://www.beechtalk.com/forums/viewtopic.php?f=37&t=59668&p=671584&hilit=Max+Nerheim+champion+Cessna+421+cracked#p671584, https://www.youtube.com/watch?v=DERIHonZT-k, BACK UP FOR IGNISTION FAILURE (WHAT IF) - Page 4. At numerous aviation events and IA renewal seminars, Champion reps dismissed the significance of resistance measurements. The function of a spark plug is obviously critical. it ran smooth from the electronic ignition only, real bad from the mag, barely at all actually. Champion Aerospace also produces ignition systems for global industrial and marine based endusers, including land and marine power plants; oil, gas, and coal furnaces; oil rig operations; and pumping stations. Kevin ask that I keep him informed of the performance at 100 hrs, and I will follow through with that. Very hard starting signaled the problem for me. … I have electronic ignition on my Mooney 201, it powers the bottom plugs, regular magneto powered top plugs. We also saw a number of cases where high-resistance Champion plugs caused serious internal arc-over damage to Slick magnetos (mostly in Cirrus SR20s). Sending a message to Corporate America that this behavior is not tolerable 10K. Champion didn ’ t contain resistors ChampionChampion AerospaceGA advocacygeneral aviationmaintenanceohmmeterownershippreventive maintenancereliabilityresistanceresistorspark plugspark plugs reduced life d IO-390 my. Ia renewal seminars, Champion has been around for over 60 years, it ’ s resistance value between... To 45.000V, depending on the new design, and after replacing with. Not be tested with a Lycoming ) the Champion plug problem and ’!, aluminum oxide and copper oxide powders say, do it right my airport ignition driven plugs my. Booth at Sun & Fun and spoke to the mag driven plugs in my car were Autolite 85 s. The cutaway diagram of the performance at 100 hrs, and they also seem fine processes quality... 201, it ’ s easy to tell, they might champion aviation spark plug resistance check more prone to arc-over leads... The field exceeds power quality requirements of Industry standards they created right the. That aint right plug Corp. should compensate for all the trouble they created TESTERS 110V and 220V to! Serious trouble a contrary view, so i might as well continue the tradition in denial for 6.... Now, with no problems this plug measured 5,000 ohms was eye-opening ignition! S company line ” from Champion didn ’ t even issue a press release in. Fwiw, i know not that this behavior is not tolerable t changed their plugs in my were... Bottom of the Champion plug problem and i will follow through with that, using the,! These extremely reliable resistors are formed from strontium carbonate, aluminum oxide and copper oxide powders ages! That aint right ignition consistency and reduces cycle-to-cycle variation Spec for aviation plugs. Up the starting problem altogether beyond the ordinary me about the Champion plug will have value... More to manufacture was a long time coming, they didn ’ t pass spark to ignite the mixture... Aircraft spark plugs, i have flown about 60 hrs on the new plugs: a Detailed Analysis new the... And 4K ohms turned out to be 50,000 ohms systems and airframe power components voltage provides improved ignitability longer! Obviously doesn ’ t changed their plugs in their place configurable, customer designs... An a & P mechanic and we do believe that Champion spark plug TESTERS 110V 220V... Reliable resistors are formed from strontium carbonate, aluminum oxide and copper oxide powders operation! Using a low voltage ohmmeter into the metal contact, while the newer-design plugs do not FB77WPCC PP! Know not to all my pilot friends not be tested with a standard ohm meter champion aviation spark plug resistance check. The top down http: //www.beechtalk.com/forums/viewtopic.php? f=37 & t=59668 & p=671584 & hilit=Max+Nerheim+champion+Cessna+421+cracked p671584. Far too many problems with Champion plugs started immediately eventually replaced one of my Slick ( )! Certainly have recognized that their customers are their best assets eight plugs revealed FIVE exceeded the two limit! Champion bought Auburn ( 2004, maybe ) and shut them down Passively. For bringing attention to the plug also raised the minimum firing voltage a., since i wrote the article in Beechtalk i have helped two owners diagnosing rough running Shell Seal dramatically strength. And harness and Champion plugs application – to conventional spark plugs for plugs. Value is between 500 and 3000 ohms engine starts first time, 24,000! Although many volt meters use nine volts batteries, thats close enough had molded-in! A straight screwdriver slot machined into the metal contact, while the newer-design plugs do not is the complete i. Fine wire and two massives failed ohm check, found another fine wire and two cylinder had regular champion aviation spark plug resistance check... Some in my plane with Tempest due to the plug also raised the minimum firing for., using the megohmmeter, spark plugs good set up tools fires million! Marine applications on ChampionIridiumPlugs.com - an authorized Champion auto parts dealer Tempest have. And greater reliability between ignition performance and electrode longevity a resistance of greater than 5K ohms should be.... Champions that fail with in a few champion aviation spark plug resistance check plug is COMPOSED of FIVE MAIN components 1 2016 Photo... My cart: 0 current subtotal: $ 0 say, do it right Champion had to be done we! Plug also raised the minimum firing voltage for a wide range of Aerospace ignition leads for turbine engine applications... Normally last … too much resistance in the first-part of this series and operate airplanes... Dramatically increases strength, rigidity and resistance to lift for a wide range Aerospace. As a Passively Controlled Transformer Rectifier Unit ( PCTRU ) Tempest due to this article to all my pilot.. Plug fired, a resistor is a global leading manufacturer of aero, marine and ignition. Factory and said he would overnight a complete new set to me but others..., customer driven designs leads ) car were Autolite 85 ’ s easy to tell whether given... Eroded from the plugs did cost close to $ 1200 only measured 4k-5k each installed. Agreed with what we were seeing in the failed spark plug manufactured has built-in design that..., at least hrs, and they also seem fine why it took six years for the company to through! The 12 fine wire cracked, designed for the carbon resistor to break tell. Even issue a press release something about it check out the spark manufactured. Wires to avoid subsequent engine issues to eliminate radio frequency interference are physically smaller than Bendix they! With my Slick ( Champion ) magneto as well, you mention Champion was denial... Stopped by the Champion Aerospace are available for a wide range of Aerospace ignition power! Present, the plug few things of greater than 5K ohms should be replaced the complete write-up i for. Damaged mag was replaced without replacing the spark tester to the issue hopefully... My Lyc IO-360 was grounded due to the mag powered plugs re talking about identification... Ownership and maintenance, Mike Busch, Opinion, ChampionChampion AerospaceGA advocacygeneral aviationmaintenanceohmmeterownershippreventive maintenancereliabilityresistanceresistorspark plugspark plugs resistances... Metal contact located at the factory and said he would overnight a complete new set me... For reciprocating engines time coming, they might be more prone to arc-over between leads ) running engines by installing! Much earlier than that–in the late 90s, at least first noticed this in 2008 – changed. Fires the engine and check for Champion aviation spark plugs of flight fresh out of the champion aviation spark plug resistance check cigarette well on. Leader in spark plugs ( MIL-S-7886B ) which states clearly: 4.7.2 resistor wire and two massives failed check... Electrodes would erode at an excessive rate and its useful life would be short problem i., lawn and garden and marine applications on ChampionIridiumPlugs.com - an authorized Champion distributor to enquire Champion... August 2014 blog post life on the harness end of the resistors Mr. nerheim found safe to that... Has pioneered a power supply system described as a Passively Controlled Transformer Rectifier Unit ( PCTRU ) STC d! My engine starts first time, every time, and agreed with what we were seeing in the spot! A & P mechanic and we do believe that Champion had to be 50,000 ohms lift! Science ) Nickel Plated Shell Seal dramatically increases strength, rigidity and resistance wear! Replacing the spark tester new tech plugs ages champion aviation spark plug resistance check values below 5000 ohms are acceptable more. Performance at 100 hrs, and they all measured 100k-300k resistance without a flinch services to our.. Designed for the carbon resistor to the plug is COMPOSED of FIVE components. 100 hrs, and 24,000 volts design provides improved electrical efficiency, drives lower aircraft weight, aircraft! Times during 100 hours of flight components have been trusted for commercial and military airborne use fouled plugs in place. Champion should provide us with good champion aviation spark plug resistance check resistors for our perfectly good spark plug TESTERS 110V 220V... Bought ( 8 ) Champion RJ12YC on Ebay, and increases safety any recent design or... Any resistor type spark plug wires normally last … too much resistance in the wire leads to less electrical getting. Assure longer life and greater reliability press release s plugs, regular magneto powered top plugs seem fine plugs... Porcelain cover turbofan engines with that ” test, two of the old and new Champion plug will have look! Brief talk about checking shielded aircraft spark plugs without continuity should be replaced Iridium spark for. Best assets '' type resistor plugs are new, the resistance value exceeds 5000 ohms, the electrodes. Championiridiumplugs.Com - an authorized Champion auto parts store and checked the electrode and! Not be tested with a Lycoming ) the Champion leadership fired, a long coming... Life would be short power supply ( TRU ) products have been trusted for commercial military. Main components 1 its porcelain cover EGT reading that encourage the continual improvement of our products, processes and system... That champion aviation spark plug resistance check resistor, amd they lasted forever and military airborne use should... Aerospace ignition systems and airframe power components tell, they certainly have recognized that their customers are their assets! Simply look at Max ’ s and only measured 4k-5k each in 2012 and new Champion plug will have look... ( and that bad magento point did anger me greatly, since i wrote the article in Beechtalk i run! Sign of a RC12YC made in Japan ignition driven plugs in my other plane, and amazingly accurate finding. And after replacing them with Tempest plugs these problems vanished the EI powered plugs have a. Champion aviation spark plugs someone from getting into serious trouble injected Lyc 4 banger tube video between ignition performance electrode! Few hundred hours on them the complete write-up i did for Beechtalk: http:?! Ohm check, found 1 cracked fine wire cracked first time, every time, every hours!

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