Comments by "" (@doktorbimmer) on "Donut" channel.

  1. Today marks the 7th anniversary of the end of RX production, on Thursday June 21, 2012 at 4:30pm the final RX-8 car ever to be produced rolled off the assembly line, the last RX model to ever be produced by Mazda.
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  2. R.I.P. "Rust in Peace" Wankel engine... 1964 - 2012
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  3. This week marked the 10 year anniversary of Mazda's board cancelling the RX brand and further development of Wankel engines. The RX brand's bad reputation for unreliability and poor fuel economy saw sales in a steady decline as far back as 1986 with the last two RX model suffering a net loss for the company... it is estimated that the RX-8 lost nearly $3 billion dollars in development, production and warranty costs that bankrupted the company for the third time in its history. As part of the government bailout loan deal Mazda agreed to cancel development of the unprofitable Wankel engine and drop the failing RX brand.
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  4. @Bill Luo While it is a common urban myth that the RX-8 was canceled because of emissions, this is simply not true.. The RX-8 continued to pass the world's toughest emissions standards (EPA Tier2 Bin5 AND the strict California CARB ULEV II right up until lack of sales ended production. Sales of the RX-8 were so low in Europe there was simply no reason to justify re-certifying the RX-8 to meet the Euro5 emissions standards as they would never sell enough units to recoup the costs incurred.
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  5. @John Burns Indeed johnny... money and resources that would not have made any return on their investment. Mazda is a company that needs to develop cars that will actually sell... if not they will cease to exist as a company.
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  6. The salesman at the Mazda dealer didn't scream... he very politely said that Mazda does not make Wankel engines anymore....
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  7. @John Burns The RX-8 MET OR EXCEEDED EPA Tier2 Bin5 AND the strict California CARB ULEV II right up until lack of sales ended production.... it would have easily passed and exceed Euro5 standards...
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  8. The Wankel engine is not a player in the engine manufacturing industry anymore... its an obsolete design because it was inferior to reciprocating technology.
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  9. DR. Wankel had nothing to do with this engine... in fact he hated this engine.
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  10. @John Burns Europe is nearly half a century behind the United States which introduced vehicle emissions standards in the 1960s.
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  11. Skyactiv-G and Skyactiv-X technology requires high static compression Ratios... anyone familiar with Wankel engine should know that this is simply not possible because of the Wankel KKMs seriously flawed and limited combustion chamber geometry, CRs above 12.5:1 cause serious disruption of proper ignition flame propagation and deflageration making the designs poor combustion efficiency issues even worse. Mercedes-Benz exhaustively studied and developed GDI fuel injection systems with the Wankel engine in the late 1960s and found the CRs too low to effectively adapt Stratified Charge Mode Combustion and several other manufactures such as Rolls-Royce, Deutz, Yanmar, MAN, Krupp and John Deere studied Direct injection Stratified Charge operation with the Diesel Cycle and all failed to produces a commercially viable engine for these exact same reasons. Mazda's Skyactiv-X technology utilizes a modified Miller Cycle and variable valve timing in order to actively control Dynamic Compression Ratio something not possible in a fixed port induction design such as the Wankel KKM so any suggestion that Mazda is working on a similar system for the Wankel engine is simply ridiculous and without any technical merit.
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  12. Your baby is rotarded... a tragic genetic birth defect that has finally been eradicated from the automotive industry.
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  13. Unfortunately Felix Wankel's engine design was a complete failure.
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  14. John doesn't understand why Wankel engines are no longer made...
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  15. Certainly is inferior, that is why the Wankel was a commercial failure and has been obsolete in the engine manufacturing industry for many years.
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  16. Followed by the screeching sound of broken apex seal chucks grinding into the housing walls...
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  17. The Wankel engine is dead... its not coming back.
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  18. This month marks the 10 year anniversary of Mazda's board cancelling the RX brand and further development of Wankel engines. The RX brand's bad reputation for unreliability and poor fuel economy saw sales in a steady decline as far back as 1986 with the last two RX model suffering a net loss for the company... it is estimated that the RX-8 lost nearly $3 billion dollars in development, production and warranty costs that bankrupted the company for the third time in its history. As part of the government bailout loan deal Mazda agreed to cancel development of the unprofitable Wankel engine and drop the failing RX brand.
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  19. Mazda doesn't make Wankel engines anymore, this month marks the 10 year anniversary of Mazda's cancellation of the RX brand and further development of production Wankel engines.
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  20. Rest in Peace Wankel engine... 1964 - 2012
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  21. Mazda's cars are turning its drivers gay... if they weren't already!
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  22. There are a lot of false urban myths and misinformation out there that is really disturbing... the Wankel engine is an outdated and obsolete engine that died-out because it simply cannot be adapted to utilize the modern technology that it needs to make it clean, efficient and powerful enough to compete with the vastly super reciprocating engine types mass produced in the millions today.
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  23. @Gewdvibes Please don't pretend to know anything about batteries son... they are heavy, dirty, expensive and horribly inefficient. Fusion will be great some day... IF it ever arrives but it still won't replace internal combustion in some applications. ICEs will be around long after gas and coal are gone... because they don't need fossil fuels.
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  24. Actually he saw a Megola rotary engine motorcycle and saw how the whole engine acted as a flywheel making the engine lighter and run smoother... of course we don't use Felix Wankel's design because it was too complex... Mazda bought Hanns Paschke's and Walter Froede's design which is not a rotary engine at all...
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  25. REST in PEACE Wankel engine... 1964 - 2012
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  26. Audi has won Le Mans 9 times with a Diesel engine.
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  27. +TheKiwisage Mazda is not underrated... its just one of the smallest and least successful Japanese automakers...
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  28. @Gewdvibes You must be smoking crack if you believe that solar and wind can replace internal combustion engines... because everything will come to a sudden halt every night the wind is not blowing! Lol!
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  29. @Gewdvibes No, I'm dead serious kid... there is no technology available that can completely replace internal combustion engines in the automobile industry... anyone that tells you otherwise is clearly not educated enough to speak intelligently on the topic.
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  30. The Wankel engine is dead... never coming back.
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  31. Tesla electric cars are the official car of the LGBTQ community. https://www.youtube.com/watch?v=eLSR_pa6vjk
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  32. Mercedes-Benz unveiled their first HCCI engine 10 years ago... Mazda has built its entire business model around building disposable cars, its what they are famous for!
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  33. The 2.0 liter Skyactiv-X Mazda3 delivers 43.6 mpg on the new European WLTP drive cycle test. No EPA ratings yet but they could be near the 50 MPG mark.
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  34. Mazdas don't last 150,000 miles... what is your point.
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  35. Can you imagine? At one time people actually believed they would replace reciprocating engines...
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  36. The company that invented the Wankel KKM engine was NSU Motorenwerkes GmbH. it was at the time the largest motorcycle builder in Europe... Felix Wankel was a motorcycle fan and rider... he worked at NSUs motorcycle division. Félix Théodore Millet invented the Rotary powered motorcycle in 1892... Felix Wankels favorite bike was a legendary German racing bike company called MEGOLA Wankel copied the Rotary layout for his 50cc NSU supercharger and later his Wankel DKM prototype (a rotary motorcycle engine).
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  37. I salute Mazda for stubbornly remaining the smallest, least successful Japanese automaker...
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  38. Actually Mercedes-Benz unveiled their HCCI engine in a car 10 years ago and Volkswagen and Opel have also been working on the concept for years... the Mazda system relies heavily on HCCI component technology developed by Bosch from these earlier programs... only Mazda is taken the risk of launching an "half step" or intermediate stage version of this technology instead of a true HCCI system... they have chosen to be the Guinea pig.
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  39. @J Clark And engines like the Wankel that had inherently fundamental flaws become obsolete in the manufacturing industry regardless of how people take care of them.
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  40. @Vladimir Lucifer The injectors job is to evaporate the fuel... and evaporation causes COOLING by the absorption of latent heat.
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  41. Mazda was one of several companies that failed to meet the new interpretation of the existing Diesel emissions standards. Mazda Diesels were emitted 6 times the amount allowed and was unable to sell Diesel engines here because of these changes in EPA policy.
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  42. Internal combustion engines are not going anywhere... they are here to stay because there is no available technology to replace them.
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  43. Insert jealous homosexual rotard comments below.
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  44. One thing is for certain, the Wankel engine is dead... and it is never coming back.
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  45. I too immediately thought of Mazda's failed foray into producing cars with the Miller Cycle engine... Its too bad Mazda is better at losing money than making it.
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  46. Mazda lost 3 billion on the RX-8...
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  47. Like reliablity...
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  48. Indeed, the 4-cylinder MX-5 is the best selling sports car under $50,000... THE RX brand however was discontinued do to lack of sales.
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  49. Actually Mazda had been using electronic fuel injection for decades but still had problems... the Wankel suffers from several fundamental flaws that are inherent to its basic geometry that cause poor combustion and typically require more fuel (richer AFR) to prevent it from self-destructing from pre-ignition/detonation and to reduce combustion temperatures to prevent overheating. Modern reciprocating engine have the ability to use ultra high efficiency combustion chamber designs, leaner fuel mixtures and can be optimized for maximum efficiency... the solution for automakers is to abandoned the Wankel in favor of using only reciprocating engines as Mazda and others have done.
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  50. There is no explosion inside any internal combustion engine, the air and fuel mixture deflagerates rapidly but less than supersonic speeds... so no shock waves or directional forces... Pascal's Law dictates the pressure is always exerted equally and evenly in all directions.
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