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

  1. The rotary engine has been obsolete since the 1930's like the Wankel engine it could no long compete against current engine Otto and Diesel engines.
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  2. @18CRFHONDA11 —HellcatGaming62 That's OK... John doesn't know anything about emissions either... he just a crackpot that thinks the Wankel will make a comeback... Lol!!!
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  3. @Quincy Gaming You can't make the Wankel better than reciprocating engines... its why all the engine manufacturers (including Mazda) have abandoned the obsolete design.
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  4. "Since when?" Since Rudolf Diesel proved that it was in 1898.
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  5. No, the Wankel engine cannot be adapted to HCCI technology because it lacks the ability to have high swirl, "Quench" type combustion chambers, high static compression ratios or variable valve timing. Wankel engines are obsolete and no longer commercially viable in the engine manufacturing industry... they are a relic of the past.
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  6. Mazda is now taking orders for the new Skyaciv-X 2.0 liter 4-cylinder equipped Mazda3 models with delivery for September 2019. https://europe.autonews.com/automakers/mazda-opens-orders-mazda3-fuel-saving-skyactiv-x-tech
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  7. The Wankel engine has some very serious inherent flaws in its basic design that simply cannot be overcome... the unique geometry that makes it possible to run in the first place also restricts is ability to adapt more efficiency that would allow it to compete with other internal combustion designs. One of the biggest problems is the Wankel engines low compression ratio and its poorly shaped combustion chamber... these flaws cannot be changed.
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  8. Yes, The Wankel KKM engines functions using the exact same operating principle as the Otto Cycle engine.
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  9. But how will you get the change in volume for intake, compression, power and exhaust cycles??? The piston/rotor has to reciprocate to achieve the change in swept volume.
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  10. Mazda stopped making Wankel engines 7 years ago.
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  11. +blyndrotor THAT'S RIGHT! the Mazda RX is the most popular car among people that know absolutely NOTHING about cars or racing.
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  12. Wankel engines were a commercial failure and are obsolete because they simply cannot compete with the vastly superior performance and reliability of reciprocating engines.
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  13. Mazda is still in business today... but only because they make cars exclusively with reciprocating engines now.
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  14. +blyndrotor The truth always bears repeating... and the facts are irrefutable.
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  15. Mazda discontinued Wankel engine production in June 2012... attacking the messenger is not going to bring the Wankel engine back...
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  16. Just the facts here kid... why does the truth anger you so much? if you have accepted the fact that the Wankel engine is obsolete because it was an inferior internal combustion engines design concept.
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  17. You certainly are bitter... and definitely in a very deep state of denial, the Wankel engine is no longer developed or produced by any of the original 26 Wankel KKM licensee's (including Mazda) and no longer in series production anywhere in the world... it is an evolutionary dead-end that is no longer able to compete against the vastly superior reciprocating Otto and Diesel engines... which the only thing Mazda makes now. Nostalgia is a seductive liar, you are simply refusing to accept the truth.
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  18. @Vinny V Just the facts here vinny... look up the definition of trolling... you will find that in fact you are the one trolling here.
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  19. @Vinny V Childish insults won't prove your point (if you had one) and don't make you look smarter either... Cheers!
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  20. @Vinny V Have you been by your local Mazda dealer lately? If you haven't? Be sure to ask a salesperson to see a 2019 RX model... Lol!!!!
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  21. Rust in peace Wankel engine 1964 - 2012
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  22. @Quill Maurer No civil or commercial aircraft manufacturer has ever sold a plane with a Wankel engine... this is because manned-aircraft engines must past extremely strict reliability tests. There has never been a successful Wankel engine that is FAA or EASA airworthiness certified.
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  23. @Quill Maurer That is an interesting theory he offered, but its nothing but wishful thinking. The Wankel engine was extensively and exhaustively developed by 26 of the world's largest and best engine manufacturers and over 100 of the best universities and research institutes (Like NASA and MIT) spent decades, millions of man hours and billions of dollar developing the Wankel engine design. Mercedes-Benz and and General Motors for example both spent over 100 million dollars a year on Wankel research and development, additionally: Ford Toyota Porsche Rolls-Royce Nissan Alfa Romeo American Motors (AMC) Citroën Suzuki Yamaha Kawasaki BSA Norton Hercules John Deere Ingersoll and Rand Fichtel & Sachs AG Yanmar Diesel Co. Ltd Daimler-Benz AG Deutz AG. MAN AG KRUPP AG IFA VEB Graupner Savkel Curtiss-Wright OMC Wankel-NSU which became Audi.. and dozens of subsidiary companies and and partnership companies which combined represent billions of dollars in research and development besides just tiny little Mazda.
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  24. PREMIX IN> APEX SEALS OUT>
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  25. Wow! premixing is a stupid, totally false urban myth. You have to be very dumb to premix.
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  26. +Tom Lake Charles I own several Rotary engines including a Uberursel UR-II, Le Rhône 9J and a Gnome et Rhône Monosoupape 9.... but I don't understand what that has to do with this conversation...
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  27. Well, if the Wankel engine offered any benefits? they would not have become completely obsolete in the engine manufacturing industry... this design could no longer compete with the other successful internal combustion designs still being mass produced in the millions.
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  28. Mazda 4-Cylinder Skyactiv-X Vision Coupe stuns at the 2017 Tokyo Motor Show https://driving.ca/auto-shows/tokyo-motor-show/mazda-vision-coupe-stuns-at-the-2017-tokyo-motor-show
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  29. Mazda stated that BSFC (Carnot thermal fuel efficiency) should be in the 50% range... which if your not familiar with engineering terminology would make more efficient than the most efficient automotive Diesel engines currently available.
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  30. BMW is a brand you buy when you want a better car.
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  31. Mazda, the smallest and least successful of all the Japanese auto makers... more famous for its colossal failures than it short history producing automobiles.
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  32. BMWs market share is not under any threat from Mazda who has survived by selling cheap, little entry level cars targeted at first time car buyers...I'm sorry if your lower economic status makes you feel inferior... its your lack of education that seems to be holding you back.
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  33. And you should recall Ford did not need a bailout... Ford bought Mazda in a court ordered bankruptcy sale after it went bankrupt in the mid 70's. Mazda bought back shares with bailout money from the Japanese Government and 3 major banks to prevent the company from going under.
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  34. BMW was building cutting edge aircraft engines long before Mazda was even making corks and bottle caps, long regarded as was on the finest engine manufacturers in the world it developed the first jet engine for military fighter jet aircraft and its designs are still produced and in service in supersonic jet fighters... Mazda has attempted several times to break into the luxury/ high-end performance automobile market but the Eunos, Amati and ɛ̃fini brand were all huge failures and have been discontinued.
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  35. +David Schwartz If you have ever lived and driven in Germany? You will quickly understand the different automobile design philosophy... in the States, cars are basically only taxed on sale price and fuel costs are relative low, (just like the quality of the roads here is low) You can't drive across two states here in 2 1/2 hours cruising at 120mph (unless you want to get arrested) High performance cars there are built to an altogether different set of standards and some people prefer this type of car not just for status.
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  36. @J Clark The Wankel KKM design was plagued by several very serious flaws in its basic design that caused it to be less reliable than reciprocating engines, most notably is its; -Highly compromised combustion chamber design. -Its very poor internal geometry which is inherently limited. -Terrible thermodynamic efficiency which causes higher operating temperatures. -and its very weak, fragile sealing system.
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  37. @Troy Bush Well, Audi won the Le Mans 24 hours NINE TIMES!!! with a Diesel engine and Diesels are the most efficient, practical heat engines available for motor vehicles... even huge container ships. Wankel engines??? They have been obsolete for years now, not even Mazda sells them anymore.
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  38. @Mr kool Aid Man Troy Bush stop pretending to be something/someone you are not... you are not fooling anyone here, especially not me.
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  39. The future will embrace HCCI technology... Mazda is not alone, Mercedes-Benz, Volkswagen and General Motors are all developing new, super high efficiency HCCI internal combustion engines that will power the cars of the future to 2050 and beyond.
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  40. Its all moot is what it is... the Wankel engine was a dead-end design and is no longer used in engine manufacturing.... obsolete technology.
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  41. True, I find obsolete technology like the Wankel engine fascinating... and an excellent example for future generations of how not to build engines.
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  42. True, and that is exactly why the Wankel is obsolete now.
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  43. @Vladimir Lucifer You clearly do not understand the concept of Latent Heat. When pressure drops the expansion causes the gas to ABSORB ENERGY and thus causing the COOLING EFFECT that is always observed.
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  44. Despite all the unsubstantiated blogsite rumors and bizarre comments from disgruntled Mazda employees... its no secret that Mazda is no longer in development of any new production Wankel engine... Mazda's board of directors voted in May 2009 to cancel all further development of commercial production engines and ordered all production to cease by 2013.... The very last series production engine was assembled on June 21st. 2012. The RX engine assembly facility at Ujina #2 was dismantled in late 2013 to make way for a new Skyactiv-G reciprocating engine plant. Mazda has not revealed any new engine prototypes in 10 years and they have not unveiled any new production engine in 23 years... if you think Mazda is going to bring them back? You are very naive.
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  45. None of the UAVs in current U.S. military service use a Wankel engine. Lockheed Martin Stalker battery-electric motor RQ-170 General Electric TF34 turbofan RQ-21 Blackjack 2-cylinder horizontally-opposed 4-stroke RQ-20 Puma battery-electric motor AAI Aerosonde Lycoming-Enya single cylinder 4-stroke Wasp III electric motor RQ-11 Raven Aveox 27/26/7-AV electric motor CQ-10A SnowGoose Rotax 914 piston engine MQ-9 Reaper Honeywell TPE331-10 turboprop MQ-8 Fire Scout Allison Model 250 turbshaft RQ-4 Global Hawk Allison AE 3007 turbofan MQ-1 Gray Eagle Thielert/Mercedes OM668 4-cylinder turbocharged 4-stroke Diesel MQ-1 Predator Rotax 914F turbocharged four-cylinder engine
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  46. You mean Wankel right? The very few Rotary engines left are in museums.
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  47. You mean Wankel right? The very few Rotary engines left are in museums.
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  48. Good comment, although I have to add that renewable alternative fuels will not run out... so ICEs are not going anywhere.
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  49. Mazda discontinued these unreliable engines years ago, production ended 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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  50. R.I.P. Rest in Peace Wankel engine 1964 - 2012
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