Comments by "John Burns" (@johnburns4017) on "See Thru Rotary Engine in Slow Motion - (Wankel Engine) 4K" video.

  1. wheelitzr2 How myths are perpetuated. The apex seals were solved 50 years ago.
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  2. Unfortunately doktorbimmer is infesting the comments of this video. He hates rotary engines. He found his girl friend being fucked in an RX7. A sad case. He has never been the same since.
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  3. doktorbimmer Bimmer I see you getting worse. Sad.
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  4.  @doktorbimmer  Again madman, SPCCI solves running rotaries using gasoline. Using Hydrogen, rotaries get 100% combustion and 23% greater efficiency.
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  5.  @doktorbimmer  Madman, Mazda are not the only makers of rotaries. But hydrogen trains are here, so the hydrogen economy will expand.
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  6.  @doktorbimmer  You are a total madman.
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  7. Mazda have done promising research on HCCI ignition (no spark plug) for its SkyActiv-R rotary engine project using research from its SkyActive 2 program. They have removed the need to locate the spark plug outside the combustion chamber to allow the rotor to sweep past. Mazda solved this in the SkyActiv-R rotary project. Rotaries generally have high compression ratios giving the design easy adoption of homogeneous charge compression ignition (HCCI). Mazda are also looking at laser and HCCI ignition. The aim is to burn all the fuel in the moving combustion chamber, as currently some ends up in the exhaust. Fuel consumption will match piston engines and when used as a constant speed generator as in a hybrid will outperform piston engines with all the advantages of low weight, small size, super-smooth, simplicity, etc. The expectation will be that the engine will be introduced in 2020, the 100th anniversary of Mazda. Looking good. Rotaries are better suited to constant speed, high efficiency genset applications rather than direct drive via gearboxes, running at a 'constant speed' turning a generator - at its most efficient sweet spot. In that application piston engines cannot compete. Rotaries are better suited for series-hybrid cars being much superior than piston engines in size, smoothness and weight. As a range-extender the engine is only a part time engine. The engine performs very, very well in fuel consumption and emissions running at a 'constant speed' turning a generator - at its most efficient "sweet spot". Wankels lose efficiency dramatically when they are revved up and down as when directly driving a car. All these positive attributes combine to make a superb range extender, when the wheels are turned by electric motors. If a car is plugged in each night and uses grid power to run most of the time, then wear on these units will be negligible. As the engine is only periodically used, the life of the engine is greatly extended. Also newer metallurgic techniques are being used to make the engines. Even when electric batteries are depleted, the Wankel can provide enough electricity to power the car and still be economical. The first ever series-hybrid plane flew in June 2013 - using a Wankel engine because of its small size and light weight, and an electric prop. The makers say it can be scaled up to around a 100-150 seater plane. The Wankel engine(s) can be in the fuselage for better weight distribution with small electric motors on the wings giving lighter, and cheaper, wings. The planes could take off and land on batteries only in urban areas to reduce noise and pollution. About 5 companies still make Wankel engines for special purposes such as drones. The great thing about a series-hybrid is that the generating engine works totally independent of the demands of the electric driving motor, enabling maximum efficiency when running. This means the generating engines can be greatly downsized. The battery acts as an energy buffer to give acceleration boosts. The sooner they are introduced in road vehicles in series-hybrid form the better. The Wankel has finally met its niche.
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  8. doktorbimmer Mazda are doing R&D right now. Bimmer how is the therapy going?
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  9. doktorbimmer Five companies in this world make rotaries.
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  10. Bimmer please stop making things up.
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  11. Bimmer you stop making things up.
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  12. SPCCI ign invented by Mazda gives complete combustion.
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  13.  @doktorbimmer  You are a total madman.
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  14. see wiki.
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  15. In a rotary engine the explosive charge attempts to push the rotor backwards as well as forwards. That is why the shape of the indentation in the rotor, a part of the combustion chamber, is critical to ensure the explosive charge pushes forwards rather than backwards. In the past much of the shape of the combustion chamber in the rotor left a lot to be desired. There will always be some backforce, it is a matter of minimalising it.
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  16. Bimmer, How is the therapy going?
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  17. doktorbimmer Bimmer, you really must keep up the medication.
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