Comments by "John Burns" (@johnburns4017) on "Mazda Brought Back The Rotary Engine!" video.

  1.  @stuarthart3370  The Coventry Climax's longevity never mattered, only its performance. Fire Brigades would stomach the higher maintenence costs to get the performance instantly.
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  2. Read Jason's pinned post at the top.
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  3. It is not complicated.
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  4. A nice way of saying I do not understand it.
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  5. Nope.
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  6. The BMW range extender was a poor adapted motor cycle engine. And quite big.
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  7. Rotary engines operate 25% more efficiently when fuel by hydrogen. Japan is moving to a hydrogen society. They have in operation a nuclear nitrogen gas cooled reactor, that the high temperatures produce hydrogen economically. Expect to see hydrogen powered vehicles in Japan, with many having rotaries onboard.
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  8. Jason makes it clear on the operating conditions it is being used.
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  9. Having a motor to increase and decrease the engines revs to vary the inlet timing is very clever. BTW, overall the total ICE engine and EV motor is not complex at all.
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  10. A hydrogen/air mixture is faster to ignite. It has a faster-burning rate than gasoline. Unlike a gasoline/air mixture, all the hydrogen fuel is burnt improving efficiency and fuel consumption. Hydrogen operation improves thermal efficiency by 23% over gasoline fuel operation.
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  11. No need. This is an interim until solid state battery technology renders the ICE totally obsolete.
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  12. You know little of rotary engines. You also never understood the vid.
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  13. They are promising. And simpler.
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  14. You do not understand how rotaries work. They are very efficient when designed to run at a constant speed. Or a narrow speed range. Poor when revved up and down constantly.
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  15.  @freeemailssuck6848  They are not suited for up and down revving.
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  16.  @freeemailssuck6848  So using them in direct drive they are inefficient. Get it?
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  17. With two rotors no problem. But these will never drive wheels directly.
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  18. That was FIFTY years ago!
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  19. Mazda worked with Toyota on this engine. Toyota is committed to hydrogen, as is Japan. Rotaries are 25% more efficient when running on hydrogen. Expect to see this engine in a Toyota.
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  20. The Wankel has 4 stages to its cycle.
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  21. What a silly post.
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  22. The rotary is one third lighter and smaller than piston engines. It is also much smoother. Fantastic advantages in a vehicle that has a to carry around its own heavy propulsion unit. The rotary in the MX-30 is a part time engine. So size and weight matters a lot.
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  23. You never understood the video. The Rotary is used in many applications. Look away from cars.
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  24. ​ @one-eyedsam2186  you wrote: the rotary engine is a failed design. it is not as it is used in aircraft, etc. And now a wheeled vehicle.
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  25.  @one-eyedsam2186  Again ... You wrote: the rotary engine is a failed design. it is not as it is used in aircraft, etc. And now a wheeled vehicle. A failed design is not used. Get it?
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  26.  @simonm1447  You never understood the video. The rotary operates very efficiently when running in a narrow speed band or a constant speed.
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  27.  @one-eyedsam2186  It is not a personal definition. The personal definition is on your part. An engine that is used for many applications is not failed.
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  28.  @one-eyedsam2186  Not my definition at all. It is about FACT.
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  29.  @simonm1447  It is lighters so more efficient on EV. Which is most of the time. It is a part time engine. Sharpen up.
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  30. ​ @nomayor1  Mazda made rotary engines from 1964 until 2012.
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  31.  @nomayor1  I know.
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  32. Read Jason's pinned post at the top.
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  33. Fuel consumption is comparable to piston engines so I have read. But it is very smooth, light and small. So, when running on battery power alone, there is less weight to pull improving fuel consumption to a heavy piston engined series hybrid when running from the battery alone. Excellent advantage. Being only a part time engine, the fuel consumption is not that important as rarely will the car be used using the petrol rotary engine opposed to running off the battery. Typical overall annual fuel running costs, electricity and gasoline purchased, is what matters
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