Comments by "John Burns" (@johnburns4017) on "Engineering Explained" channel.

  1. The Final Eclipse Read my posts.
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  2. The real doktorbimmer Bimmer McBimface, you must stop making things up. Rotaries went zoooooooooooooom!
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  3. The real doktorbimmer Bimmer McBimface, they went .... zoooooooooooooom!
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  4. The real doktorbimmer Bimmer McBimface, you must stop making things up.
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  5. The real doktorbimmer Bimmer McBimface, you must stop making things up.
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  6. The real doktorbimmer Bimmer McBimface, rotary engines are used in many things. Mr McBimface, you must stop making things up.
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  7. Is there a vid on transmission/gear box oils?
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  8. The user The real doktorbimmer Is an astroturfer. https://www.theguardian.com/commentisfree/libertycentral/2010/dec/13/astroturf-libertarians-internet-democracy
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  9. RX-Vision being introduced in 2017. All sorted.
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  10. The real doktorbimmer Get therapy Knobhead.
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  11. Pablo Ricardo de Tarragon Correct. The current idea is to preheat the fuel and use spark laser ignition. A low revving rotary using HFO will last and last. Darpa are very interested funding R&D. When the US government funds something the R&D info goes silent. They also fund Liquid Piston who have a rotary in reverse. The seals are in the housing and valves in the roter. Promising.
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  12. Pablo Ricardo de Tarragon Laser ign can project FOUR sparks deeps inside a combustion chamber, which is ideal for a rotary with its moving combustion chamber. NATO want to standardise on fuel HFO. It can be spark ignited by preheating it. Rotaries in R&D have excellent thermal efficiencies when run at constant speeds. Those 4 deck high Wartsila Suzler engines when needing overhauling means the ship is dock, which means down time which costs. Ship and moreso cruise ship operators do as much maintenance as possible under way. They even paint the sides of the ship when in a calling port. They want the ship in dock only for essential dry dock maintenance like azipods, props or the keel. Some ship's designers are looking ahead and favouring larger rotary engines in banks (slide out modules say 1.5 metre by 1.5 metre complete with generator) in cruise ships. Rotaries are one third of the size and weight for the same power output. The smoothness is a great asset in passenger accommodation. Rotaries scale up seamlessly. The rotary genset modules can be phased in, in stages to what the ship's demand is, rather than running these massive Sultzer engines when there is low demand. Then they can slide out a genset module in port and slide one in, which will take a few hours. The genset module in port can be overhauled onshore and the ship continues with no down time maximising efficiencies. These big diesel engines are also filthy. Such huge ships emit as many air pollutants as five million cars going the same distance. "Southampton, which has Britain’s second largest container port and is Europe’s busiest cruise terminal, is one of nine UK cities cited by the World Health Organisation as breaching air quality guidelines even though it has little manufacturing." http://www.theguardian.com/environment/2016/may/21/the-worlds-largest-cruise-ship-and-its-supersized-pollution-problem Some companies are running the cruise ships on LPG to reduce pollution. Rotaries as constant speed gensets are also very good at burning hydrogen. The thermal efficiency of these diesels is because they run at constant speeds. Car engines do not, so efficiency is very low with cars. You are right, in a rational world petrol engines are obsolete and electric is the way. The best range extenders for cars are rotaries with the new R&D very promising superior performance over piston/crank engines. They can be easily hidden in cars being one third of the size and weight, which is a fantastic attribute. Also, as range-extenders are part time engines the efficiency is not a great point - as they will be rarely used. Size weight and smoothness matters. But at a constant speed a rotary with the new advances running as its 'sweet spot' exceeds piston/crank engines. The rotary does not like being revved up and down. Rotaries do not have sealing problems that is myth from 50 years ago.
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  13. Pablo Ricardo de Tarragon 42 years ago is a LONG time. Things have changed since then. I told you it's been taken up again. In the 1970s RR were strapped for cash because they signed a fixed price for the development of the RB211 jet engine. Great engine but sent them into financial problems. They pulled the plug on all projects. Rotary engines are efficient by nature when run at a constant speed at their 'sweet spot'. FIVE companies in the world make them. They are used in UAVs. Look up what Mazda is doing for future road vehicles. LPG is not unsafe. On a ship, the weight and size of the engines is a big problem as the centre of gravity is high. They are 4 decks high. A collection of genset modules all along the keel gives a superior lower centre of gravity. I know ships are more efficient than trucks, but they still heavily pollute using inefficient engines, burning filthy fuel. The best lithium battery per kg energy density holds 50 times less energy than a the equiv petrol. So 50kg of petrol would need 250kg of battery. But road engines are only about 20% efficient, so the equiv really is 50kg of battery. As an auxiliary range-extender on hybrid cars a constant speed rotary cannot be beaten when the new advances are incorporated. The one third of the weight and size is a massive attraction for a part time engine. Something you can't seem to understand.
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  14. Pablo Ricardo de Tarragon LPG is not unsafe. It may be problematic in certain failure conditions. But the failure conditions can be accounted for with safety mechanism put in place. In the early days of petrol there was explosions and fires all over. Heavy fuel oil only caught on because of reduced insurance costs. Now we know how to store, transport and use petrol. Cruise ships, and other ships, ARE using LPG right now. It is a hell of a lot cleaner and stops people preventing them entering places like Venice on pollution grounds. Look at this article about the burning of heavy oil by large cruise ships. It is a big problem. http://www.theguardian.com/environment/2016/may/21/the-worlds-largest-cruise-ship-and-its-supersized-pollution-problem Ships designers are looking at dispensing with those old huge diesel engines and going over to phased in genset modules for reasons I have already outlined. Reducing downtime, and maintenance costs on a cruiser most than offsets higher fuel costs, if there is any. As to road vehicles, the market has to go over to series-hybrids driven by high efficiency electric motors. Small to average sized cars can have a Lith battery bank that will give 300 miles range. The part time range-extender has to be 'physically small' to fit in the car, and smooth. That is where the rotary comes in. Forget the tripe about seals lasting a few years. A modern rotary using the latest advances used as a constant speed genset will last and last. Many go way over 100,000 miles. As as range-extender it is only a part time engine it will last the life of the car. Rotaries do not like to be revved up and down. Fuel economy and emissions suffer. When they are they did have seal lift off as one chamber can have more pressure than the adjacent chamber (although this has been rectified by some makers). Running them at a constant speed just above the seal lift off speed solves a lot. Rotaries suffered though unburnt fuel in the exhaust. Multi-point lazer ign solves that. Designed to run a constant speed then the design is much easier to maximise fuel economy and give superior emissions as most is a constant. Mazda are R&Ding a rotary engine now. They say it will be out next year for the 50th year of the Cosmo, their first rotary car. UAVs use rotaries because of their small size and light weight which is a great advantage in a plane.
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  15. Pablo Ricardo de Tarragon Another nut.
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  16. Pablo Ricardo de Tarragon how is it going fixing the outboards?
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  17. 177SCmaro You must understand that Bimmer McBimface is a mental case.
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  18. 177SCmaro My God! Another nut!
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  19. *****  You must understand that Bimmer McBimface is not all with us.
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  20. The real doktorbimmer Bimmer McBimface, the Wankel is under R&D right now. You have been told that but your condition overcomes you. Sad? Of course.
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  21. ***** Lots of people flew in powered flight before the Wright Brother. The Wright Brothers perfected the controlled landing, no more.
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  22. ***** "The issue with reciprocating engines, and why they need to die a horrible death, is their complexity." It is the pumping losses. So much is taken from the one power stroke to operate the three other strokes that it needs a flywheel to force the piston back up. Anything with a crankshaft has to be inefficient by its nature.
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  23. ***** " Lithium supplies will not support the massive demand that will come from a growing population," Lithium is everywhere. The University of California estimated reserves of lithium would give battery production for EVs as an estimated 1 billion 40 kWh Li-on batteries could be built with current reserves.
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  24. 177SCmaro That is known lithium reserves. The life expectancy of people is going up because of clean water proper food and modern medical Many people suffer through their lives because of air pollution.
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  25. 177SCmaro They owe it to energy, not petroleum, which is only one form of energy.
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  26. 177SCmaro Only since WW2 did oil become the prime source of energy, as before it was coal. Even in the USA today most electricity comes from coal. Germnay had little oil in WW2. Their industry and transport ran on coal - electric trams and steam engines. Oh and horses. Nearly a million horses invaded the USSR
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  27. ***** "He is refusing the accept the points we make." People have to accept your point if though they may be suspect? mmmmm
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  28. The real doktorbimmer Bimmer McBimface, you must stop making things up. You must.
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  29. The real doktorbimmer Bimmer McBimface, you have been given new designs that have been developed since 2008. Were the voices screaming this morning?
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  30. +FRANK101101101 Fuel economy is excellent when used in a constant speed genset application.
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  31. Mark The apex seal problem was solved nearly 50 years ago. 
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  32. Mark ....and? How many other types of cars were towed in as well?
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  33. Mark Oh for Gods sake!  Rotaries are well alive. Five makers in the world make them!
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  34. +Hydrogen Sh You need to understand the difference between mineral and synthetic oils.
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  35. Hydrogen Sh Read my other post on this.  If you are saying there is no difference in mineral and fully synthetic then ...well.....
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  36. Joe User Lubrication qualities of "fully synthetic" are just vastly superior, irrespective of your experiences with poorer quality oil. Only fully synthetics reach API SN. SN is the highest protection. In parts of the European Union it if difficult to find a 100% mineral oil. Most makers stipulate a semi-synth as minimum.  Take note of what I write and apply. Fully synthetic oil is NOT expensive.   My comment still applies.... "Do not go on old wives tales and the comments here is full of them."
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  37. Joe User The best protection API is only met by fully synthetics. That says it all. No one who knows anything about oil uses mineral oil. Go into any store in the UK or Germany and you will not see mineral oils on the shelves.
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  38. Joe User I really do know what I am on about.
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  39. +Eric Trimmer They are simple, very simple.
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  40. Rasta Lion The thermal efficiency is clearly getting better. Laser and HCCI ign offers superior efficiencies. As you say, the heat will not increase as efficiency rises.
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  41. Mazda are hoping to have HCCI in a rotary which will greatly advance this small light unit. Mazda are hoping to use the rotary as a range -extender. As these run at a constant speed the implementation of HCCI is much easier. Toyota have teamed up with Mazda on this.
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  42. The real doktorbimmer Bimmer McBimface, you must stop making things up.
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  43. The real doktorbimmer Bimmer McBimface, you must stop making things up.
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  44. The real doktorbimmer Bimmer McBimface, you must stop making things up.
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  45. The real doktorbimmer Bimmer McBimface, are the voices louder today.
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  46. The real doktorbimmer Bimmer McBimface, are the voices even louder today. Do they scream?
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  47. Bimmer McBimface, you must stop making things up.
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  48. Mercedes bought Ilmor in England who made their F1 engines and called it Mercedes AMG High Performance Powertrains. They still do it all in England. Ilmor were doing R&D on HCCI.
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  49. Bimmer McBimface,..... definition... obsolete ˈɒbsəliːt/Submit adjective 1. no longer produced or used; out of date. The rotary is produced and used.
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  50. The real doktorbimmer Bimmer McBimface, the rotary is made by many makers.
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