Comments by "David H" (@DavidHalko) on "Engineering Explained" channel.

  1. The paint on the airship was highly flammable, by the way. During WW2, it took the British some time to figure out how to shoot them down, using a combination of regular & incendiary rounds… watch an EV go up in flames after the lithium battery is pierced, without incendiary rounds.
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  2. Carbon fuels are incredibly energy dense. Hydrogen for grid use makes a lot of sense, since it can be stored for when the sun is on the wrong side of the earth and the wind is not blowing.
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  3. Compressed H2 is what seems to be showing up, I have not seen liquid H2 from this ~20 year old concept. The third world uses compressed natural gas, mass transportation busses increasingly use compressed natural gas… all ICE engines. I honestly think that CNG & Compressed H2 can be used in the first world, as the transition in the third world is increasingly happening.
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  4. Propane tanks, heating to 120F must vent, or be at risk of explosion
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  5. The gain in space for gaseous H2 vs liquid H2 may had a degree of offset by the fewer components and decrease in engine size. For example, a rotary engine is much smaller, and can burn hydrogen just fine.
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  6. They could not make the tanks energy efficient enough, nearly 20 years ago, to hold the temperate down enough, for hydrogen in liquid form. When the tanks heat up, the tank must vent. Liquid propane tanks will vent at 120 degrees F or have the possibility of explosion… hydrogen tanks also have this problem at lower temperatures.
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  7.  @logitech4873  - ICE hybrid cars pollute less than 100% EV’s, depending on what the grid power is using. In the throes world, ICE hybrid pollutes less, every time.
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  8.  @daveinstlouis  - “YOUR politics” By assessing my politics, you just confined my comment! LOL! Well done! ROTFL!
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  9. Less efficient for ground based vehicles
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  10. Amazing Engine!!!
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  11. Run an existing semi with a hydrogen injector, to increase efficiency of diesel combustion, reduce emissions, increase fuel efficiency…. ~$200k vs $500k on fuel savings over 1,000,000 miles. Now, will the cost of the electric truck cost $300k more than a diesel truck, there is no cost benefit at all. Maybe we will be pleasantly surprised to find out an electric truck is not that much more expensive than a diesel truck! Looking forward to finding out!
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  12. Newer H2 systems produce less NOx than existing carbon based fuels… this will continue to improve EV’s merely shift the production of NOx to more open pit mining, battery manufacturing, and energy production facilities
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  13. This was nearly 20 years ago, and they were thinking that gasoline stations were available everywhere, and they could start to introduce H2 filling stations, and over the life expectancy of the car there would eventually be as many H2 as gas stations.
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  14.  @Assimilator1  - there is no conversion cost for a car, a car can run on H2 or Gas, like this car does, and people can just fill up on H2 or gasoline. This is really the proverbial Holy Grail… kind of like a plug in hybrid. Honestly, gasoline will likely never go away in anyone’s lifetime, today. Yard equipment, existing cars, portable generators, etc. The energy density of liquid fuel is amazing. As far as NOx, hydrogen produces fewer than existing combustion engines. H2 is being used in Europe, to inject into existing diesel engines, to reduce NOx emissions, today. NOx can be reduced, over time.
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  15. 11:10 - “goal… entertaining to watch” What about to bring more emphasis to the pilot vs only the engineering? A sport is about human conditioning.
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  16. The battery electric vehicles have the same problem as the organic fuel combustion engine… the battery & fuel are both consumables. After 5-7 years, the battery will be disposed of and need replacing. The gasoline just needs to be replaced faster (weekly). The same way we may run out of oil, we may run out of battery precursors (lithium.) The hydrogen fuel cell becomes the [expensive] consumable with Hydrogen cars (that are not burning/oxidizing hydrogen, which is less efficient.) For sustainability reasons, Hydrogen combustion or Synthetic Fuel combustion is preferred. (100% recyclable & precursors accessible everywhere.) There is nothing to say that Hydrogen or Synthetic Fuel can not be made at someone’s home or in fuel stations, so the transportation issue disappears. Hydrogen or synthetic fuel hold a lot of power per liter, both are effectively limitless, both are 100% recyclable, Both can be transported via existing transportation networks. The loss of efficiency can be overcome with technology, and if not, the sustainability aspect still trumps the others… if for no other reason than to burn in an electric car as a generator driving super capacitors (no batteries needed.).
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  17. The amount of energy held in liquid fuel cars is absolutely amazing! I have 1/5th of the batteries from a Mach-E at my house, enough to run the house for 24 hours. People really don’t understand how much power is in an EV. Where I live, there are tons of apartments, no way to charge EV’s, so now all the spare retain space is being purchased by gasoline stations… not for gasoline, but for the anticipation of EV charging points. These will all be fast chargers. Honestly, for the rich and upper middle class, EV’s are a benefit. For the rest, it is an expensive tax on the poor, and a huge liability to the power grid. Imagine pulling 5x the power needed in a day to keep a home running and sticking into each car, in 20 minutes, multiplied by hundreds of cars along a road leading to multiple apartment complexes… when people are going home and going to work every day… when solar power is not producing much power. This means all this power is all going to be driven by carbon based fuels, to supply peak power demands. This is going to be a nightmare.
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  18.  @jnawk83  - “do this overnight” Read the previous post. In high density apartments, this is impractical… so filling stations with fast chargers 🔌 are buying up all the retail space. Apartment dwellers will not park their cars 🚙 at filling stations overnight “toaster or air conditioner” The car 🚙 will require the same number of KW, charged slow or fast. The number of amps, for the fast charge, is much higher, as you are trying to suggest! An EV is no toaster or AC. Even ovens & AC pause as temperature targets are reached, EV’s suck unbelievable quantities of power, continually, until charged… the power needed is massive! Even charging at slowly at night, with a car taking 5 days of the energy of a home 🏠, and ~2 cars per home, this means an incredible amount of energy is needed at night, when solar panels are not producing energy, this means cars 🚙 are charged using carbon fuels... marginal carbon savings.
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  19. Nearly 20 years ago, this was a reasonable alternative, to end dependence on gasoline, and have time to slowly transition from gasoline to hydrogen. Had this been done 20 years ago, we would likely be off gasoline & diesel today.
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  20. This is definitely my real life problem. With family 12+ Hours in two different directions, hydrocarbons is the only way to make those trips in a single day
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  21.  @danielh4995  - your point is entirely valid. We can domestically produce hydrogen at home, using cheap power, and runout cars on it… or stoves…. If heat our houses…. Or light our fireplaces… or grill… Most efficient way? Not necessarily… but during peak times in places like California, there is so much energy during the day that it is valueless now… so might as well use it!
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  22. Ok — so, if we went to E20 & changed the gearing in the car to leverage the higher torque, could we improve the gas mileage? Similar question… if we have a vehicle which takes E85, can we change the gear ratio to get better gas mileage, since we have more torque?
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  23. 6:00 - “sports cars weighing over 4,000 lbs and I think that’s wrong” EV cars are heavy, are they wrong ?
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  24. “Hydrogen combustion… not worth doing?” He mentioned in the video that there were disadvantages to port based fuel injection, this technology is ~20 years old, and better ways exist as he also said in the video, if the goal is also to get more horsepower out of it. Hydrogen is still likely a superior solution for high torque needs, like fully loaded tractor trailers and goods transportation over mountainous inclines. Since gasoline exists today, this concept car is a great way for regular daily drivers to run on hydrogen, where gasoline can be used for those stations where hydrogen is not yet available. This was a realistic car for a short term transition (maybe 10—20 years) from gasoline to hydrogen, using ~20 year old technology. “Ethanol… carbon neutral fuel” Since ethanol can be created out of CO2 in the atmosphere, plus a little water, this is a great option, as liquid fuel holds a lot of energy in a very condensed space! If the engines are designed to run on ethanol & gasoline, then this is a great transition option! The modern shift to gaseous hydrogen with fuel cells is a notable shift, reducing complexity, as electric components become more readily available, eliminating the battery problem in EV’s. The option of injecting hydrogen into a diesel engine, after filling up your vehicle with diesel & water, with on-vehicle electrolysis, is a great combustion fuel extender… producing less emissions & better mileage on a vehicle.
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  25. Sometimes, these types of videos are counter-productive, turning something helpful into a general gripe session. I am personally well aware of the consequences of lead, after a friend’s child invested lead post home-improvement project on porch with white paint. Griping about lack of centralized regulation, which effectively expanded the lead problem to begin with as you so effectively illustrated, is part of the reason for the problem. Reducing the regulation, so expensive certificates are not needed to make an engine run lead free, is the best option, and allow people to go lead free on their planes. When The Market has a choice to stop poisoning themselves, they will do so, as soon as they can affordably do so, as long as there is not a mind/physical altering addiction involved.
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  26. This car is similar… Can be hydrogen first, gasoline second… no hydrogen filling station around, or it sat around for a year, the gasoline can still be used to keep it going!
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  27.  @ColtonRDean  - “why bother with the hydrogen?” Hydrogen can be made in any nation, Hydrogen can supplement & replace NG, Hydrogen can supplement & replace gasoline & diesel, Hydrogen can take unreliable electricity ⚡️ from Solar 🌞 & wind 💨, store it in compressed gas or liquid or ammonia form, and then release it for energy production during peak usage times to stabilize the grid. Hydrogen based Ammonia can also be used to create plastics, which wind 💨 and solar ☀️ panels have no way of replacing from drilled oil. Hydrogen is inherently portable, not requiring the strip mining & child labor & slave labor used to make large batteries 🪫 needed to make electricity portable, where lithium battery recycling is energy & labor intensive & not really widespread. Hydrogen solves so many renewable energy problems, that solar ☀️ and wind 💨 have not addressed, there will be an abundance of H2 which can also be leveraged for automobile 🚙 & truck 🛻 & train 🚊 & airplane ✈️ usage… today… Until H2 is widespread, gasoline can still be available for the transition, until gasoline is no longer available.
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  28.  @rscott2247  - “one would think” people would be happy with the H2 Toyota Mirai getting 357 or 402 mile ranges (depending on the model)… with refills in under 5 minutes. People always buy inferior products when marketed by the rich & the politicians they buy.
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  29.  @philsmith2444  - no one cares about pressure left, as long as they are getting their miles between fill-ups.
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  30. There are good results with higher efficiency & lower emissions when injecting H2 into diesel engines, as well.
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  31.  @wolu9456  - the H2 can be cracked on the fly, only a small water 💦 tank is required. This is being done today, with diesel engines.
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  32. This sounds like a marvelous vehicle for future military use!
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  33. This is nearly 20 year old technology.
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  34.  @Nico_Dica  - I guess I did not get the joke. Life is still burning sugars for fuel, producing CO2, for time immemorial. Humanity is pretty advanced technology, compared to an amoeba.
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  35.  @EngineeringExplained  - I have not done the math yet, but the higher cost for synthetic fuel might still be cheaper than the cost for the electric car battery & motors and a change of the EV battery (ICE cars seem to run ~200k on the average? And since this is an average, the cost of that third change for some may be a stretch.) Also, the energy & CO2 in lithium battery recycling is hardly ever mentioned, in any numbers.
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  36. There is always the rotary engine… they can burn practically anything & absolutely fun to drive!
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  37.  @paulg3336  - Cobalt is considered a rare earth, with nearly half the earth’s reserves in Democratic Republic of the Congo… where child labor is doing much of the work.
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  38. Sorry  @paulg3336 , Rare Earths are what the industry calls them. The US’s GM just cut their EV forecast because they can’t build enough batteries. Honestly, Copper is getting to that point. It would take the entire world’s output in copper to provide the electrification of cars for a little island like the UK… those cars would last how many years? 12? (Then the world’s output in copper would be needed again? They will not unwind & rewind all the old motors, they are destined for the junk yard!) Oh… there is a whole world out there, which needs to get moved to EV’s? Shoot… that’s a problem! ROTFL! We need as many options, not reliant on rare earths, as possible. It is a poor use of the rare earths when H2 can be used, right now. People have to stop being religious about this stuff and get with the program.
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  39.  @armandsimonis7992  - “a battery for EV’s can be made without any cobalt” But this is not happening for a reason, the energy density of those batteries suck. Gasoline holds an order of magnitude more energy. “Child labor… not used for cobalt used by…” As Sept 2021, of the 255,000 Congolese mining for cobalt, 40,000 are children, some as young as six years. Chinese rechargeable battery industry accounts for around 60% of global cobalt demand… how many of the EV batteries are coming from China? China is not very clear on their supply chain. How about the slave labor being used in China, in East Turkistan, for battery manufacturing? Tibet, a toxic chemical leak from the Ganzizhou Rongda Lithium mine poisoned the local Lichu river, your batteries come from there? (This has been going on since 2005 and still happening!) How about the sink holes forming around the lithium mining in South & Central America? (Sucking brackish water out of aquifers, to evaporate & harvest lithium, and the holes occur.) This dependency on this crap has to go.
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  40.  @armandsimonis7992  - “crude oil… human rights” But most crude oil producers are not using child labor and slaves to produce their product. One should not conflate a nation with private corporations, unless the corporations are owned by the state. “environmental issues” An EV being charged in West Virginia will produce more carbon output than a hybrid vehicle produces. These religious wars over technology need to end, so we can do something good for the environment and good for people.
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  41. “EV being charged in West Virginia will produce more carbon output than a hybrid”  @armandsimonis7992  - “Total nonsense” Absolutely not nonsense. An EV would need to drive between 41,631 miles to 93, 827 miles to just break even on Carbon, assuming clean electricity… the amount of carbon used to mine batteries, ship raw materials, manufacture batteries, ship batteries… it is incredible! If the electricity is being generated from Coal, as it is largely in West Virginia, a hybrid will save more carbon over the lifetime of a car. It is not just West Virginia! Kentucky, Indiana, Missouri, Wyoming, Utah… EV’a create more carbon than Hybrids in each of these states, in addition to West Virginia! Other states, the carbon produced by EV’s are close to equivalent to hybrid cars: Ohio, Wisconsin, North Dakota, Colorado “Enormous amount of energy to refine crude oil” Solar & Wind have a significant dependency Natural Gas, which is also refined, and required in large quantities to compensate for unreliable solar & wind generation, is also included. Heavy producers of electrical energy by Nuclear reduces the carbon load of EV’s, over the lifetime of an EV, but only The South East can benefit from nuclear power expansion approvals by Democrat Obama in the late 2000’s… problem is, that carbon negative calendar for EV’s reset as soon as one of those carbon intensive manufactured lithium batteries must be replaced. If an EV is wrecked before break even, the person might have well been driving a gas car, since it would have taken less global resources, produced less carbon, and cost a lot less in money. New drivers should all be given cheap ICE engine based cars.
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  42. If hydrogen fueling stations were everywhere 20 year later, the car would still work Here we are, nearly 20 years later, and the car still works Not such a bad deal
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  43. This was nearly 20 years ago. Had H2 become popular ~20 years ago, hydrogen filling stations would be everywhere, and these cars would still be usable. Since hydrogen did not take off, these cars are still be usable today, on gasoline. In the end, pretty solid concept.
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  44. “Skip shift” - I do that manually, all the time! LOL!
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  45. The secondary fuel tank is a great way to make sure that the car is usable, when a hydrogen filling station is not available… and also to make sure the car is usable after sitting in an airport parking lot for a week with a business trip. The ~20 year old duel fuel is reasonable, similar to a modern plug in hybrid.
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  46.  @gigabyte2248  - “Battery recycling generally involves…” - discharged Li-ion batteries🪫 are not safe - discharged Li-Ion still combust 🔥 on pierce - Lithium fires 🔥 occur at recycling plants - Toxic fumes result from lithium fires 🔥 - not 100% of toxic recycled Li-Ion batteries 🪫 are recycled, leaving what remains to poison the environment (same issue with solar) “mining fossil fuels” Mining carbon fuels merely re-expose carbon that was formerly in the biosphere, back into it, where it is naturally recycled ♻️ by the carbon cycle. “Scrutinize” Poking a hole 🕳️ and slurping up carbon fuels, which will just leak into the biosphere at some point, anyway, is a huge benefit since leaking methane is less of a warming agent than CO2, and the normal carbon cycle will recycle ♻️ it as plant 🌱 food. Also, some carbon fuel is abiotic, from radioactive decay, and harvested methane for combustion is better for the environment than leaked methane. “Oil wells” They are not going away, since wind 💨 & solar ☀️ don’t produce plastics, flooring, roof shingling, vinyl siding, asphalt roads, etc. “Comfortably ahead” Battery 🔋 electric ⚡️ vehicles 🚗, consuming energy in West Virginia, produce more carbon than gasoline ⛽️ hybrid vehicles (not even taking into consideration the carbon & energy in recycling batteries!) Just thinks about the results in the 3rd world! This being said, H2 seems to be the cleanest alternative, since H2O exists nearly everywhere, salt water 💦 is a ready electrolyte, and consumption of H2 is naturally recycled ♻️ in the water cycle. Of every possible option, batteries 🪫 are the worst, poisoning the water & land & air Carbon based fuel ⛽️ is recycled ♻️ naturally, as plant 🌱 food, which our food 🍱 eats H2, produced by wind 💨 energy cracking salt water 💦, appears to be the least risky to the environment, taking the least amount of energy to recycle ♻️ things. Humans don’t recycle ♻️ well, except for lead acid batteries 🔋, and lead acid batteries🔋 are too heavy for 100% electric vehicles, besides golf cart sized vehicles 🚗
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  47. But can it combust hydrogen, ethanol, and other fuels… I bet this is a way to handle all different kinds of fuels in the rotary engine as a fuel extender!
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  48. “Rich farmers” - watching farmers work from before sun up to after sun down, missing fingers & toes, no one in their right mind would refer to them as “rich”.
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  49. “corn based ethanol and high fructose corn syrup” - these are two different kinds of crops and should not be conflated.
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  50. “Why is corn used when there are better options?” Corn is also used for cereals like corn flakes, feed for animals like cattle, basic long term stored foods like canned corn, flour to make breads for people who are gluten intolerant, etc. When farm equipment & land can be used to create food or energy, it becomes a buffer where a single growing season can be applied to positively energy energy production, for example if a war breaks out (ie Russia invading Ukraine, Iraq invading Kuwait, oil embargo of 1970’s, etc.) Extremely high density liquid energy carriers like alcohol based fuel can be domestically harvested to keep economies of scale operating during difficult times. This is partially a national security issue. Renewable Wind & Solar energy, which is not easily stored & transported, should be applied to make alcohol based fuels, to create a naturally Recyclable energy solution. Batteries are created from strip mining of Africa, will be buried in waste landfills of the US, heavy metals will leech & poison the water systems, while alcohol is created by domestic land use, and those strip mines will deplete elements quickly, while CO2 in the atmosphere will be recycled to make new soil base from plant roots. Would switch grass be better? Sure, but then the question is, can existing farm equipment be used? Can switch grass harvesting equipment be “dual use” for which food stocks? How long will that farm equipment be usable if it remains idle, while switching to a good stock? Corn is a lot like Oil, it is domestic, it is flexible. We can not replace oil with ethanol, not enough land to replace all oil consumed, but it is a carrier to make portable high density energy, that does not result in raping the third world, destroying their environment, making us less dependent upon the racist destruction of Africa, destroy our environment by poisoning our land and water in later years, etc. There is additional value of ethanol in making more portable energy, with fewer very long term consequences & 100% natural recycling which is not dependent upon additional energy & human consumption to perform the recycling. Ethanol is not a panacea, but it is not as ridiculous as the author of this video suggests through his unprofessional mocking and not reviewing the other clear benefits.
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