What else goes into building a jet engine? - Part 4 Final
2024 ж. 9 Мам.
34 731 Рет қаралды
This is part four (the last part) of a follow up video series on our recent turbojet engine test seen in our previous video - • WHAT ELSE CAN A JET EN...
Part three:
• What else goes into bu...
Check out our jet engine playlist:
• Jet Engines
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/ techingredients
www.techingredients.com/
I don't often leave comments on KZhead, but I wanted to thank you and your sons for the truly excellent videos you have been producing over the years. This channel is a genuine gem, along with Applied Science, Breaking Taps, MarcoReps, The Signal Path... Thanks again, and please keep up the great work.
Thanks!
👃
You forgot the absolute gem that is Robert Murray smith
You should always comment. That is a very important metric that youtube uses. If you support a channel even a bad comment is better than no comment, lol. Feed that algorithm.
@@TechIngredients VIDEO SUGGESTION- Build a good home freeze dryer. The ones you can buy are crazy expensive. The only ones built on youtube have cold traps of dry ice and alcohol that need constant tending and unrealistic usage, fumes, explosion risk, ongoing cost, low volume/high power consumption. PLEASE show us the way master!!
Taking advantage of phase angle firing to trigger at the apex of the wave form, using a 20 dollar dimmer switch, is brilliant. Thanks for the outstanding content.
"Don't try this at home", "you can do this yourself, it's a lot of fun" I love this channel.
He means "try it in your friends home ..." just in case .... lololol
do this yourself, just not at home
Our world needs more people as smart as you
13:30 The capacitor in that circuit is absolutely necessary. Automotive coils like those are designed for 12v to be pulsed across its primary winding by an igniter for a few milliseconds (called the dwell time), if the capacitor wasn't there the primary winding would be subject to much higher voltages/currents for much longer periods of time. The capacitor in this instance is working to limit the total amount of charge that can pass through the primary winding in any given 180 degrees of the input. Still a very good build overall, pretty impressive.
Thanks. Not to higher voltages or currents, but to much longer durations.
This has been an amazing series. I know you probably have no shortage of ideas for future videos, but some things I would love to explore with the help of some of your sage advice: plasma actuators (for aerodynamic control with no moving parts), railguns, perovskite solar cells, supercritical CO2 (and its applications), and all of the different types of electric motors.
Thanks!
@@TechIngredients all of these, also you were doing some really cool stuff with permanent magnets a while back that I'd like to get back to. Halbach array?
@@TechIngredients VIDEO SUGGESTION- Build a good home freeze dryer. The ones you can buy are crazy expensive. The only ones built on youtube have cold traps of dry ice and alcohol that need constant tending and unrealistic usage, fumes, explosion risk, ongoing cost, low volume/high power consumption. PLEASE show us the way master!!
Thanks for providing the seriously important STEM knowledge you have! So much knowledge, so little time.
Like all your other content, you keep on delivering. Thank you for the inspiration and teaching. Lost track of how many young people I've encouraged to subscribe. Keep it up!!
Thanks!
It's been a pretty crappy day here. This video was a high point. Thanks for your videos, Tech Ingredients.
You Guys NEVER disappoint! Thanks for your fantastic effort, meticulous detail and very interesting content 🙂
Thank you so much for the information regarding your spark ignition setup. This is incredibly informative.
By far my favorite tech channel. Your explanations are thorough and interesting. Great job!!
Thanks!
I love your channel. This stuff just amazes me. You guys create great content.
Great as usual. I like how you explained the starter by contrasting the alternatives. I was just rewatching your hydrogen oxygen bubbles video which indeed brought a smile to my face. And now picking up again with this video I feel back in business.
Really love this Jet engine series, pls continue with the double (in series) turbo charger plan you talked about a while back.
Great series, excellent explanation and demonstrations ! Thanks TI
Another amazing in-depth video!
Thank you for sharing your knowledge
When most teens, tweens or even adults seem to care only about streaming entertainment, games or consuming instead of DOING something, this channel is such a relief! The channel itself and the comments are a spark of hope that we as a species may not doomed after all - at least on the very short term. Thank you and wishing the channel all the success it really deserves.
Thank you!
Awesome videos! Thanks for all your content 🙏
such an underratted channel. I really enjoyed the content!
GREAT Final episode Tech Ingredients!!!
I would probably never build anything you do videos on. I just love the science you put out there ❤️ keep making videos.
As always, a fantastic and info packed video!
I really enjoy the scientifically precise language and words when you describe your projects. Also using the metric system makes it easier to follow for us European tech enthusiasts.
What I've found works quite well, is readily available, and extremely cheap for continuous electric ignition is to take a Bosch Quad spark plug, bend the prongs as far open as they'll go, and hook it up to an $8 Sabre stun gun. Works well for gas burners, potato cannons, etc. so unless the arcs aren't "hot" enough I'd guess it would work decently for a jet engine too.
Yep , a lot of the DIY turbine guys use cheap "High Voltage Generators " off Ebay , only cost a few dollars and simple to construct a working ignition , another good method is the auto coil/condensor activated by an auto flasher unit , I used that method for my turbine bike 20 years ago
@@racketmotorman The trick I've personally always used for ignition coils is to make a "trembler" or a "vibrator pack" generator out of a relay, just connect the solenoid and the points in parallel so it makes and breaks the connection. That trick's useful for a lot of things actually, it's even in a lot of old vacuum tube equipment meant to run on DC power to make the plate voltage, cause it's either that or a dynamotor or having to daisy chain several expensive single-use 45 volt B cells together (in the days before transistor based inverters, anyway). Still, way more work and less reliable than just hooking up a grocery store taser to the spark plug instead.
Idk what the hell you just said, but I love it
Really have been enjoying this series. Not only the tips for greater performance, but really the tips for increased safety. Even in cases where a safe current dump can be achieved in 15s, MP improves upon this and ensures the current is dumped in 1s. Top notch, 10/10.
Excellent video series, I intend to start a turbine build soon, so the more information you guys provide, the more grateful I am!
Wonderful series !...cheers.
so much information, excellent
Love this channel.
Hey guys I’ve been following you guys for about 3 years now. Had to say thank you so much for all the incredibly informative videos that you’ve produced over the years. I was wondering if you’d be able to provide some information on the equipment (hardware and software) that you use to make your KZhead videos and perhaps the minimum one would be able to get away with using? Thanks again ✌🏻
This man was created to explain in great cohesion! Great attention in linguistics
This was awesome, solved some issues in my current (pun intented) project. Great explanation of how all of this stuff works. You are a national treasure- keep up the amazing work my man. That 50/50 mix demonstration was perfect. Never would have thought just increasing the spark gap would make such a massive difference.
Thanks!
@@TechIngredients You weren't kidding when you said you read all the comments. Just the simple act of you reading my comment and taking the 10 seconds to respond shows your integrity and your need to teach what you know. Please never stop what you're doing.
I love these videos, they are packed full of useful information. I am searching salvage yards here and there for a used turbo off a big diesel truck. I would like to make one point on commercial aircraft engine starting. Commercial aircraft can only start with air pressure. Either the aircrafts APU or a ground based ASU will be used to spin up the engines. The high pressure bleed air off of the APU is one method by which the engines can be spun up. The other method, is a ground based start cart or auxiliary start unit will be connected to the aircrafts ductwork under the plane. Most major air ports prohibit the use of APUs on the ramp. Ground based power, PCA (preconditioned air), and ASU will be connected to the air craft when it pulls up to the gate.
neat video, I'm trying to remember where I put my coils now.
Love this channel so
Great videos, thank you for making them. Not sure if the procedure with these spark plugs is different (or if anyone mentioned this yet) but a spark gap tool will let you know the gap, and also not take away from the material of the leg
No one has, but I'm aware of them. Thanks.
awesome vid, theyre always great to watch. Were you able to measure the thrust output of this guy?
An interesting concept was studied by the Moscow Aviation Institute back in about 1970. I came across the following report but could find no further info on the study. Interesting to say the least. X-1 Gyroplane This aircraft used a piston engine with an afterburner. The exhaust gases were mixed with fuel, “burned out” and created jet thrust, almost doubling the total power of the power plant with no compressors. Motor-compressor installations are widely known. Here the thrust is generated by the afterburning of the exhaust gases of a piston engine. This miracle was designed and built under the patronage of a very famous aircraft designer and can be considered one of his last (if not the last) work. The X-1 gyroplane was designed at the student design bureau of the Engine-Building University (SKB-2) of the Moscow Aviation Institute. M.L. acted as a consultant for design students. Miles. By design, it resembled the famous WA-116, but its peculiarity was the jet drive of the main rotor. The exhaust gases from the MT-8 motorcycle engine were directed to the main rotor shaft, then to the hollow blades and ejected tangentially from the ends of the blades, adding about 10 hp. power. This is not surprising: the MT-8 engine was very imperfect, the exhaust gas temperature reached 1100 ° C, and the maximum pressure was 6.78 atm. The MT-8 itself rotated the pusher propeller. Power of 10 hp enough to spin the propeller before launch, and during the launch, the burners at the ends of the blades were turned on - afterburners that burnt oxygen in the exhaust gases. The power on the screw increased to 72 hp. - sufficient for vertical takeoff and landing. MT-8 Engine Spec's: K650/MT-8 1967 to 1970 649cc OHV 32 / 24 Hp/Kw The rest of the design was as simple as possible. The fuselage consisted of three steel pipes, at the ends of which the landing gear wheels were placed. Fixed swept keels were also installed on the side supports, which somewhat improved directional stability. The pilot's seat is placed open, the MT-8 engine is behind the seat back. In 1968, the gyroplane was exhibited at VDNKh, work on the preparation of documentation continued in 1969, but there is no information about flights.
i learn alot from you.
I am from India and I am a regular viewer of your channel. Very much inspiring. Your video explains the theory very well and exhibit practical result. No one else do that. Your explanations are a class apart. I am promoting your channel too. Thanks a lot, expecting more
Thanks!
Thank you
You got me thinking and: for me it seems by using regulator based on triacs yes you can delay moment of turning the load on (in this case primary of the transformer) up to quarter of the cycle, but no, you can't switch it off instantly aftetwards, because the triac -once opened - would turn off when the line voltage is crossing zero. Capacitor seems to act as cut-off element. I believe you can get even higher voltage using rate of capacitance creating series resonance circut at one of the line frequency harmonics.
Hi Tech Ingredients, a bit of a far fetched suggestion for next series, but it would be absolutely awe inspiring if you built a Rotating Detonation Engine!
Give us a chance to finish the pulse detonation engine first.🙂
For generating the high voltages, I quite like the Marx generator design. Similar to the voltage multiplier but uses a spark gap at each stage to increase the transient and give a large gain. It is capable of delivering very high voltages (around the 100kV plus). They do take some care to work properly as the currents are definitely in the lethal range. I use a flyback generator to power them and I can readily achieve a 4 inch spark.
Love the video's. The detail in explanation is second to none! I know that high density power storage is something that everyone is after these days. I was curious if you would do a video on the Iron air batteries and what they are actually capable of doing. I think it would be a pretty informative video. What are realistic expectations for something like this? Is this something you could possibly scale to the output of a Tesla power wall, or Is it just a bunch of hype?
I'll look at it.
would you be able to do a video on homemade ceramic composites, ceramic matrix composites (cmc), and metal matrix composites (mmc) for the everyday man? (to make cast parts) using affordable ingredients and tooling/technique that an average joe has access to. thank you so much for the informative, educational, and entertaining content you put out.
If your interested in ideas. I have been looking at jepteras fluidic propulsion engines. Find them fascinating but not a lot of details on them. Its like a superpower dyson fan that provides thrust. Im perplexed how these things can provide so much thrust. The cool part is the air compressor (noise) can be tucked away with sound reduction. Quieter thrust.
My favorite part of the video was when he talked to me like i was actually capable of building a turbo jet engine. Please do more affirmation/supportive content
Your explanations and science are wonderful... I hoped you would follow up on some of your amazing exercises like super magnets, MHDP and generating electricity from ionized gas, petrol powered drones , explosive wire etc!!
Thanks! We're doing just that. Stay tuned.
7:30 voltage multiplier (X) ElectricBoom's the magic wand (V)
The simplest Buzz Box that works very well is a Old Car can coil ,Condenser & a 3 way relay to run it.30,000 Volts and a few amps will fire up any Jet Turbine.
Hello, thank you for your clear and concise jet engine information. I have two turbonique T32's. I inherited them and have my mindset on learning and operating them. Now I know that there may be ways to utilize them. I also inherited the chassis of a 70's formula car. So you see where I could possibly be going with this. Any advice would be appreciated. And if you know someone in Southern California, who might want to guide me that would be fantastic. Thanks for your great channel. Cheers!
Great video! 😀 Using a jacketed pyrolysis reactor as a burning chamber would allow to use any fuel - even solid fuel like wood or coal. 😉
the truac is very similar to a magneto on an aircraft engine one or occasionally both mags have a impulse coupling helping turn the magneto fast enough at starter rpm to send the 30 to 40k volts to jump the plug gap in a cylinder with 8:1 to as high as 10:1 compression ratio and fuel mix ther by starting the engine
The details provided in this channel is extremely good. Thanks for the notification option KZhead has. The quality of the content is so amazing. I guess today I got a chance to give a suggestion. I feel the explanation provided for the ignition coil is not accurate. In a closed primary circuit condition, turns ratio & step-up ratio is always valid. Rate of change of voltage doesn't matter, rate of change of magnetic field matters. Compared to 100V 50Hz supply, 100V 5kHz supply has higher rate of change. But the coil voltage will not shoot up more than its turns ratio. But the coil is simply going to reject the supply, the current will be less. The explanation based on the rate of change on voltage is actually inappropriate here. When a current flows through a coil there is a phase delay between current and the voltage. The position where TRIAC turns-on (closes) is not very important. But when the TRIAC is going opens is very important. In a inductor when a voltage is zero current is maximum, the TRIAC turns-off (opens) when the voltage crosses zero where the current is maximum, it disturbs the magnetic field greatly and causes a great voltage. The point is, the sudden voltage is induced in both primary and secondary, while the voltage gradually crosses the zero. As explained earlier the current is not zero, when the voltage crosses zero. 90degree phase delay is applicable only for sine wave, when the sinewave is chopped, the current starts only when the TRIAC gets fired. So it takes more time to reach its max level, here the capacitor helps. In addition to that, Connecting a DC source with in a fraction of second will not cause a step current in the primary coil due to its self inductance. Disconnecting a DC source is not the same. By altering its resistance the inductor cannot rectify the disconnected / broken path. Hence disconnecting a DC source clearly cause a sudden change in current. This will induce a very high voltage. I have done several experiments and projects with this. Connecting a coil to a 1.5V supply with finger will not give a shock. But disconnecting the coil will give. Magnetic field cannot be charged immediately. While connecting, the current flow starts gradually due to the self inductance. But while disconnecting the current path we can make a sudden disturbance in current and hence in the magnetic field.
Even when I end up behind on watching your videos I always leave with a smile I myself don't plan on making a jet engine even if I did consider it once I just don't have the reason to cost ratio high enough it's actually pretty sad to think about lol
This reminds me of a car points and Condenser with an induction coil.
This guy may not have an EE degree, but I do. The sad part, for me at least, is that he does a much better job explaining electrical concepts then I ever could. Well done! One of the best channels on KZhead.
Ya, right. I'm sure you and your colleagues are excellent teachers and are still in the pub.
@@TechIngredients My comment was mean. Probably because I was in the pub to long before I wrote it. I have deleted my comment. I apologize to @HotdogAnd aHayride, and to @Tech Ingredients. He's right. Best channel on KZhead!
Could you do a video on rotation detonation engines? They seem interesting!
Possibly, but first we'll look at pulse detonation engines.
Heh heh. In high school, our tech teacher had us make voltage multipliers as a side project so we could use them as tasers 😂
Will you do a video on shaped charges in the future?
Using a ZVS driving a flyback transformer for my ignition system, can be found for about $30 on ebay, or build relatively easily
Some water collection, storage, purification and if adventurous small-scale desalinization
Typically only smaller turbine engines (up to a few thousand horsepower) use electric motors for starting, and they're typically a dual-purpose starter/generator. For larger engines like you find on jet airliners, the power required for starting is high enough that an electric motor would be too heavy and pull too much current to be practical. Instead, those engines use an air turbine starter (ATS). The ATS uses a high pressure, high volume air supply to spin an impeller, which rotates the engine core through a reduction gearbox. The air can come from an auxiliary power unit (APU), which is a small turbine engine usually mounted in the tail, or from a powerful air compressor on a trailer (a "huffer cart"). You may have noticed that the air conditioning goes away during engine start. This starting method is the reason: all of the APU's available air supply is going to the ATS.
Awesome series! Any chance you'll ever do anything with solar zeolite cooling? I live in the high desert, i'm looking to build a water 'maker' and i'm going to experiment with zeolites for cooling a reservoir below the dew point and using a collector coil or some other setup to condense water from air.
This basic principle is ancient as I'm assuming you know. The super cooling is easier at night as the radiant energy lost into space is the same as during the day, but you don't need exotic coatings to combat the energy deposition from the sun. There are projects constructed out of plastic webbing near the North African cost called dew catchers.
@@TechIngredients Thanks for the reply! I've looked at dew catchers and fog nets, but i don't think we get enough fog days for them to work, although i plan to try those as well. They're suited to coastal areas with uplifting mountains, i'm 500 or more miles from the coast, all the air has been squeezed by the time it gets to me. Now if i could find some way to get the mesh below dew point i'd be doing good. I'm working with the 5-50% humidity on average, fog nets usually need a bit more. What i'm thinking is a sealed zeolite chamber/panel heated by solar (either directly or with a heat exchange loop) to drive off water from the zeolite and condense it back into the cooling side. At night, or when the zeolite is shaded or the heating loop is shut off it would start adsorption of the water vapor from the cold side. I've seen lab demos of both zeolite boiling water poured on it and flash freezing water through rapid adsorption. I'm trying to replicate these experiments/demos on a larger scale, enough to freeze several gallons of water or eutectic, then using the thawing of the ice to run a condensation coil. I'm not thinking of anything more exotic than some copper coils and insulated ranch pipe, a few valves, some computer fans for forced ventilation, and something like Rain-x or other common commercial hydrophobic coating. Maybe some solar vacuum hot water panels, i've got a bunch lying in the yard doing nothing, or a reflector boiler setup to run a steam turbine generator and use the waste heat to recharge the zeolite. I want to try zeolite stable freshener as it's cheap in bulk, but even if i've got to use $1-2000 worth of 3a molecular sieves it's worth the investment for producing water if it works. With the drought getting as bad as it is here out west we get a small fraction of the precip we once got, and now run short on water every dry season. Even producing a few gallons per day would be a game changer as far as not having to haul water up a mountain to grow my own food and ensure self sufficiency.
Thi sis awesome!!! RANT: Not sure why I missed the some of these newer videos. Wondering why KZhead keeps killing my Alarms from what I want to what they think I want?
You are mad - love it.
Would you please consider to make a video about (diy) electrostatic filters. It is a very cool topic and there are not really any good videos about that topic on KZhead. ❤
How about 3D metal printing a design using solidworks to design/simulate? printing the hot section in inconel. Maybe even a turbofan engine if ambitious. 3D printing lends itself very well to the convoluted ducting in a jet engine.
555 timer with a 2n3055 works really good
Good stuff ! 1
Does the spark on your system run continuously, or do you shut it off after successful ignition? Great video series!
The afterburner needs continuous operation. The main combustion chamber doesn't need it, but sometimes I forget to turn it off and that does no harm.
I think, in airplanes they have to run the sparks continuously when entering rainclouds to prevent accidental flameout.
Another great video! Where can I see it running please?
We demonstrated that in the original video. Check it out.
Is this a demonstration model, or do you plan to incorporate it into something functional?
Both.
@@TechIngredients cool. I'm intrigued as to what you intend to use it for.
As ever, your channel is very educational. One question has been plaguing me ever since I saw your earliest Jet episodes… What if you don’t want thrust? What if you wanted rotational mechanical energy…say to generate electricity? It seems to me, that this particular design is of a greater drawback, than a traditional axel flow jet design. Yes, using pre-made turbos, does have it’s advantages. But if you needed/wanted rotational power ( rather than straight thrust ), I would think that you would almost need to feed your afterburner, into yet another turbo, dumping the thrust into the intake and forcing it through the vanes to gain desired rotational motion, from the other half of the second turbo ( I fully grant that I might be overthinking it ).
Firstly, you would not use an afterburner as the output is too hot to work with. I believe the best option is to feed the exhaust from the exducer of the turbine into another turbocharger and use the cool compressed air from its compressor. This opens up a lot of options. This is what we will be doing.
@@TechIngredients Looking forward to seeing how you do it. The thought about the using the output from the afterburner, comes from the idea of reheating, before sending it into another stage of extracting more rotational output…my fingers just got a bit ahead of my brain, and clicked send, before my brain realized there was more to be said. Have you considered some form of heat exchanger, like some commercial micro-turbines use, to increase efficiency?
No. First thing is to get a system that actually works before modifications to increase efficiency.
when will you be moving on to the next phase and adding the second turbocharger in series ?
I really enjoy your content and highly value your method and professionalism. Is there any possible chance of you doing an experiment on engines operating on gasoline fumes appose to liquid being injected . I think that would be a great help to everyone. Thank you
Thanks. The common carburetor does that by design. Did you mean something else?
VIDEO SUGGESTION- Build a good home freeze dryer. The ones you can buy are crazy expensive. The only ones built on youtube have cold traps of dry ice and alcohol that need constant tending and unrealistic usage, fumes, explosion risk, ongoing cost, low volume/high power consumption. PLEASE show us the way master!!!
We'll look at it.
Rather than carefully tuning the distance between the the EDF and the turbojet inlet, maybe it would be easier to set them far apart, and then temporarily connect them with a tube. You could put a flange on the outlet of the EDF and the inlet of the turbojet, and then place/hold a tube between them that mates to those flanges well enough to carry the output. I'm also curious about the possibility of extracting electrical power directly from the engine, rather than using it as a turbojet or a turboshaft. The EDF at the front end could be used to extract a small amount of energy (albeit at the cost of reduced intake pressure) to power the electronics and starting system, for example. On a separete note, I submitted to you an idea about the use of heat pipes. Wondering if you ever saw it. Thanks for the great content - will keep watching and spreading the word.
You're probably right on both counts. Alternatively, a short set of rails could allow you to move it in an out in a controlled fashion. I don't remember seeing that comment.
You often mention a previous pulse detonation engine construction project but I have searched your channel but cannot a video is there a construction video? Do you have a link?
16:46 There's not a chance in hell I'd ever try that at home or anywhere else.
great video as always ty,... would you look at a couple of papers about g forces reached by a nematocyst firing, wondering if there is a mixture of mechanical advantages we dont use or if it is just the mass to force ratio at micro scale that can produce 5000000 gs of acceleration.
Thanks! It is indeed the scale that makes those accelerations possible. Think about the acceleration that a nitrogen molecule makes when it recoils off a solid surface.
@@TechIngredients thanks for the reply, i only have science fiction to guide me and I would have been pinging around ideas with no basis endlessly.
Please look into building a power turbine on the back end that spins a generator, and if you want to get even fancier, a heat exchanger after that to collect waste heat to boil water and spin a steam turbine for another generator, DIY combined cycle power plant
In your first turbojet video, you mentioned using two turbochargers in series to achieve a higher compression ratio. Are you still planning on making a video about that?
Awesome
I wonder if an intercooler stage could be added to a jet engine. In other words, to use some kind of heatsink to cool the compressed intake air. It might be helpful if the compressor were thermally insulated from the combustion section, with some kind of heat-break. If the thrust wasn't too much perhaps some petals could be made for an after-burner, perhaps closed with servos using bellcranks or cams, if you can offset them enough so they stay cool. Where in Home Depot do they keep the Inconel? : )
It could be, but it would reduce the overall efficiency. Intercoolers allow more charge density into a reciprocating engine and thus increase the power output, but they don't increase the efficiency because thermal energy is lost.
5:30 I have the same white board, so maybe this means I can also build a jet engine
Of course you can. Do you have a good spray bottle, obviously you'll need that too.
@@TechIngredients I'm just using a microfiber cloth as a dry eraser
I am using a neon sign transformer that produces a constant arc at around 3kV and 30mA. They are very inexpensive and I got the idea from RCTestFlight where he was making a pumpkin pulse jet
3kV is pretty low, are you sure?
@@TechIngredients Yes I am sure. It will maintain an arc of around 6mm on a standard widened spark plug. This seems surprising as typically 10kV/cm is required in air, but it seems to work well. The overall energy and ignition reliability must be lower however. EDIT: That breakdown voltage estimate is a bit low upon further reading EDIT 2: No, the rating is actually 6kV, makes more sense
That's what I thought, thanks for taking the time to add the correction.
Surprised to see this. Just had a thought about a project of mine. I want to convert an old truck to a Gas turbine hybrid but instead of having a massive battery with 150+ miles range would it be more efficient to have a small "buffer" battery with 50-75 miles of range for quick acceleration? The engine would power an electric generator and not be direct drive like the old GM/Chrysler cars from the 1970s. Thoughts?
That would work. The choice of engine depends on how much complexity and money you want to spend. The battery and electric motors will allow a pretty small engine and decent acceleration.
This is how the BMW i3 runs. Indeed most of the electric hybrid vehicles do the same. A small (usually around the 1l range) engine used to drive a generator and then a small battery. The battery allows you to run completely on the electric system at low speeds and for short distances. For example to reduce emissions in towns. If you were willing to sacrifice that you could use something more akin to an accumulator or capacitive storage, kind of like the kers system used on some F1 cars. It would allow for very rapid power delivery if you wanted to achieve high acceleration rates, but would pay a penalty in specific energy storage. Alternatively you could use a mechanical storage system. Some kind of large flywheel for example. This could also be used in a regenerative mode, to recover kinetic energy on braking and use it to help accelerate away again. Automotives, and especially electric drive trains, are a fascinating and hugely important area of research. It's such a shame that we didn't decide to develop them alongside internal combustion powered vehicles, but there was no incentive for the oil companies to invest in that.
Id Love to see some graphs of thrust output... think it could power an ultralight?
Trying the same kind of starter
Maybe one of those electric hybrid turbo companies would let you have one of their devices for your show. It has an electric motor to spin up the compressor to deal with turbocharger lag time and the motor also works as a generator to extract energy from the exhaust once the exhaust pressure is built up. That is exactly what you need for the concentrated solar power system. Run the compressed air through some pipes heated by concentrated solar. If you got higher efficiency than solar panels, you could sell the system for zillions of dollars. Even if the electrical efficiency was a little less, the waste heat used for space heating and heating water would make the system much more valuable than solar panels. . The generator could also run off of heat stored in a gravel battery. A ton of gravel heated to 500°C stores 100 kwh of energy which could be extracted at a later time. How much does some plastic sheets covered in mylar and some pipes cost compare to solar panels? But the efficiency of turbocharger is supposed to be very good. You might get 30% or 40% efficiency out of the system. People always use heat to boil water to drive a turbine. It can freeze up when it is not running and it has to be supplied with water and there are other issues. Just use compressed air . It may not have as much expansion as steam but it seems so much easier and simpler. Air heated by 600°C expands about three times or increases by about 30 psi. That is more than enough to drive a gas turbine. The concentrated solar arrangement would be easier than using fuel. No flame tubes or fuel iron spark plugs. Just make the compressed air inlet a little smaller than the pipes so that the heated air tends to expand in the direction of the turbine end. A 20' by 20' area would supply about 40,000 watts of solar energy. At 30% efficiency with a 90% efficient generator, that is aboutv10,000 watts. If you use spherical mirror trough mirrors instead of parabolic mirrors, they focus on a cylindrical surface like a pipe. If they are aligned east west you don't need a tracking system. And put some glass tunes around the metal collecting pipes to trap the infrared trying to escape from.the pipes. kzhead.info/sun/nJGOnsx5sYaDq58/bejne.html images.app.goo.gl/hwUBZ7rCi1qbMWUG7
Did you consider compressed air to spool the turbo? Many older transport jets would use bleed air from the apu for starting. Assuming you could supply enough compressed air for long enough to start the engine, you would only have a small nozzle obstructing the intake.
Yes, but the blower works so well there was no reason to pursue it.
@8:05 The things between the capacitors are not in and of themselves "rectifiers". They are in fact diodes which just happen in this instance to perform the function of rectifiers. I suppose you know that, but I thought I would comment because your audience might get into a bad naming habit. All the best!
Hola saludos desde Colombia
also, would you be able to do a video on a turboshaft version of this jet engine, if that's an idea you'd be interested in pursuing in the future? it would be cool to run a turboshaft engine configuration in an RC helicopter or boat
We plan to do that.
@@TechIngredients YAY! i am so excited!
Is this ignition system what's called a CDI (capacitive discharge ignition) ?
I'm glad you said something about the danger of high voltage near the end, but your warning still seemed pretty mild compared with other information I saw recently. That is, a video by someone else said that 700 volts through your skin will burn your flesh too severely to ever properly heal, and 700 volts through your heart is lethal, even at low current. That person didn't give the impression of being an electricity expert.
It's all about balance, if I start flapping and come across like a "Karen" then people are more likely to discount the warning. His video misses a critical factor. Voltage isn't really important, 50 volts can penetrate the skin and a million volts won't hurt you. A static spark generated by a carpet will reach tens of thousands of volts. It's all about current.