Hurricane Turbojet Rescue
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- เผยแพร่เมื่อ 28 ก.ย. 2024
- I built this model turbojet engine back in 2008 and it ran well until I messed up the start sequence in resulting in a "Hot Start". This distorted the nozzle guide vane assembly at the rear of the engine and since then it has been sitting around waiting for me to rectify the situation. In this video I partially disassemble the engine to re machine the inside bore of the nozzle guide vanes and give it a test run.
If you would like to help out Kyle to re-build his small business, you can find his Go Fund Me page here:
www.gofundme.c...
I was shocke when I saw how fast the fuel lasted.
You can see it going down as it was running there at the last.
That was amazing to see.
Thank You !!!!!!!!!!!!!!
At first I thought it's how the video was edited, and he just let it run for an hour or something, just for the fun of it 😄
I should have shown the fuel pump just free pumping the tank dry. It makes you appreciate the fuel flow rate of something like an Airbus A380.
Regards,
Mark
Hey Mark, glad you got the stickers and extremely grateful of you giving a bit of a shoutout. Truly means a lot.
You are an absolute legend 🤘
Did they catch the bastard?
Our thoughts are with you, sir. And you are most correct in his legend status. Next time you're down in the Carlsbad area, visit the Craftsmanship Museum and see the Titan .60 engine Mark built and sent to them for display. I got to see it a couple of years ago.
@@ericg7044 yes… but he was caught be and released 6mo before my fire just for him to do it again. California for ya… He’s currently in jail going through court system again as far as I’m aware.
@@Watchyn_Yarwood thank you very much. I wasn’t aware of that.. now I gotta keep that in mind!
@@ericg7044 they did. But he was actually caught before for arson, and let go 6mo before my fire. Thank you California
Great work on the case rebuild and machining the back of the engine. This was something quite different and unique and I enjoyed it. A long time ago (probably 25 years) a friend built a number of small jet engines. He asked if I could video tape the start ups and running of the engines (he lived with his parents). I went to his place for 2 or 3 weekends in a row and filmed the running of the engines (he possibly did mid week run ups as well). He had the engine setup on a jig so it would not take off, and there was a boundary hedge about 3 meters away from the exhaust. I lather found out that the hedge died off and he got into big trouble because his sister was getting married and the photos were to be taken in the garden of that house. Unfortunately I don't think I have that footage anymore.
Making a working jet engine 25 years ago must have been a real challenge. Just getting the right type of bearings back then would have been difficult. There was a book by a guy named Kurt Shreckling who designed a working turbojet and it must have been around that time. I actually have the book and I fancied the idea of building one but it had a radial compressor made of plywood of all things and it had to be reinforced with carbon fibre to withstand the centrifugal forces. I shied away from the concept but when the magazine article for the Hurricane came out there was already a lot of development of small jet turbines and parts were easier to get.
Regards,
Mark
That engine is absolutely fantastic Mark. The most exciting video I’ve seen in a long time. I was on the edge of my seat while you started it up. You should have it on display in your workshop. Thank you so much for sharing this. Best regards Nobby
I do have the engine in a glass front cabinet and that is what was a bit embarrassing. I knew it wouldn't run and I felt compelled to repair it.
Regards,
Mark
Well done Mark. Such a credit to you mate. Thanks for sharing this video with us. Cheers 🍻 Aaron
Thanks for watching Aaron. I thought you would like it.
Regards,
Mark
Wow, that's an insanely cool little machine!
Hi Mark. That was fascinating to watch. Its strange to see an engine with so few parts actually works. I worked at RR Experimental for 23 years. We built the RB211 series engines. They were bigger and had a few more parts. Like 4 tons of them. Brilliant job.
I saw a RR Trent engine at the Farnborough Airshow a few years ago. It was fascinating to see how complex they really are. I sometimes hear people say that jet engines have just one moving part. Well, err, not really. I still think it's amazing that those engines run for 12 to 15 hours non stop and then they turn the aircraft around and they do it all over again for weeks and months at a time. All the time there is a meltingly hot fire burning inside them.
Regards,
Mark
@@Preso58Mark. I could tell you some stories about building 211;s but Health and Safety might be listening in.
So neat to see this run! My problem is arthritic thumbs, so I am not "all thumbs" when it comes to doing what I do. I'm just all fingers and constantly picking up what I drop 🙂
Off to modify my lathe...
I know what you mean. Good luck with the lathe.
Regards,
Mark
That's a serious leaf blower.
Absolutely amazing!
It's 5 AM already, and I'm on the edge of my seat watching a model jet engine scream. COOL 😀
Thank you!
Great video. Any RC'er will relate to nerves with something new. Still happens to me after over 100 maiden flights. Cheers
One of the reasons I get so nervous is the fiddly nature of the throttle control. I need something with a friction brake on it so it's harder to accidently pump too much fuel at once. There is a range of just 1/8th of a turn between idle speed and full power.
Regards,
Mark
@Preso58 wow. That would make me nervous also.
Hi Mark,
Thank you for this video. really enjoyed see a master at his craft work!
Thanks for that. Jets are cool!
Regards,
Mark
good repair mark.
95% of my self made projects ends up the shell and never be used.
but he, its a hobby and its keep you from the street.
cheers
ben.
I agree. I tend to lose interest in a project once I see it run. But, it's nice to have it in a condition where it will run. I have another couple of engines sitting in storage waiting for upgrades or repairs. One is almost done and the other needs some minor improvements. It is a Stirling engine and they are notoriously difficult because they don't develop a lot of power. Mine has some very slightly misaligned components and it creates just enough friction to stop it running well.
It looks great though. Just not a good runner.
Regards,
Mark
That was amazing! Good to see you back mate!
How amazing would a collaboration between Mark and Clough42 be? Get him to design an automatic control system for this turbine to take some of stress out of its operation.
That would be great. You can buy off the shelf FADEC controllers for model jet engines. They automate the start and shut down sequence and monitor the exhaust gas temperature and the case pressure but manual starts are always stressful.
Regards,
Mark
Coolest thing I have seen this year!!!
30:17 LOL! That’s where the Aliens stepped in the experiment 👽😁👍. RIP little microphone. Mark you are a legend😂.
Thanks. On the original video that I posted to TH-cam back in 2009, I used a Sony Hi8 camcorder and for most of the run, the camera just blanked the sound track. There was probably some sort of limiting software activated.
Regards,
Mark
Hi Mark, new subscriber here (I found you by way of Emma and also your D bit grinder videos). That's a seriously awesome engine! My friend has been wanting to build a turbojet for a while, but I'm not sure we're ready to get there yet. Especially not after seeing how thirsty it is! Have a good one!
Thanks. When I was teaching I would often ask kids what they wanted in terms of a career. A lot would say they wanted to be car mechanics. When asked why they would state that they wanted to work on high performance cars and their engines. I had worked with some aerospace engineers and had been invited to a few industry tours and had seen some seriously big full size jet engines up close. The engineers who worked on them could quote figures to do with air and fuel consumption, pressure ratios and shaft horsepower that would blow the socks off any drag car. I would do my best to encourage those kids to consider careers in aerospace or aircraft maintenance. I was lucky enough to do some work experience at a private helicopter company towards the end of my teaching career. They had several Bell 214B single engine helicopters. They are one of the largest and most powerful single engine turboshaft helicopter in the world. The thing I remember most about working there was the work environment. Everything was clean and ordered and each worker was disciplined and totally focussed on their work. No one raised their voice, they all helped each other and no one cut any corners. It was truly a lovely place to work.
Regards,
Mark
@@Preso58 that's a wonderful idea about asking what kids want to do and what drives them! I just had my first day as a teacher's aide at a tafe in Sydney, I'm going to think about that moving forward :)
Great job Mark!
very interesting, thanks ... suspense on the upcoming videos
Jet engines are awesome! In a fuselage, or not, they are still cool. Have you ever considered adding solar panels to trickle-charge the batteries? Or perhaps overcomplicate things by building a tiny generator that could somehow use the power from the spinning turbine shaft or?? to aid in charging the batteries?
I probably won't run the engine again. I just wanted to get it back in running condition in case an enthusiast drops by to see it run. But a power take off from a free turbine would be perfect for powering a generator and a fuel pump. I recall watching a documentary about a controlled crash of a passenger airliner in the desert to test modern safety protocols. After the remote controlled jet came to rest, the port engine kept running even though the aircraft was mostly destroyed. The ground crew had all sorts of problems stopping the engine because they don't need any electrical power to keep running. They couldn't wait for it to run out of fuel so they pumped water into the engine but even then it was a bit of a mission to get it to quit running.
Regards,
Mark
This could be a very nice starter project for the absolute beginner. Well...
Not! Knowing what I know now, I probably would never have started. The problem was that I was hooked before I read all the magazine articles.
Regards,
Mark
Loved it mate cracking engine
That is awesome! You should build a new one for a video series!
I didn't have a TH-cam channel when I started this project but even now I think it would run to 25 episodes. There's a lot hidden under the chrome outer casing which actually comes from a Toyota Landcruiser oil filter.
Regards,
Mark
This video confirms EXACTLY what one of my neighbours is doing on a Saturday morning once a month. This is a very familiar sound in my neighbourhood followed by the smell of kerosene in the air.
It's better than a petrol operated leaf blower which my neighbours like to deploy every two days. 😬
Regards,
Mark
That was a hell of a lot of fuel used by a tiny engine!
I know! When I first built the engine and ran it for the first time, I had a small aircraft style "clunk" tank inside the control box. It held about 300ml of fuel and I couldn't figure out why the engine started and then stopped before I could get it up to idle. I checked lots of things and then took a look inside the control box and couldn't figure out why the tank was empty. "Maybe it was a leak" I thought. I refilled the tank and it happened again. All of a sudden it dawned on me that the 300ml of fuel was getting used up just starting the engine. It makes you appreciate how much fuel an Airbus A380 uses to get you from Melbourne to Singapore!
Regards,
Mark
Great job getting that eng. sorted and running again. Why not just use that Milwaukee leaf blower over your right shoulder to cool it after running?
The Milwaukee would certainly be up to the task.
Regards,
Mark
WOW, WOW, WOW, What a build! I assume you didn't make the blades used in this? Start up not too different from early full-size jet engines. In military jets, not so much in commercial jets, are problems related to start and shut-down procedures. Always missing from the movies are the constant problems related to fuel management in jets. There is a fun, but real, comment about flying jets, "nothing beats flying an aircraft always low on fuel and with a constant fire on-board". A challenging project would be to get a bunch of sensors, a computer, and reduce the start-up to 1 push-button. Or maybe add an afterburner section to really consume fuel. Very interesting video thanks.
Yes, jets are insanely simple in principle but the notion that there is just one moving part is incorrect. I read a really good book on modern jet engines and the systems for lubrication, fuel metering, sensors and monitoring are not only complex but also they have to be manufactured from very exotic materials and to such high standards. It's no wonder they cost millions and millions of dollars to manufacture. I didn't make the turbine blades for my engine. They were purchased as an unmachined lost wax casting from a supplier in Switzerland. I think they are a heat resisting grade of stainless steel but they were easy enough to machine. I love your quote about constant fire on board. I read the first instalment of the build series which had a very lengthy disclaimer regarding the inherent dangers of disintegrating red hot turbine blades and not standing anywhere near the plane of the turbine disc and still I went ahead with the build. I must be mad!
Regards,
Mark
@@Preso58 In older military aircraft there were markings on aircraft fuselages and engine nacelles warning ground personnel where disintegrating blades could potentially put them at risk. I notice that today's commercial aircraft have exotic Kevlar shrouds within the nacelles. Yes, like so many other things the principals are simple but the execution to put them into practice is complex. Talking about jets, I had an instructor say that while the engines had difficult problems that unlike piston engines the problems were all in one direction, kind of a fun but mostly true generalization.
Sounds like the start up and shut down procedures need some automation! Yet another project for the infinitely long list of projects...
You can buy a FADEC (Full Authority Digital Engine Control) and they make the start up and shut down fully automatic and they can monitor the sequence to check for exhaust gas temperature and case pressure. I visited a jet engine enthusiast who did the balancing on my engine and he showed me one of his model jets with a FADEC operating. It even restarts the turbine at the shut down to cool the engine. Making one from scratch might be beyond my meagre knowledge of electronics. 😥
Regards,
Mark
I would love to have a copy of those plans to make one
There are back issues of the Australian Model Engineer magazines available. The complete build series was published over about 6 issues and it's worth getting the magazines because the build notes are really important. ejwinter.com.au/collections/australian-model-engineer-magazines?srsltid=AfmBOopU9YopN4NiV2DZXK0LdNSL5CdRmHZtWKl_hMrbp7LWmnxZQFkl
The first issue was in volume 135
Regards,
Mark
Wow, incredible Mark, did you make the turbine assemblies or did you have to purchase them?
I had to purchase the castings for turbine wheel, the inner part of the nozzle guide vane assembly and the compressor wheel which is a standard turbocharger compressor. You can now purchase parts for KJ66 turbojets from Aliexpress and they are way cheaper than what I had to pay back in 2008. I think the parts for the hot end are lost wax cast heat resisting stainless steel but they are easy enough to machine.
Regards,
Mark
The bearings only stayed together because of your forethought.
I had both bearings fall apart on me the last time I serviced the engine. It's a wretched thing trying to get all the balls back in. I was terrified it was going to happen on camera. Luckily I was saved that embarrassment.
Regards,
Mark
I rewatched the video. How hot does the exhaust cone get? Not that I am about to touch it.
Does the whole engine get hot?
The temperature at the hot end can get up to around 600 to 750C during the acceleration phase during the start sequence but everything cools down again when the case pressure gets to around 10PSI. At full throttle there is enough mass flow of air through the engine to keep the outer chrome plated case (it's actually sourced from a Toyota Landcruiser oil filter) cool enough to touch. If you stand behind the engine and look directly into the exhaust duct you can see straight into the combustion chamber and it just looks like a really hot light bulb.
Regards,
Mark
Looks great. No weld burn marks! Better than me. Phoenix, Arizona.
Your front panel looks professional. How did you do your labelling?
I have a 50W C02 laser which makes great etched panels. The material is a proprietary 2 ply plastic sheet. You can etch through the top layer to expose the substrate and you can buy it in hundreds of colour combinations and thicknesses.
Regards,
Mark
@@Preso58 thank you Mark. Pat
Amazing. Wow Mark, you really are the best example of a model engineer that I know. I just can’t imagine what went into building that. Did you buy the turbine blades from somewhere?
Thanks John. The tail cone assembly was machined from some thick walled stainless steel hollow bar. Probably about 98% of the stock ended up as swarf. The walls have to be really thin and it's not really practical to roll it up from flat sheet stock. I did buy the turbine wheel, the inner nozzle guide vanes and the compressor wheel. The compressor is just an off the shelf turbocharger part but the hot end parts came from Switzerland. You can now buy them on Aliexpress though and they are a lot cheaper than what I paid for them.
Regards,
Mark
Very very cool vid 👍🏻👍🏻👍🏻👍🏻
My dog did not like the jet engine.
Nor do my cats.
Regards,
Mark
In the poetic words of my teenage son, when he thinks I'm not listening... F*** YEAH! Fantastic video, I enjoyed every second. Thanks for putting it together.
Great job Mark 👍👍
Thanks Mark, such a treat! I was a little shaky too and I'm on the other side of the planet!
Love your porch
I will be showing some more of the house in the next video. We call it a veranda here in Oz. It's a feature of the "Queenslander" house. On hot days you can sit outside and enjoy a breeze.
Regards,
Mark
Good Show Mate: As per normal. What a fun thing. Glad you could fix what was wrong and get it back thrusting. Be well.
Wow nice jet. Need one on the back of my car. Take care Mark.
Steve.
Stuart single points a thread in his shop. Is very pleased. Decides to catch up on his channels. Sees that Mark has made a jet engine. Stuart retreats backwards, bowing reverentially, and quietly exits, stage left. Very, very well done sir.
I must say that up until the time I started the Hurricane I was making steam engines and getting excited about being able to single point a thread, but the writer, Neville Robertson did a fantastic job with the quality of the drawings and the build notes. I also started making my engine before he had published all the articles so I was sort of committed but also tricked into starting the build without full knowledge of what I was in for. There are some tight tolerances and some complicated geometry in the front end of the engine but I made mine using my Colchester lathe and a very old Denbigh horizontal milling machine so it's not like I had a full complement of expensive tools and equipment. But, thank you for the complement just the same.
Regards,
Mark
Gday Preso, how bloody awesome is that, can’t beat the sound of a turbine engine, the tolerances required to build this is out of my pay grade for sure, beautiful engine mate, cheers
Thanks Matty. I reckon you could build one but quadruple the size. Just think! It would be awesome.
Regards,
Mark
Nice video. Very cool project. Mahalo for sharing! : )
Wow, just WOW! Thanks for sharing this. Absolutely awesome!
I really wanted to give you more than just one thumb up at the end of this video sir.
👏👏👏👏👏👌
Cheers Chris
That was fun! Thanks from New Jersey USA
Definitely a thumbs up! That was awesome.
Looks like our cuckoos are back in eastern Australia. Summer is on its way.
This one was fascinating.
It’s a thirsty little engine 👍
Hearing about Kiel was absolutely devastating, it brought a tear to my face, I can't even begin to imagine the pain he's had to endure.
Thank you. It’s been an experience for sure. There’s so much more to this year than what mark brought up. I didn’t want to overwhelm him or sound too much like woe is me… but im trying to push through and work through as best I can 💪
My comment to Kiel was that he had been handed "the rough end of the pineapple" A colloquial saying from Australia meaning that one has had to endure more than their fair share.
Regards,
Mark
@@Preso58 mark that’s actually a scene in the movie “Little Nicky” where Rodney dangerfield shoves a pineapple rough side up, up hitlers ass.
I also loved your saying about the fleas of a thousand camels…. I’d love to hear more of those sayings
@@Preso58 don’t forget the saying about the fleas of a 1000 camels
lovely little engine
I can’t drink a beer as fast as that turbine can empty a tank of fuel!!
Incredible project, Mark! And beautiful, shame it will be tucked away in a cupboard. Your level of craftsmanship and detail is inspiring. And I love your porch! My wife would be very jealous. 🙂 Cheers!
Thanks. The house is a replica of a 1920's "Queenslander". They were typically high set on "stumps" to get airflow under the floor and most had high ceilings (10', 12' or 14'). The aim was to get natural airflow through the house to deal with hot and humid summer heat. They were mostly made from locally sourced hardwood although some had pressed metal ceilings. I will be showing some more drone video of our house in the next video. We call the porch a "verandah" and they are great on hot summer days if there is a nice breeze blowing.
Regards,
Mark
Brilliant.
That is a beautiful engine you have built! You built the whole thing from scratch?
I did have to buy the turbine wheel casting, the nozzle guide vane casting and the compressor wheel. Those parts needed some machining but everything else was machined from bar stock or fabricated from flat stainless steel sheet.
Regards,
Mark
WOW... Great job
Neat 👍🏻
Great video! My dog hated it.
Fun, aren't they? 😁
Very nice looking build.
Fun, but scary too.
Regards,
Mark
really neat !!
Awesome original build and update…enjoyed!!!!
Wow !!
Amazing work Mark.
Thanks for that. It's hard to convey how difficult some of the machining was on that engine. The inner and outer tailcone were machined from some very thick walled stainless steel hollow bar stock. I reckon I machined away nearly 98% of the stock to get some really thin walled sections. The front intake tract was a mission too. It had to be step turned to a set of coordinates and then blended with files and scrapers to keep the tiny clearance between the compressor wheel and the walls of the intake. The good thing was that the build notes were very well written and the drawings were detailed too.
Regards,
Mark
How interesting. Looks like you had a great holiday. That engine is on another level. It looks great. I can understand why you are a little hesitant starting it up. That engine runs at an incredible speed. Wow. Great work sir
Thanks. I remember reading the first article that was published in the Australian Model Engineer magazine and it had a lengthy disclaimer about the dangers of disintegrating turbine blades and heat and fire. With the turbine disc running at 125,000 rpm it doesn't take too much heat to make the disc come apart catastrophically which is why I get really nervous during the acceleration phase of the start. Once the engine gets up to idle speed the engine cools down significantly but you would have seen how hot the tail cone gets before you get enough mass air flow to cool things down. I need a bigger fuel tank so I can take the time to walk around and get a decent look at it running.
Regards,
Mark
Thank you for sharing. Are there no taper or keys for fixing the wheels? Only via friction on the lateral surfaces?
There are no keys and no tapers. The fit between the shaft and the bores of the turbine disc and compressor wheel are extremely close. Each end of the shaft has a left hand thread which puzzled me since it seemed like one would unscrew itself but a more experienced jet engine guy told me that one end was driving and the other end (the compressor end) was being driven. So, I guess the design just relies on the self tightening left hand nuts on the shaft.
Full size engines would have splines.
Regards,
Mark
Nice ... I assume the compresor and power turbine were premade by a company ???
Yes, I bought the turbine and part finished nozzle guide vane castings from a company in Switzerland and the compressor is a standard Garret turbocharger replacement part. I got the compressor locally but the other parts had to be imported. You can now buy the hot end parts from Aliexpress.
Regards,
Mark
As soon as I started the video I knew it looked like something from Kurt Shreckling. I always wanted to build one.
I have the Kurt Shreckling book and I considered making one before the Hurricane project came along. The thought of making a compressor from plywood seemed pretty wacky but I believe a lot of them were successfully completed.
Regards,
Mark
This video and your Titan engine build are fantastic. Great job Mark! Cheers from Phoenix Arizona.
Thanks for that. I am still planning to visit the Craftsmanship Museum to see the Titan engine one more time.
Regards,
Mark
And you made that..!! Bloody brilliant 👏
Yes, I made it but afterwards I think I would not have if I had read the entire series of build notes before I started. I literally looked at the cross section in the first magazine article and thought to myself "how hard can it be?"
Regards,
Mark
Very interesting video. A lot of work getting the engine made. (Also I love the architecture style of your house in the background). Thankyou
Thanks. I will be featuring a bit more of the house in the next video. My son bought his drone over from New Zealand and shot some video from above. It's great to see your house from a different view point. However, I also noticed how full of leaves our guttering was. I am getting too old to be crawling around on the roof.
Regards,
Mark
Awesome little engine, I have a viewer of mine telling me I should make an IC engine, not sure I want to try, but I'm damn sure I wouldn't take on a jet engine, my little machines are not up to maintaining the tolerances needed for that. Can I take it that you bought the Compressor and Turbine fans, or did you make those somehow?
Paul, I purchased the turbine wheel and nozzle guide vanes as castings. I think they would be lost wax castings in heat resisting stainless steel. I also bought the compressor wheel which is just an off the shelf turbocharger part. Probably the most challenging part was the intake tract. It was machined from a solid lump of 6011 aluminium and the profile of the intake had to match the profile of the compressor wheel with a consistent 0.1mm gap all along the curve. Luckily, the magazine article had a comprehensive set of coordinates for shaping that part and the build notes were very well written.
Regards,
Mark
@@Preso58 Thanks for the reply, I would think that none of us hobby machinists would have the gear necessary to make those.
Fantastic video! Do you have videos of the original build? Did you start with a kit, or build it from scratch? Thanks for the video.
Unfortunately, I started on the Hurricane project before I had a TH-cam channel or even a decent video camera. I made my engine mostly from stock I had lying around. I purchased a length of 4140 steel for the main shaft, some 6011 aluminium for the intake tract and the diffuser and I did have to purchase the turbine wheel, the bearings, the nozzle guide vanes and a Toyota Landcruiser oil filter for the outer casing. Everything else came out of my scrap box. You can now buy the turbine wheel and the nozzle guide vane assembly from Aliexpress and it's about 1/3 of the cost of what I had to pay. Most of the rest of the engine is just made from stainless steel sheet stock, some small diameter copper tube and a lot of small cap head screws.
Regards,
Mark
The engine is tremendous, but I also very much like the look of the part of your house we saw. Is it an old one? Looks in perfect shape. Considering your skills, that's no surprise. My dad flew "Dynajet" speed control line airplanes in his teens. That was some kind of reed-valve pulse jet. No turbine. Flow was initiated with - of all things - a hand tire pump. Made a huge buzzing racket nonetheless and ran bright red hot. He often regaled us with stories about recruiting "helpers" who took off running as soon as the engine fired.
Thanks. My wife and I built the house in 1990. It's a replica of a 1920's "Queenslander". We did most of the work ourselves, another case of starting a project with a sort of naïve enthusiasm. It took us a year to get it to lock up stage but we lived on site in what is now my garage and workshop. I had a reasonable knowledge of carpentry but no building experience. We employed good tradesmen to do the plumbing, electrical and the plaster work inside and we paid a builder to do an extension in 2000 to give us an extra bedroom, a deck and a study. In the next video I will show a bit more of the house and our garden. Our son bought his drone over from New Zealand and he gave us some fantastic aerial video which we had never seen before.
I have been wanting to build a pulse jet for quite a few years and I have a friend who can TIG weld but will I ever get around to it? Pulse jets call for a lot of delicate welding of thin stainless steel but like turbojets, they are hot, noisy and scary all at the same time.
Regards,
Mark
Hoi you! Wher's me little darlin' wildlife shots? Eh? 😀
I am saving that for the next video due out in 2 weeks.
Regards,
Mark
Fabulous video, thank you 😊
What are the two cones at that the rear for? Does hot gas flow through them?
The outer larger cone is what actually creates the thrust of the engine. The last 10mm or so is a convergent nozzle which accelerates the gas flow created in the combustion chamber. If you have seen a modern military jet, they have a variable geometry nozzle. The elements that allow the nozzle to open and close are called "Turkey Feathers".
The inner conical structure on the Hurricane engine isn't really necessary but it helps to quieten the engine slightly. I think it's role is to keep the gas flow from becoming too turbulent as it exits the nozzle.
The exhaust flows between the outer and inner cone.
Regards,
Mark
what kills batteries in neglect
Yes, I failed to keep them charged. Hopefully I have learned my lesson.
Regards,
Mark
Hi Mark , I collected the magazines that covered the build and like you thought a piece of cake. But not like you I put it on the back burner and now can't remember where those mags are,
You can still buy the magazines as back issues. ejwinter.com.au sells them.
Regards,
Mark
The verity of excellent subjects is what keeps me coming back to your channel.
Small round knob can be hard to handle, maybe a large hand throttle forward and back. :)
The original control panel was much wider and I had a much larger diameter knob on the the throttle control. I may try to make some sort of lever with a friction clutch so that it doesn't rotate too easily. The danger is bumping the throttle open during the acceleration phase which can lead to blowing the flame front too far back. That's when you get a hot start and the rear end of the engine can be damaged. Most model jet aircraft now use a FADEC control which is fully electronic and it makes use of a lot of sensors to ensure that the start sequence is smooth and trouble free. Really early full size jet aircraft used a clockwork start controller instead of the electronic version.
Regards,
Mark
What is the max thrust of this jet?
On paper it's 10kg. I noticed in the video that the engine was moving forward on the workstand at full thrust. Interestingly, all of the thrust is made in the last 10mm of the tail cone where the small taper is machined into the stainless steel shroud.
Regards,
Mark
Very cool! Rc turbine is something i would love to do in the future. I've flown a turbine before and they are really nice. Cool to see you built one from scratch! Mike
The designer and writer, Neville Robertson, who posted the magazine series told me that lots of builders started making a Hurricane but there were only a couple of makers (in Australia) that actually finished one. I wrote a follow up article for the Australian Model Engineer magazine at the request of Neville Robertson just to show it was possible. At the time that I started, there were very few suppliers for the turbine and nozzle guide vane assembly and the compressor had to be purchased from a turbocharger supplier. Now you can purchase good quality castings for the hot end on Aliexpress and they are about 1/3 of the cost of what I had to pay. The bearings are probably the biggest expense and most of the rest of the parts for the engine came out of my scrap box.
Regards,
Mark
Regards,
Mark
@@Preso58 that's a very cool story! Congrats!
Pretty impressive little engine. Fuel consumption was awesome.
You have and always have had the best most interesting videos on YT! I am astonished that your subscriber count decimal point is not moved one place to the right! We all need to spread the word. And forgive me for repeating myself, but to see the Titan .60 in person at the Craftsmanship Museum was a highlight of my trip to California.
Thanks for the positive feedback. It seems like you have beaten me to the Craftsmanship Museum. We are still planning a visit. Just waiting for the airfares to get back close to pre-covid affordability.
Regards.
Mark.
@@Preso58 I understand the air fare! I only get to visit my son out there every two years or so due to the high cost. By the way, he only live 1.5 miles from the museum! Walking distance even.
Bloody marvellous episode Mark. Well done mate.
I have 2 UPS that use gel batteries on their side. It don't seem to be a problem.
Thanks, others have backed up your observation. I think I just left the batteries discharged for too long.
Regards,
Mark
@@Preso58 They need replacement. Usually in the UPS they only last 2 years, maximum 3 (but in hot Thai climate).
Thank you for sharing.
Very impressive project indeed. Excellent job on the cabinet, finish, panel, et al. Plus no one was harmed during the test firing. Overall very interesting video. Thank you for posting!
I wouldn’t say _no one_ was harmed… my wife has very sensitive hearing, and when the engine started making its high-pitched whine I didn’t turn the volume down fast enough, so she smacked me in the back of my head!
Thanks a lot, Preso!
😂
Yes, sorry about that. I should have included a warning and dressed in hi-vis with a hard hat and hearing protection. And for the record, I did have my hearing protection on during the run. It's hard to convey how loud that engine is. My neighbours probably hate me!
Regards,
Mark
@@Preso58 I don’t know much about your neighbors but if you’re ever in Southwestern Illinois, watch out for my wife! 😂
Amazing Mark! I really like the case design and the hammerite like finish. Very nice. Thank you!
Thanks. There are so many powder coat finishes and textures. I like to collect them just on the offchance that I might want to get a special finish on a part. They are super durable as well.
Regards,
Mark
Great little engines. One of the guys in Greymouth put two on a go-cart frame which was tested on the Greymouth runway. Looked VERY cool at night. Made a hell of a din 😁.
Wonderful to hear you trip over to this side of the pond was again memorable. It's not a bad spot at all in the world 😉.
Cheers
Pete'
Hokitika.
We spent our last couple of days in Greymouth and did the trip up to Punakaiki. We caught the Trans Alpine rail back to Christchurch. Unfortunately, it rained and blew a gale on the day we passed through Hokitika. It was distinctly unpleasant. We did manage to get a selfie in front of the Hokitika beach sign but that's about it. Oh, we did check out the lovely Art Deco theatre. I should do a night run with my engine but I suspect it might upset the neighbours.
Regards,
Mark
Very interesting. I appreciate the high "pucker factor" with running the engine. I have a friend who flies RC jets. He and his flying club buddies make it look straight forward to get the jets started up and flying. A big learning curve in operating the engine and a different big learning curve to fly them. Any hiccup can and does result in a very expensive loss.
Dave.
The modern off the shelf model jet engines can start on kerosene (don't need LPG) and they have FADEC controllers which automate the start and shutdown procedures. They take a lot of the guesswork and switch work out of the process. I hate to think of the poor bearings in these engines. At over 100,000 rpm and a fairly dubious lubrication system they tend to live a short and violent life.
Regards,
Mark
First time for me to see one of these run with an explanation of how it works. I was glued to every second and every word. Awesome.
I recall reading a really well explained description of how a jet engine worked. It stated that the compressor speeds the air up so the pressure drops and this in turn sucks more air into the intake. Then the diffuser then slows the air down so the pressure increases. Once the high pressure air mixes with the fuel and starts burning it expands even more and starts looking for a way out of the engine. The hot gas looks forward towards the diffuser and sees a wall of high pressure so it looks back towards the turbine and says, "Hey, I can get out here". So, it pushes past the nozzle guide vanes and through the turbine blades leaving them spinning as it goes. Best explanation ever!
Regards,
Mark
Reminds me to try and get some Ether (without getting put on a 'list') and brew some Fuel for my Vintage Diesels and give them a run again. Electric got to easy and to clean nearly 30 years ago now but I miss the smell of Burning Ether in the Morning. 😂
I tried and failed to buy some ether a while back. When I was a kid I got my mother to go to the chemist shop to buy some for me and I am still amazed that the chemist sold it to her.
Regards,
Mark
@@Preso58 Yep way back when you could buy from the local Chemists but as we are all clearly Large Scale Meth manufacturers it is a pain. I have found a Chem Supplier that lists it and a price in Melbourne so I will follow it up. If I have a win I will arrange a care package.
Thanks Mark, spotted the jet engine when I was in the fortunate position of visiting your workshop a little over two years ago. Was hoping it would get a second change in life and it did 👍 excellent craftsmanship, as ever 💪!
Thanks. I always felt guilty about having the engine sitting there and knowing it wouldn't run. Next time you visit I can get it out and you can hear it whistle!
Regards,
Mark
Thank you Mark, would love that!
Regards,
Patrick
Good quality VRLA batteries with gel electrolyte such as Yuasa NP series are specified by the manufacturer for horizontal and vertical installation - any orientation except upside down. Standing them up instead of lying flat should make no difference to service life. Elevated temperatures and leaving them discharged are the real killers.
Thanks for that. I am thinking that they were sitting discharged for years so I will try to keep the new ones charged regularly.
Regards,
Mark
Beautiful. My wife and I would love to see it. Thanks for sharing/inspiring a future trip.
Thanks for watching. We had first class weather for the Earnslaw trip and then a couple of days later it rained all day west of the divide when we did the Milford cruise. It's a bit miserable in that sort of weather but you get to see the hundreds of waterfalls running off the sheer walls of the fjord.
@@Preso58 thanks for the description. If you ever make it to the US, Ohio specifically, I’d love to meet up with you.
In the meantime, keep the great videos coming.