😀 Dear Andy, so nice to see that. I found your video coincidentally. Great job, absolutely professionally build. Better than I ever did it. I was happy to see the engine running more or less directly in the first attempt. Kind regards from Switzerland, Thomas Kamps
Thomas! 🤩Thank you so for your work on the design and the book - It helped me achieve an ambition that I've held ever since I saw Kurt Schreckling's FD3 back some time in the 1990s. Thank you so much for your kind comments - I'm glad you found the video!
Very nostalgic as I well remember building mine in 1996/7. I went through the same things you are going through! It is an engine that can power a model aircraft and I remember the first flight one evening at Duxford as it was starting to get dark. We were permitted to fly from the pan at the end of the runway but had to wait for the filming of a Bf109 for Robbie Coltrane to finish. It was worth going there just to hear that plane and see it close up and flying. Eventually we nervously got the engine running and managed just to take off and do one circuit before we noticed fire at the rear of the plane. (It turned out to be caused by the oil bottle getting overheated and melting.) I made lots of mods over the years until It was reasonably reliable, but it did tend to eat bearings as the balance was not good enough. The separate oil system was done away with in favour of oil/fuel mix inserted through the bearing tube pumped by the fuel pump branched off the fuel supply. We met Thomas Kamps at a GTBA day at Leamingtion Spa and saw his own engine running. Happy days! John
Hi John, Thanks very much for the comment. It would have been the mid '90s that I first came across Thomas Kamps' book and the FD3 plans, but at that time, I had no workshop, etc. - and then life got in the way! The intention is to go to liquid fuel with pre-mixed oil (for the bearings) but I haven't got it set up yet. I would love to see it flying, but I'm not an RC pilot! (I'm in the GTBA, but things seem pretty quiet there these days.) Thanks for taking the time to leave such a nice comment!
I’ve been trying for years, I’m a young student fully invested in building an engine, however I have no tools, or materials/capital. I did however save up for a terrible chinese mini lathe, and use it to create bladed disks from sheet steel. It isn’t capable of doing anything like what you’ve shown on your website, with all your nice tools. Lately I’ve lost the confidence in my project due to halted progress, and lack of like minded individuals to discuss with. To say the least, you were very inspiring, and I’d love to confer with you.
Very good project, i have some question since i wish to build one myself: how much is the thrust force produced by one of those? Is it easy enough to increase the thrust created? Like if the dimensions of the turbine get 50% bigger does the turbine produce 50% more thrust? All in all, how much did you spent to build this? Is it worth it in your opinion? Do you have 3d renders that you can “put into a machine” and it “prints” this for you? Or was this made entirely by hand and paper measurements/drawings? If you have those project, are they downloadable or for sale, or are you not intending to give them away? Thank you in advance for the response.
Hi, thanks for the kind words :) I haven't measured the thrust yet - it's still very much on my list to do. The book says about 40N (maybe upto 50N). Thrust depends on mass throughput - this design is limited by the stresses and temperatures that a home-built turbine wheel can withstand (roughly 600°C / 100,000 RPM for a 66mm diameter turbine). A cast inconel turbine wheel would be able to run at higher RPM / temperatures and generate more thrust. Have a look at some of the commercial engines (e.g. JetCat) for mass throughput, thrust & RPM specifications - they are pretty impressive - over 1000N from the biggest engine. I didn't keep track of costs - maybe £150 - £200 for materials? But I was doing this as something to keep me amused, so it was money well spent from that point of view! 😄
@@Mister_G thank you for the information, i was already aware of the moltitude of jet engines on the market but i was searching something a little more affordable, (1000N is impressive, but 25’000€ for one is off budget by A LOT). It’s very interesting to know that you can build one that is a lot less powerful but still functioning nonetheless and built with a lot less money. Amazing! Keep up the good work! Thanks again
Looks like there is more pressure at the oil supply side no oil delivery you can see bubbles in the oil container when the engine shuts down the oil line is filled, you need the gas bottle upside down when running to get liquid gas be careful on liquid .
Cheers! Yes, very observant - I took the pressure supply for the oil bottle from the starting gas injector which is inserted into one of the vaporiser tubes. I didn't appreciate at the time that the pressure there would be below the case pressure once the speed picked up. (I think that's the cause, anyway.) I think I was lucky and need to make sure it's working properly on the next run. Thanks very much for the comment. 👍
@@Mister_G excellent build log I thought the mounting stand was something off a full size aircraft till I read it ,shows what can be done on a small bench lathe.
Thanks for the comment: This was just the first test run, so only gas (propane) was used. Because of this I had a separate lubricant supply as a temporary arrangement. The later video has it running on kerosene with some used for lubrication. ruclips.net/video/cECE_XQOrdQ/видео.htmlsi=Gz5PFzfzmgn5KkEO Google translate:"Danke für den Kommentar. Dies war nur der erste Testlauf, daher wurde nur Gas (Propan) verwendet. Aus diesem Grund hatte ich vorübergehend eine separate Schmierstoffversorgung. Im späteren Video läuft es mit Kerosin, wobei etwas davon zur Schmierung verwendet wird."
Thank you very much 🙂 You can buy them from many places that supply RC model planes, but they are $$$ (For example, have a look at www.turbinenshop.com/epages/61996464.sf/en_US/?ObjectPath=/Shops/61996464/Categories/Turbinen/JetCat/Strahlturbinen ) Thanks for watching 👍
@@ekremdursunluer9119 The turbine wheel is made from a high temperature nickel alloy called 'Hastelloy X' (or sometimes just 'Alloy X'). It is not as strong as Inconel at temperature, but much stronger than stainless steel. (It is what I could get hold of at the time.) www.haynesintl.com/alloys/alloy-portfolio_/High-temperature-Alloys/HASTELLOY-X-alloy/HASTELLOY-X-principal-features.aspx The NGV and vaporiser tubes are 316 stainless steel, and the combustion chamber is 304 stainless steel. Thanks for watching :)
Thank you very much! I didn't measure EGT - I just kept an eye on the turbine to make sure it wasn't glowing for this test. Things obviously got quite hot during the surges, but I hope that was just a transitory effect. I intend to monitor EGT once I start trying to run it on kerosene. I don't have any means of monitoring vibration, other than observing and listening. For this test, I was very pleasantly surprised at how smooth and quietly it ran. Once the speeds pick up, I'm sure that will change. Thanks for the feedback :)
Hi, Thanks! I used the 'rocking' method to start with (shaft and turbine on its bearings in a loose fitting tube, then rock gently from side to side and see where the heavy spot is), but then tried the method in Kurt's original book where you hold the rear bearing in your fingers and spin the shaft/turbine up with compressed air to feel for vibrations - I found the second method more sensitive - I was surprised!
@@Mister_G yes I used same method as kurt's original. But still I hear bearing noise .if u check my video u can hear bearing noise in the video. When roter system is good balanced u hear only jet roaring sound
@@Umarzaman8400 Not sure - do you get vibration too? When I fitted the turbine to the shaft, I found it *very* easy to send the shaft out of true when the turbine nut was tightened unless everything was absolutely scrupulously clean (if the spacers aren't *absolutely* parallel, you can get the same thing) - it will still balance statically, but will be out of dynamic balance if this happens - just a thought! :)
@@Mister_G Thank you so much for your answers, i really appretiate it, may you tell me please what will i do if i use the gas caritage cv470 as a casing what kind of machining will i use to transfer it to be a casing, and the second question what's the difference between kj66 and kamps turbine and the third question what will i need to modify if i used a spark plug in the system :)
@@yousefashry2126 A CV470 canister is not big enough to use as a casing for this engine (I would liked to have used one). I've never built a KJ66, but I believe it is optimised for higher mass throughput / RPM. It has a different diffuser, combustion chamber & NGV. It also requires a cast inconel turbine. No real mods for a spark plug - just need to add a threaded boss to the combustion chamber that lines up with a suitable hole in the casing. I doubt that 10mm pipe will fit inside the casing.
Hi - the compressor wheel is a commercial turbo-charger wheel: part# 5326-123-2018. The housing was turned on my mini lathe as described here: misterg.org.uk/turbine-html-16/
@@Mister_G i'd like to build one too, but i don't have the machines to make the parts. i assume you're in the metal industry, do you know how much it world cost to CNC those parts?
@@over2seeyer No, not in the metal industry - just a Chinese 7x14 mini lathe in my shed! The trouble with CNC is that a lot of the cost is for the set-up, so it can be very expensive for one-offs (and none of the parts in this design need CNC). If you don't have any machines, I think you would be better looking for an engine kit with ready machined parts. Have a look at 'Minijet' - I've no idea if they're any good, but they have by far the cheapest kit I've seen (~$400).
good evening sir, i am looking for the cad drawing for this project, because i will do it as my graduation project, and i found it really complex to model it using solidworks. may you provide me with the CAD files please ?
Thanks for watching and taking the time to comment. The fuel is propane in this video - there is no air in it at all. The leak is from the pressure feed to the lubricant supply.
Came across this by accident; WTF do your neighbours think of it.....? I would be reporting it to the Environmental Health on grounds of noise pollution, failing that I'd be around to yours with a big hammer!
😀 Dear Andy, so nice to see that. I found your video coincidentally. Great job, absolutely professionally build. Better than I ever did it. I was happy to see the engine running more or less directly in the first attempt. Kind regards from Switzerland, Thomas Kamps
Thomas! 🤩Thank you so for your work on the design and the book - It helped me achieve an ambition that I've held ever since I saw Kurt Schreckling's FD3 back some time in the 1990s.
Thank you so much for your kind comments - I'm glad you found the video!
Very nostalgic as I well remember building mine in 1996/7. I went through the same things you are going through! It is an engine that can power a model aircraft and I remember the first flight one evening at Duxford as it was starting to get dark. We were permitted to fly from the pan at the end of the runway but had to wait for the filming of a Bf109 for Robbie Coltrane to finish. It was worth going there just to hear that plane and see it close up and flying. Eventually we nervously got the engine running and managed just to take off and do one circuit before we noticed fire at the rear of the plane. (It turned out to be caused by the oil bottle getting overheated and melting.) I made lots of mods over the years until It was reasonably reliable, but it did tend to eat bearings as the balance was not good enough. The separate oil system was done away with in favour of oil/fuel mix inserted through the bearing tube pumped by the fuel pump branched off the fuel supply. We met Thomas Kamps at a GTBA day at Leamingtion Spa and saw his own engine running. Happy days! John
Hi John, Thanks very much for the comment. It would have been the mid '90s that I first came across Thomas Kamps' book and the FD3 plans, but at that time, I had no workshop, etc. - and then life got in the way!
The intention is to go to liquid fuel with pre-mixed oil (for the bearings) but I haven't got it set up yet. I would love to see it flying, but I'm not an RC pilot! (I'm in the GTBA, but things seem pretty quiet there these days.)
Thanks for taking the time to leave such a nice comment!
I’ve been trying for years, I’m a young student fully invested in building an engine, however I have no tools, or materials/capital. I did however save up for a terrible chinese mini lathe, and use it to create bladed disks from sheet steel. It isn’t capable of doing anything like what you’ve shown on your website, with all your nice tools. Lately I’ve lost the confidence in my project due to halted progress, and lack of like minded individuals to discuss with. To say the least, you were very inspiring, and I’d love to confer with you.
The engine was made with a Chinese mini lathe. Feel free to drop me a message via my website if you like.
Absolutely brilliant! I'm watching you closely. Yep, you're doing things in your tight work space..... but that makes it that more amazing:)
Thank you very much! 😁
This thing is kicking ass good job
Thank you!! 😁
Hi,
nice built and smooth running👍
I dont see and hear any vibrations.
Thats good for the bearings and for the performance.
Good luck😉
Andy
Thank you very much! I've watched your videos and followed your builds for some inspiration! 😁
That slow idle. Very nice work.
Thank you! 🙂
Very good project, i have some question since i wish to build one myself: how much is the thrust force produced by one of those? Is it easy enough to increase the thrust created? Like if the dimensions of the turbine get 50% bigger does the turbine produce 50% more thrust?
All in all, how much did you spent to build this? Is it worth it in your opinion?
Do you have 3d renders that you can “put into a machine” and it “prints” this for you? Or was this made entirely by hand and paper measurements/drawings?
If you have those project, are they downloadable or for sale, or are you not intending to give them away?
Thank you in advance for the response.
Hi, thanks for the kind words :) I haven't measured the thrust yet - it's still very much on my list to do. The book says about 40N (maybe upto 50N). Thrust depends on mass throughput - this design is limited by the stresses and temperatures that a home-built turbine wheel can withstand (roughly 600°C / 100,000 RPM for a 66mm diameter turbine). A cast inconel turbine wheel would be able to run at higher RPM / temperatures and generate more thrust. Have a look at some of the commercial engines (e.g. JetCat) for mass throughput, thrust & RPM specifications - they are pretty impressive - over 1000N from the biggest engine.
I didn't keep track of costs - maybe £150 - £200 for materials? But I was doing this as something to keep me amused, so it was money well spent from that point of view! 😄
@@Mister_G thank you for the information, i was already aware of the moltitude of jet engines on the market but i was searching something a little more affordable, (1000N is impressive, but 25’000€ for one is off budget by A LOT).
It’s very interesting to know that you can build one that is a lot less powerful but still functioning nonetheless and built with a lot less money. Amazing! Keep up the good work! Thanks again
@@Nico-xt7wt No worries - thanks for the interest.
Looks like there is more pressure at the oil supply side no oil delivery you can see bubbles in the oil container when the engine shuts down the oil line is filled,
you need the gas bottle upside down when running to get liquid gas be careful on liquid .
Cheers! Yes, very observant - I took the pressure supply for the oil bottle from the starting gas injector which is inserted into one of the vaporiser tubes. I didn't appreciate at the time that the pressure there would be below the case pressure once the speed picked up. (I think that's the cause, anyway.) I think I was lucky and need to make sure it's working properly on the next run. Thanks very much for the comment. 👍
@@Mister_G excellent build log I thought the mounting stand was something off a full size aircraft till I read it ,shows what can be done on a small bench lathe.
@@reedy93 Thanks - Glad you liked it! 😁
Das Gas ist nur zum vorheizen, bei ca 15000 umschalten auf Diesel oder Kerosin. Machst du Getrenntschmierung ?
Thanks for the comment: This was just the first test run, so only gas (propane) was used. Because of this I had a separate lubricant supply as a temporary arrangement. The later video has it running on kerosene with some used for lubrication. ruclips.net/video/cECE_XQOrdQ/видео.htmlsi=Gz5PFzfzmgn5KkEO
Google translate:"Danke für den Kommentar. Dies war nur der erste Testlauf, daher wurde nur Gas (Propan) verwendet. Aus diesem Grund hatte ich vorübergehend eine separate Schmierstoffversorgung. Im späteren Video läuft es mit Kerosin, wobei etwas davon zur Schmierung verwendet wird."
Can you please tell me from where can i buy a home jet engine like your?
Your one is amazing ❤️❤️❤️
Thank you very much 🙂
You can buy them from many places that supply RC model planes, but they are $$$ (For example, have a look at www.turbinenshop.com/epages/61996464.sf/en_US/?ObjectPath=/Shops/61996464/Categories/Turbinen/JetCat/Strahlturbinen )
Thanks for watching 👍
Nice work, turbine looks great and precise. Did you preload the bearings?
Hi, thanks very much! Yes, there are a couple of wave washers in front of the rear bearing to provide preload.
@@Mister_G Nice, thanks for the answer , it runs very smooth.
@@cytron8787 No problem - thank YOU very much. I'm as surprised as anybody at how smooth it sounds! :D
great
@@TDP2341 Thank you! Glad you liked it :)
Very good
There are details of how I built this engine here: misterg.org.uk/turbine-html/
Is the turbine wheel made of stainless steel, if so, how long can it be run before maintenance?
@@laor100 No, it's made of nickel alloy (Hastelloy X) - it should be better than stainless.
@@Mister_G like inconel?
@@ekremdursunluer9119 The turbine wheel is made from a high temperature nickel alloy called 'Hastelloy X' (or sometimes just 'Alloy X'). It is not as strong as Inconel at temperature, but much stronger than stainless steel. (It is what I could get hold of at the time.)
www.haynesintl.com/alloys/alloy-portfolio_/High-temperature-Alloys/HASTELLOY-X-alloy/HASTELLOY-X-principal-features.aspx
The NGV and vaporiser tubes are 316 stainless steel, and the combustion chamber is 304 stainless steel.
Thanks for watching :)
Looks beautifully made. Did you monitor EGT and vibrations ?
Thank you very much!
I didn't measure EGT - I just kept an eye on the turbine to make sure it wasn't glowing for this test. Things obviously got quite hot during the surges, but I hope that was just a transitory effect. I intend to monitor EGT once I start trying to run it on kerosene. I don't have any means of monitoring vibration, other than observing and listening. For this test, I was very pleasantly surprised at how smooth and quietly it ran. Once the speeds pick up, I'm sure that will change.
Thanks for the feedback :)
Nice job done👍. What method u use to balance the rotor system?
Hi, Thanks! I used the 'rocking' method to start with (shaft and turbine on its bearings in a loose fitting tube, then rock gently from side to side and see where the heavy spot is), but then tried the method in Kurt's original book where you hold the rear bearing in your fingers and spin the shaft/turbine up with compressed air to feel for vibrations - I found the second method more sensitive - I was surprised!
@@Mister_G yes I used same method as kurt's original. But still I hear bearing noise .if u check my video u can hear bearing noise in the video. When roter system is good balanced u hear only jet roaring sound
@@Umarzaman8400 Not sure - do you get vibration too? When I fitted the turbine to the shaft, I found it *very* easy to send the shaft out of true when the turbine nut was tightened unless everything was absolutely scrupulously clean (if the spacers aren't *absolutely* parallel, you can get the same thing) - it will still balance statically, but will be out of dynamic balance if this happens - just a thought! :)
Nicely built engine. I like the exhaust cone. Nice and shiny.
Can I use 708 bearing for this one? And what do I have to change if I used 22*10*6 angular contact bearing?
The bearings are 608 size (22 x 8 x 7) - full complement ceramic are best - you can make your own: misterg.org.uk/turbine-html-10/
708 are the Same size but angular contact and can withstand speeds up to 120krpm
How does the engine continue to run after the external compressed air supply has been stopped?
Hi - it is a gas turbine: It has a combustion chamber inside that is being supplied with fuel (propane/butane in this case).
can you tell me please the length and the daimter of the fuel manifold?
Hi, the fuel manifold is a ring of 4mm pipe about 80mm diameter.
HTH :)
@@Mister_G Thank you so much for your answers, i really appretiate it, may you tell me please what will i do if i use the gas caritage cv470 as a casing what kind of machining will i use to transfer it to be a casing, and the second question what's the difference between kj66 and kamps turbine and the third question what will i need to modify if i used a spark plug in the system :)
@@Mister_G can i use 10mm pipe instead?
@@yousefashry2126 A CV470 canister is not big enough to use as a casing for this engine (I would liked to have used one).
I've never built a KJ66, but I believe it is optimised for higher mass throughput / RPM. It has a different diffuser, combustion chamber & NGV. It also requires a cast inconel turbine.
No real mods for a spark plug - just need to add a threaded boss to the combustion chamber that lines up with a suitable hole in the casing.
I doubt that 10mm pipe will fit inside the casing.
How to make that compresser.
Hi - the compressor wheel is a commercial turbo-charger wheel: part# 5326-123-2018. The housing was turned on my mini lathe as described here: misterg.org.uk/turbine-html-16/
@@Mister_G Thank you.
How do you calculate the volume of that shape?
The short answer is "Fusion 360" 🙂 (Which shape do you mean, and why would you want to calculate its volume?)
Thanks for watching.
Like how do you know how much pressure is inside that cylinder shape?
@@zootzyzanta1414 There is a pressure gauge connected to the space inside the outer cylinder (casing) - see 0:50 ).
how much thrust does it make?
Yet to be determined, but I'll be back to it soon and post a video. The design is for 40-50N, depending on how brave you feel :)
@@Mister_G thanks for the reply.
may i ask how much it cost to machine all those parts? minus the compressor wheel, turbine wheel and the NGV
@@over2seeyer It didn't cost me anything, other than the raw material - I just do this for fun.
@@Mister_G i'd like to build one too, but i don't have the machines to make the parts.
i assume you're in the metal industry, do you know how much it world cost to CNC those parts?
@@over2seeyer No, not in the metal industry - just a Chinese 7x14 mini lathe in my shed!
The trouble with CNC is that a lot of the cost is for the set-up, so it can be very expensive for one-offs (and none of the parts in this design need CNC). If you don't have any machines, I think you would be better looking for an engine kit with ready machined parts. Have a look at 'Minijet' - I've no idea if they're any good, but they have by far the cheapest kit I've seen (~$400).
good evening sir, i am looking for the cad drawing for this project, because i will do it as my graduation project, and i found it really complex to model it using solidworks. may you provide me with the CAD files please ?
Hi - No, sorry (it isn't my design). Shouldn't your graduation project be your own work, anyway?
It could be the same but with some significant enhancements
Compression wheel part number?
The one I bought was sold as 5326-123-2018, but may actually have been 5326-123-2037 as the radius on the intake nozzle needed to be changed.
A leak? Too much air in the fuel.
Thanks for watching and taking the time to comment. The fuel is propane in this video - there is no air in it at all. The leak is from the pressure feed to the lubricant supply.
Came across this by accident; WTF do your neighbours think of it.....? I would be reporting it to the Environmental Health on grounds of noise pollution, failing that I'd be around to yours with a big hammer!
LOL! Thanks - Running like this, it's not too intrusive, but I pick my times.