Hey, hope you're doing okay. You're on the right track, and making me want to try EDF afterburners again! I was messing with them in like 2015-16 when I first found the David Windestal Flite Test video. This week, I bought a couple of the biggest HET motors (1w-50) that can fit my housings (64mm Cyclone power aluminum), and those units come with 4 and 6 blade rotors. I also got a couple freewing 64mm units with 11blade rotors to try. My basic theory is that with 3 different rotors, a motor that can pump 4KW+ into a tiny 64mm fan, and plenty of trial and error, I can figure out the best balance of efflux velocity vs static pressure. My other idea is something I haven't seen anybody try yet: In a full sized jet engine, there are multiple stages to the compressor section. I'm going to try putting one of my RC Lander alloy 50mm EDFs behind a 64mm as a second stage. If you look at a cross section of any jet, you'll see the compressor sections get progressively smaller. It probably will all end up just being a restriction on the 64mm, or overspeeding the 50mm (or both), but if it doesn't, I'm going to try putting the afterburner LAST in the setup (after the 50mm), for maximum static pressure AND efflux. Back in 2016ish, I tried different fuels in the Windestal clones I made. One really promising one was WD40, or the generic equivalent. It seems to have MUCH more energy than butane, is more stable, harder to blow out, and on the geek side, it smells just like jet fuel >:o)
I really loved seeing Schlieren on a jet of air like that! Personally i think pursuing EDF afterburners would be more interesting as that is not something often tried with effort on UA-cam. In the Schlieren episode, could you try to fire a model rocket motor and short exposure photography? Like even a tiny motor should have interesting flow right by the nozzle and short exposure should ensure it is clear and sharp
I think adding a few stators as you mentioned and making the nozzle longer could help. After all, all the burning that happens outside of the nozzle doesn't do you any good.
Just discovered you. I had a thought about your exact edf/jet hybrid build and had to look into it… seems like you’re already on the case. Can’t wait to see where you go with this
Hey, i watched your older video as well is it possible to make a hybrid peroxide engine to pressurize air speeds, simultaneously mixing with fuel to start the ramjet. Integza has tried to make a peroxide one as well as various different engines. Hope to see this channel grow. 👍
smart ! a compressor wheel makes higher pressure ... im thinking of placing an EDF in front just to test ... you're way further ahead , my design is like a hybrid turbo Pulse jet ..
I would love to see more of the EDF afterburner. I am working on one myself and would love to see some advancements you could make. If I may leave a few ideas... Use a butane/propane mix commonly found in gas torches instead of pure butane. Experiment with liquid fuels or a gas/liquid mixture (WD40 has worked before) to color the afterburner. And most importantly really, experiment with different flame holders and other designs to find the most reliable and easy to replicate design. And if you want to, I could send you some 3d files for a super simple variable area nozzle I designed for use in my afterburner, would love to see that thrust-tested on your rig. I already tested it with no burner, there it barely had effect.
Instead of using a turbo design which is designed for air pressure, you can make an Axle Compressor which is suited for fast air flow… - A turbo charger design loses fast airflow due to the 90 degree angle in the intake, an axle compressor has smooth airflow without loss of energy while keeping the air compressed at high speeds.
So ive had the idea for a while to do this, but has always seemed like it doesnt produce much thrust as compared to the added weight of elecreinucs, hosuing etc.. If you csn get this to produce some decent thrust i would seriously consider investing in this tech for small drone applications.
It really doesn’t add a lot of thrust especially when you account for the added fuel and electronics, it’s more for show and to test the high heat capabilities of the carbon fiber I was using
did you do any math behind this project? I am pursuing a similar project, but i do not have any fabrication methods and therfore have to just desgin it on paper.
there's a bit of basic math behind the propulsion but there are so many factors that experimentation is the only true way of determining the efficiency.
Man iv been waiting for this video since the last one came out, the afterburner on edf is practically useless, edf's rely on high rpm to be efficient and that afterburner isnt helping. You should build a complete jet engine, it is the true way although pretty tough. Instead of puting one compression stage, i would prefer to make an intake and then a compression stage as 3d printed compressors dont truly work... Make the intake wide in radius and, and then the compression part should bottle down, this is the only way you can practically compress on this level, or use a actual turbocharger. Working with carbon fibre may not be easy, and is probably very expensive. I prefer steel bottles, they can be close enough to the shape/size you want or you could design an engine around it. Steel bottles are usually thin walled just enough for this purpose.
you are using way to much fuel for this to be anywhere near efficient, rule of thumb is if you have fire outside the engine then its not running lean enough. however you have a nice blue flame which indicates a clean burn. i would suggest putting a burner ring in the center of the engine as well, the more even the burn throughout the engine the more thrust you can expect to gain. also at some point you may want to lock that spark plug down somehow to stop it from popping out.
My biggest problem with butane is temperature control, I think I’m gonna try and warm it up before it reaches the engine to reduce the amount needed for startup and running. I’m trying to design a screw-in spark plug but it’s a bit tricky with the carbon fiber
Very interesting development and testing
Hey, hope you're doing okay. You're on the right track, and making me want to try EDF afterburners again! I was messing with them in like 2015-16 when I first found the David Windestal Flite Test video. This week, I bought a couple of the biggest HET motors (1w-50) that can fit my housings (64mm Cyclone power aluminum), and those units come with 4 and 6 blade rotors. I also got a couple freewing 64mm units with 11blade rotors to try.
My basic theory is that with 3 different rotors, a motor that can pump 4KW+ into a tiny 64mm fan, and plenty of trial and error, I can figure out the best balance of efflux velocity vs static pressure. My other idea is something I haven't seen anybody try yet:
In a full sized jet engine, there are multiple stages to the compressor section. I'm going to try putting one of my RC Lander alloy 50mm EDFs behind a 64mm as a second stage. If you look at a cross section of any jet, you'll see the compressor sections get progressively smaller. It probably will all end up just being a restriction on the 64mm, or overspeeding the 50mm (or both), but if it doesn't, I'm going to try putting the afterburner LAST in the setup (after the 50mm), for maximum static pressure AND efflux.
Back in 2016ish, I tried different fuels in the Windestal clones I made. One really promising one was WD40, or the generic equivalent. It seems to have MUCH more energy than butane, is more stable, harder to blow out, and on the geek side, it smells just like jet fuel >:o)
Follow the process it's leading you to a destination.
Im glad to see that afterburner again
I really loved seeing Schlieren on a jet of air like that! Personally i think pursuing EDF afterburners would be more interesting as that is not something often tried with effort on UA-cam.
In the Schlieren episode, could you try to fire a model rocket motor and short exposure photography? Like even a tiny motor should have interesting flow right by the nozzle and short exposure should ensure it is clear and sharp
I think adding a few stators as you mentioned and making the nozzle longer could help. After all, all the burning that happens outside of the nozzle doesn't do you any good.
Edf after burners at a weight point that will allow them to be flown in an fpv plane :)
Just discovered you. I had a thought about your exact edf/jet hybrid build and had to look into it… seems like you’re already on the case. Can’t wait to see where you go with this
I like to watch you perfect a simple design such as an EDF afterburner
It's a really good approach to make a properly working jet engine. beautiful work!
Bro your channel is amazing, keep it up.
Schlieren imaging is really interesting. And, I think continuing on the carbon fiber jet engine path is a good path to follow
Hey, i watched your older video as well is it possible to make a hybrid peroxide engine to pressurize air speeds, simultaneously mixing with fuel to start the ramjet. Integza has tried to make a peroxide one as well as various different engines. Hope to see this channel grow. 👍
smart ! a compressor wheel makes higher pressure ... im thinking of placing an EDF in front just to test ... you're way further ahead , my design is like a hybrid turbo Pulse jet ..
I think you should use diysen vacom moter it's 400000 rpm also control the trust space with servos
I would love to see more of the EDF afterburner. I am working on one myself and would love to see some advancements you could make. If I may leave a few ideas... Use a butane/propane mix commonly found in gas torches instead of pure butane. Experiment with liquid fuels or a gas/liquid mixture (WD40 has worked before) to color the afterburner. And most importantly really, experiment with different flame holders and other designs to find the most reliable and easy to replicate design. And if you want to, I could send you some 3d files for a super simple variable area nozzle I designed for use in my afterburner, would love to see that thrust-tested on your rig. I already tested it with no burner, there it barely had effect.
Instead of using a turbo design which is designed for air pressure, you can make an Axle Compressor which is suited for fast air flow…
- A turbo charger design loses fast airflow due to the 90 degree angle in the intake, an axle compressor has smooth airflow without loss of energy while keeping the air compressed at high speeds.
This is a great idea, I'm going to do some testing to see what designs are the best.
You need to make one with a variable afterburner
Love the Homebuild, good video as well, but please buy yourself a Pop Filter their 10 bucks and will improve your audio quality alot
I actually have one but I forgot to put it back on my mic after fixing it. Oops.
I think that you should build a jet engine first then build an afterburner to add to that engine
So ive had the idea for a while to do this, but has always seemed like it doesnt produce much thrust as compared to the added weight of elecreinucs, hosuing etc..
If you csn get this to produce some decent thrust i would seriously consider investing in this tech for small drone applications.
It really doesn’t add a lot of thrust especially when you account for the added fuel and electronics, it’s more for show and to test the high heat capabilities of the carbon fiber I was using
Super cool
How many rpms can printed compressor make before exploding? Have u measured this factor?
did you do any math behind this project? I am pursuing a similar project, but i do not have any fabrication methods and therfore have to just desgin it on paper.
there's a bit of basic math behind the propulsion but there are so many factors that experimentation is the only true way of determining the efficiency.
Man iv been waiting for this video since the last one came out, the afterburner on edf is practically useless, edf's rely on high rpm to be efficient and that afterburner isnt helping.
You should build a complete jet engine, it is the true way although pretty tough.
Instead of puting one compression stage, i would prefer to make an intake and then a compression stage as 3d printed compressors dont truly work...
Make the intake wide in radius and, and then the compression part should bottle down, this is the only way you can practically compress on this level, or use a actual turbocharger.
Working with carbon fibre may not be easy, and is probably very expensive.
I prefer steel bottles, they can be close enough to the shape/size you want or you could design an engine around it.
Steel bottles are usually thin walled just enough for this purpose.
you are using way to much fuel for this to be anywhere near efficient, rule of thumb is if you have fire outside the engine then its not running lean enough. however you have a nice blue flame which indicates a clean burn. i would suggest putting a burner ring in the center of the engine as well, the more even the burn throughout the engine the more thrust you can expect to gain. also at some point you may want to lock that spark plug down somehow to stop it from popping out.
My biggest problem with butane is temperature control, I think I’m gonna try and warm it up before it reaches the engine to reduce the amount needed for startup and running. I’m trying to design a screw-in spark plug but it’s a bit tricky with the carbon fiber
Would love to help out! I know someone who could build your carbon parts professionally 🤓
Appreciate the offer but I gotta keep it cheap and diy