Supercharged Micro Radial Engine: Making of (New Project coming soon!)
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- เผยแพร่เมื่อ 6 มิ.ย. 2024
- I made this engine back in Summer 2016 and finally, there is a video of how I made it.
There will be another video in a few weeks or so, as I am currently working on a new project. It is a variable pitch propeller drivetrain for a very large RC-airplane. It will be the biggest, most sophisticated RC-Airplane propulsion system I have ever made. - วิทยาศาสตร์และเทคโนโลยี
![Genshin Impact | กาชา Clorinde ไวฟุนั้น ควร C6 [เทสตัวละครต่อ]](http://i.ytimg.com/vi/SOVaBvL7K20/mqdefault.jpg)
1974 I made a twin opposing cox .049 . I single pointed the crank case bores in a southbend lathe turning the chuck by hand. Used the reed valve the same as Cox but engine only ran on prime then quit. I was 16 years old in trade school. This was so much fun the watch!
Was the engine set up in a boxer configuration or did they run on the same bearing 9n the crankshaft, i.e. dounble throw versus single throw?
If the latter it would've run only on the prime as there wouldn't have been any pulsing in the crankcase to operate the reed valve.
Also they very very sensitive to the sealing on the front of the crank as that would also influence the gas tight seal.
Well done on trying though, personally I was into the making of the RC gear from kitsets, that's how long I've been modelling!
I built a 5 cylinder cox radial and I also had to make my own die. This was back in 2000. I got over 12,000 rpm on a 9x4 prop.
This is soooo impressive...! The pinnacle of traditional engineering.
You go man your living my childhood dream. I always wanted a Cox radial. I thought that up in the late 70 s but never did it
As much trouble as we had with em as a kid I would only hope 5 at once would not mean 5 times more trouble! Thanks for sharing, very nice video and excellent piece of work!
heh. That thing runs pretty good. And a nice, simple, robust way of solving the issue of scavenging on a radial two stroke where there would be no natural pre-compression. Technically speaking the engine is naturally aspirated; it draws heavy parallels with the Detroit Diesel 2-stroke truck engines and EMD 2-stroke locomotive engines scattered across America, mostly in how they breathe. Like this engine, they lack natural pre-comp, so they use a supercharger to force feed the cylinders, and are considered N/A when there is no boost device feeding into that supercharger.
Can't wait to see it fly!
the engines you speak of have an exhaust valve in the head so it can stop the charger blowing unburnt gases out of the exhaust, like is happening in this video
@@tom5051666 Ye the supercharger would be wasting a tremendous amount of fuel/air charge in this engine, but it's also the only way a common-crankcase single row radial two stroke could function.
I want to see this one on a four stroke engine, where it’s supposed to be and where it would work.
2 stroke cox radial....simply awesome building skills...my respect!
Sei un ARTISTA , non ho mai visto una opera tanto PERFETTA e FUNZIONALE .
I miei complimenti 🎉. Continua SEMPRE così 👍👍👍👍👍
What a sweet build. Fantastic.
Ich freue mich schon diesen Motor in Action zu sehen! Hut ab von dieser genialen Arbeit!
My goodness - what an extraordinary piece of work!
The precise drawings were an encouraging sign from the beginning. I was concerned that if the crankcase volume were too great, there could be a risk of the downward movement of a piston failing to boost crankcase pressure sufficiently to send a charge through the transfer ports, but I guess the compressor neatly obviates that potential problem.
Beautiful craftsmanship!. Well done Sir.
AN ABSOLUTE MASTERPIECE!
Incredible workmanship! Love it!
Thanks man!
What a wonderful piece of engineering and such a creative idea!….brilliant!
Excellent engineering and construction!!!!!! Ya should market this !!!! Believe me it would sell !!!!!
Marvellous work there! Great video too.
That is a work of Art. Amazing. Well done !👍
Thank you for completing my childhood dream!! Awesome work!
Thanks man!
Awesome! I envy your talent and skill!
truly amazing , congrats and thanks for the video
Beautiful work and video. Well, done!
Art in motion! Well done.
Awesome job!!! Impressive result.👏👏👏
Beautiful workmanship 👍.
this is genius ,, you did something really cool AMAZING it seems to be a runner
Fantastic engineering!
Complimenti, very beautiful work
Beautiful work!
Nice! Always loved the Cox engines!
Wonderful effort! Very impressive.
Einfach nur klasse!
Congratulations. I thought I was in for another " look what I drew and got the cnc to make me" very nicely done. I like the supercharger
Thanks!
Un grand bravo! votre travail et votre savoir-faire sont tous les deux fantastiques, extraordinaires! Encore bravo pour ce magnifique moteur en étoile! Thibault
beautiful project!!
Great work! Can't wait to see and hear a V12 version of this!
That would be awesome.
I will work on a V4 or a V6, V12 it's a massive engine for an RC plane, I rather do it on an actual sized engine
I love everything about this. Even down to that kick ass Swiss VictorI knife.
Thanks man!
Good that the shape of the compressor rotor is hidden behind an aluminum case.
😂
Nein!
Hey! I didn't realize someone was doing the same thing as I am. My friend and I are working on this exact same kind of project!
A work of art I should say a running work of art
Thanks!
Excellent project,
Superb looking engine A+
Wow fantastic!
Totally awesome mate 💪👍😄
Great job 👏
Это превосходно!
Не просто прямые руки - а золотые!!!
Побольше бы таких интересных видео и материалов в интернете а не всякие там котики или глупые челленджи....
УСПЕХОВ тебе МАСТЕР
Thank you!
Sounds great. Those little cox motors were fairly agrivating as a kid. Maybe it was the kid part but the multiple cylinders sure seemed to smooth them out.
Brilliant!
Awesome! A 4cc five cylinder radial engine! Instant subscribe!
Thanks for the sub!
Excellent video
Nice job mate well impressed 🤙🤙
Very nice!
Now that's very cool...
put this beauty on an plane!!! its awesome!!!
Où puis-je trouver ce design mon ami .. si possible répondre
Give it a shot in air, will love to see it fly
Die guten alten Cox-Motoren! Hab auch noch 2 PeeWee zu Hause. Tolles Projekt!
Danke! Die PeeWees sind lustig. Die kleinen Wurfgleiter von Multiplex gehen ganz gut damit ;)
@@christiansprojects-cgmanuf1426 hi I want to know if you can make me one like this is pay u to make me one
beautiful.
Very nice work. You are very talented
Thank you!
Impresionante,felicidades,muy habil.
Thanks!
really cool AMAZING
Really well done. i love the idea with the compressor. i have built the V2 20ccm from VTH verlag but it has problems running. maybe ill give it a try with the compressor as well
Well done!
Thanks!
obviously this is amazing.
AWESOME!!!!!!
Fantastic work and no cnc used !
Very nice.
Amazing
OK this is absolutely amazing!! really 👍👍 thumbs up 10 out of 10
Instead of the music I would actually just rather hear you talking about the machining process maybe some of the parts that gave you some trouble or things that you may be had to do twice because you made a mistake but really absolutely astonishing great craftsmanship and I’m glad there are still machinist in the world
Awesome!
I would definitely buy one. The look of it is so cool
I like it!
Cool I saw a 5 cylinder home made cox radial bring $1,800 on ebay about 2 or 3 years ago.
very nice work... not easy to pull that off. all radial 2 strokes with a master rod need that air-fuel pump to work... technically not supercharged (you cannot supercharge/turbocharge a 2 stroke from the inlet side), but here the pump is required for transfer and scavenging to keep the crankcase at a positive pressure to the combustion chamber ...
Yes you can, it is done all the time, and up to 3 bar boost pressure even. Not in this small size though...
@@rigididiot you cannot boost a 2 stroke from the inlet side... when the crankcase transfer ports open up to the combustion chamber, the exhaust port has already opened letting the burned mix out. when the piston is at bottom dead center... both the exhaust port and the transfer ports are open, while the inlet port from the carb is closed. when the piston is moving back up the transfer ports close first... then the exhaust port last.
this is why we use tuned exhaust pipes. they provide a back pressure pulse of some of the air fuel mix that escapes out the exhaust port (pushing it back into the combustion chamber) just before the exhaust port closes, effectively adding more fuel air to the combustion chamber under pressure.
look it up yourself as to why you cannot effectively turbo/supercharge a 2 stroke.
@@renaissanceman5847 Aehm... I am a marine engineer, and having worked for decades with turbocharged 2-strokes (and with a degree in engineering) I seriously beg to differ...
Google "turbocharged two stroke".
The turbocharger acts not only as a charging device, but also as a backpressure device, resulting in some serious boost pressure (personally I have worked with up to 3 bar boostpressure).
@@rigididiot show me the link...
You could google it for yourself, way more convincing, but if you insist:
www.snowmobile.com/trails/polaris-working-on-turbocharged-2-stroke-snowmobile-engine-65385
www.snowmobile.com/blog/wp-content/uploads/2020/06/Polaris-two-stroke-turbo-patent-US20200182139.pdf
www.ski-doo.com/2021-whats-new-ski-doo.html
But you could also google for "MAN B&W two stroke" or "Sulzer two stroke"
Very nice job thanks for sharing
Good job, like 7
very cool build. I would try and use dave sullivan heads and better glow plugs and you may get the reliability that you seek. I remember using them with throttle rings on mine .....and I could slow em down to make the sound of an electric fan!!!!!! then open er up and let the black widow scream.
you deserve more views
I've got a few of these little motors laying around including ones that were 'Factory built throttalble'
Just curious, but have you made any further progress in putting this engine to use in an aircraft. I found your video posted on Cox Engine Forums dated Dec. 28, 2020. If you have, we'd all be interesting in hearing about your endeavors. Thanks for sharing!
Absolutely brilliant chap, Well Done. You need silencers or the people would complain, its like a symphony to me but others would moan! Is it all en 8 did you have to use any v155 on it?
Did you consider using the master rod assembly as half of a scroll compressor?
Nice work, excellent result!
Do you supply the project?
Very cool, amazing, nice. BUT...what is the power to weight ratio? Looks heavy. Looks like it would fit another cylinder. And yes, I'm a critic who would be hard pressed to build an engine that cool.
+1 Christian - Excellent project and had to leave a 667th like as _666_ likes has scary connotations. Haha! A suggestion is to try to find some earlier 1960s era Cox cylinders that don't have the horribly restrictive exhaust ports. The previous version had 2 large slots (one on either side) and were much more powerful than the anemic ones you have. I'm sure they would provide quite a power boost to your little radial. The trade-off would be they're much louder, which is probably why Cox revised that design way back when.
Merry Christmas from Thailand!
Thanks for your comment! That's a great Idea. I think these cylinders are still available from coxengines.ca
EXCELENTE SERVIÇO 👍👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻 🇧🇷
Very cool project!
I'm curious as to why all of your connecting rods float in the main con-rod carrier. Doesn't one con rod usually serve as a master con-rod to control the rotation of the con-rod carrier?
That is friggin cool....even the making of a tap was impressive in its own right....just curious what keeps the main bearing oiled, pre-mix like typical two stroke?
Yes, typical nitro RC-pre-mix with plenty of oil and some nitromethane to help cool the engine.
Lovely work mate, can I suggest a flat 4 next
Thanks! Why not... I have a few other projects now but a flat 4 is a good idea as it will be lighter.
Impressive build. What performance are you getting? What fuel blend are you using?
Would like to see the model you fit this to. Perhaps, a WWI Sopwith Camel, Waco or Stearman?
Hi. I have never measured rpms. I use a 30% nitro, 5% castor and 15% synthetic blend. If I get it to run more reliably, a Stearman woul definitly be an option.
5:50 "ein Schelm, wer Böses denkt" :-)
I think there would be a moderate market for such items. Especially for upgrading Guillow and dumas kits. Give it a shot!
My plan is to buy a cnc-mill by next summer and then, we will see ;)
@@christiansprojects-cgmanuf1426 If that ever happens, I would be willing to run glow fuel again (gasoline only nowadays) and definitely buy one.
Wow 👏👏👏
No way. Just came across my feed. Im half done with the same build. Never thought about supercharged tho....
Hi Christian! Congrats, great job!
Thank you, Leonardo. A video of your PC-6 Propeller will be uploaded the next weeks 😃
I would like to build a 5 cylinder twostroke radial to serve as a bicycle wheel motor. Are there other options for building the crankcase pressure such as using an impeller?
Those steel pistons should holdup well
1:05 I live in the not-metric part of the world and I wouldn't be able to find one either. Leroy Cox used a really bloody oddball threadform for those cylinders.
The taps are available but I paid $60 about 6 years ago.
i wanna see it fly!
There will be more videos once the spring arrives!
Christian where is your flying video please? How did you calculate what propeller it would spin?
Amazing work! Is sounds very smooth? Its there much vibration?
Thanks. Surprisingly not. It runs much smoother than a comparable single cylinde engine. It's quite heavy which helps and it seems that I got the crankshaft counterweight just about right.