I Make This Tiny 2-Stroke Engine From Scratch

Patreon - / jellyfishmachine
In today's video we are going to make and run a very small, 0.1cc model airplane engine. Thanks to Richard Gordon for the designing the engine and making the plans available!
Some of the tools and supplies I use:
These are Amazon Affiliate links and i will recieve a small share of any purchases.
Sherline Lathe - amzn.to/4cnme7Y
Sherline Mill - amzn.to/4eVRay6
Hand Tools:
Diamond Sharpening Stone - amzn.to/3xFinnI
Files - amzn.to/3ziPSg4
Watchmaker's Screwdrivers - amzn.to/4eKxfSw
Dumont Straight Tweezers - amzn.to/45QGXPo
Dumont Curved Tweezers - amzn.to/3VP45ZM
Magnifier Loupe - amzn.to/3RRvMjr
Jewelers Saw - amzn.to/45TWAFK
Saw Blades - amzn.to/4byOIuA (1/0 - 3/0 for this type of work))
Precision Tools:
Steel Rule - amzn.to/3Y41jmr
Dial Calipers - amzn.to/4bt2O0a
Dial Indicator - amzn.to/3Wf3G4x
Indicator Base - amzn.to/3zm0fjj
V-Blocks - amzn.to/3VKuPun
Odds And Ends:
Anodizing Dye - amzn.to/45IUMzj
Loctite Retaining Compound - amzn.to/3XGpy9W
Oil Bottles - amzn.to/4bpYI9a
Editing Rig:
Computer - amzn.to/3zpG9Vs
Monitor - amzn.to/4cz7iUa
Headphones - amzn.to/4eMtgFe
Some Very Useful Books:
Watchmaking - amzn.to/4cz6bns
Toolmaking - amzn.to/3XN59jG
Clock Repair - amzn.to/4clBe6B
Autobiography of a Superhuman - amzn.to/3VTDR8K
Practical Watch Escapement - amzn.to/3RNNXGR

[@JellyFishMachine]

Sorry about the audio glitches in this one, I watched the video through in the editing software and it was totally fine, the glitches happened in the final render. apparently this is a known issue with the software that i use, go figure. i'll fix it for the next one.

[@danz409]

thank you. good to know my computer isn't having a stroke.

[@arnearne12345]

i was gonna mention it but you already got this under control and BTW absolutely fantastic build

[@ddoherty5956]

Beautiful work👍🇬🇧

[@markawbolton]

Dont sweat the petty things .... your voice is great and the Narrration makes sense and is appealing. You are dong great ... Subbed .

[@TheMegaloYT]

I am so glad you posted this. It was driving me crazy thinking my graphics card was finally giving up the ghost. 😓 Sorry that happened. Very enjoyable build and video otherwise.

[@wafikiri_]

So, it took you three days to get the engine started? When I was 13, in 1968, I was gifted a 0.1 cc engine, the Thimble Drone model, very similar to this one. The user manual said to turn the carburator valve screw about 2 or 2½ turns. It took me two years to get the engine started, when, out of desperation, I systematically tried all the valve positions in increments of ¼ turns. It finally started when the count was 12½ turns.

[@pauls5745]

wowzers that must've been so many attempts!

[@tauncfester3022]

If it was the Cox 0.049 with the aluminum fuel tank/engine mount they had a bad habit of gumming up the needle valve and fuel-line pickup from old Cox fuel. The best way to deal with it was to backflush the needle valve by taking a fuel syringe with a bit of silicone fuel-line on the nozzle, remove the spring and needle valve and give it a healthy squirt down the threaded hole the needle valve lives inside. better than taking the whole tank apart just to flush the gunk out. You also need to annually take the tank back-plate off and clean the old gum and crud from the bottom of their tanks.

[@wafikiri_]

@@tauncfester3022 Yes, it was that type of engine. And I had to build the fuel myself, which ended up being very expensive because of the ricine oil in the mixture, that I got from a pharmacy (my country had nearly no model shops those days).

[@Demotricus]

I lost interest in diesel engines when I bought one in my youth, (I forget the make, - it was 50 years ago lol), and ran it in, mounted in a vice attached to a wooden stool. I left it running and it was sounding sweet, - too sweet..., it overturned the stool and snapped the crankshaft..😩 Just a dumb mistake, but to a 15 year old, ....devastation.

[@wafikiri_]

@@Demotricus The Thimble Drone wasn't a Diesel engine.

[@rexmyers991]

The smallest engine I ran was the Cox .020 but mostly the .049. I developed a method of starting that used a hypodermic needle and syringe full of fuel. I could get them to run on fuel squirted from the needle into the exhaust port and then adjust the needle vale until I got the mixture correct. They would just scream. Lots of fun for a 13 year old. I am 81 now. Great memories. EXCELLENT workmanship, Sir!

[@kevin34ct]

I still have an .049. I also have a .15, both aircraft engines. I have a .25 RC car engine.

[@terryvickers5986]

Cox also made an 0.010 engine. It was used as a tie clip in a picture I saw.

[@user-qu8cx3tf1w]

I remember those TOO well !! That needle valve is VERY CLOSE to the propeller though !! Bit my fingers many times ! 😂😂

[@wtmayhew]

Cox made a dune buggy with an 049 engine. It was a pretty forgiving engine and similar to the model aircraft engine. My dad and I modified it for R/C using a Heathkit 5 channel digital propo system on 27.095 MHz which we built from kit. We only needed two servos for throttle and steering. That was a lot of fun to rod around on the street. Those were the days of messy castor oil fuel, no. 6 igniter batteries and large electronics. Now everything is small, Wi-Fi and electric propulsion, often with a first person view camera on board. A lot changes in 54 years. When we first started model making the single channel receivers still used vacuum tubes controlling rubber band driven escapements. If I only had the machining skills shown in this video…

[@tauncfester3022]

I owned the TD "0.010 which was considered the smallest American production model engine. One of the neater models I flew with it was a Monowing, freeflight "helicopter" that was like a powered maple seed. It actually flew under power well, but would plummet like a rock when the engine quit.

[@Thrillrider10]

Do I have any of these machines? No. Do I have any plans to acquire any of these machines? No. Do I even have any knowledge of how to machine these things? Definitely not. Did I invest 32 minutes of my life to watch someone make one of the tiniest engines I've ever seen anyway? Absolutely. Great video, man.

[@muslimsgotohell]

Agree, but the 2. machines tool looks like not properly centered.

[@33rorynoah]

I totally agree, a wonderful video. This guy is an absolute genius!

[@Splarkszter]

You can start machining with wood :)

[@thatwierdbilly]

@@Splarkszter an engine wouldnt work made out of wood

[@Splarkszter]

@@thatwierdbilly What does that have to do with learning to use a tool?

[@bigoledave5718]

I once glued two popsicle sticks together! That anyone has this talent is really impressive to me!

[@Kim_Miller]

Wow, this took me back. I'm 75 and as a teen in the 60s I used to fly control line planes with an engine like this. Here in Australia the popular engine was the Taipan and all I could afford was their 1.5cc model. It looked very similar to yours here, and was their smallest I think and enough for about 20 inch wingspan plane. When I left home for university my mother emptied out my room and everything disappeared. Some days I'd just start the engine for the pleasure of seeing it run. As an old bloke I'd probably do the same now. 👍

[@JellyFishMachine]

I take mine out and run them about every other week lol. Thanks for sharing!

[@iconoclad]

I'm 76 and I too had a Taipan in Australia. It was 2.5cc. My fuel mix was equal parts of castor oil, kerosene and ether. Later I had a much smaller diesel engine I used on a free flight. My glow plug engines ran on castor oil and Shell "racing A" fuel ordered specially from the servo. My best engine was an Enya 5cc "3B super typhoon". It lapped competitors 6 laps to their 5 laps in the team race competitions. Fun times. Sorry your Mum junked your stuff, they just don't get it.

[@markawbolton]

Aeroplane were out of my reach and Radio Control was something only the local Doctor could afford ... So we bout a sawmp boat out of fence palings and sheet tin ... And axe handle for the engine mount ...the 1.5 cc desal I was given by one of the older boys was damn near impossible to start since it had no compresssion left .. But it didnt sink and went like stink scared the ducks big time .... Probably some still in Trauma Councilling in Traralgon VIC ~quack~ .. Cheers MAte ..

[@adoreslaurel]

On Ebay, I bought two OS Max engines a few years ago to relive my youth, both had the same typical 2 stroke problem, get them warm and the cylinder expands too much and there is not enough compression to create a vacuum in the crankshaft area,too much blow by, only restart when cold [had same problem with a BSA Bantam], tried to turn up a new piston but I think the bore is not true enough, am going to try and true the bore but doubt the accuracy of my tired old WW2 lathe.

[@markawbolton]

@@adoreslaurel A BSA Bantam was the first motorised ride i ever did solo .... along a beach ..I was 13 ...

[@mebobtheone]

I'm a retired machinist, I used to machine large 18' dia x 36'' Chilled Iron mill 1,800 lbs. rolls. I say this because I've always been fascinated by how small intricate machining was accomplished. I was hoping though that you can call out more specs on such things as the interference fit and tolerances for cylinder bore and piston fit etc. to fully appreciate the precision of your craft. It was a real joy to watch all your steps, thank you for sharing.

[@poetac15]

I love that within our industry there is such a divide between micro and large format machining. When I have to use a 1/16 drill I pucker but I know that’s huge for many machinists.

[@blainehebert1376]

What seems to be missing from this video was the careful measurements of the parts as they were machined to exact specs.

[@OffGridOverLander]

Considering the tolerances for interference fits on larger stuff than what he does, I’d guess it’s somewhere near .0001 to .0005. I would certainly like to know the tolerances as well.

[@F-15_Eagle]

At the vocational school I attended, where I majored in mechanics, there were lathes and milling machines. One of the students in the class above me made a piston for his aircraft engine (assisted by the teacher). He then installed the new piston and started the engine. I was very impressed with the accuracy of his work. I watched your video on creating an engine from scratch. Man, you are talented! 👍

[@andymodeller965]

Male jewellery - as a modeller - and retired mechanical engineer - this video really is a masterclass in what is possible with the correct skill. Superb. 👍

[@EgorAfonin]

Очень подробная и интересная работа. В видео такого формата раньше не хватало обзора детали, которую изготавливают. Спасибо за ваш труд!

[@gregmead2967]

This brings me back, too. Back in the 1960s (I'm currently 68) I had the Cox .01 cubic inch motor, and it would spin a 3" prop at 27,000 rpm (advertised). A great little, reliable engine. I ran it many times. Sold it and a bunch of other small engines years later, and I've always regretted it. The .01 engine could have been used as a tie tack. Oh, I still have an Enya .15 engine, but haven't run it in ages. Maybe as I approach retirement I'll have to get back into these.

[@CATech1138]

i have a Cox .010 new in box....trying to decide which micro plane to build for it

[@Irate_Beau]

PLEASE call it the Teeny-Tiny Two Stroke! it rolls off the tongue so nicely, i just wanna keep saying it.

[@JellyFishMachine]

You are a genius.

[@JellyFishMachine]

100% going to use that when i redesign it smaller.

[@gregkretchmer3588]

I built a slightly larger engine but the piston fit was slightly tapered to make it nice and tight at the top of stroke. Fuel was U.S. diesel fuel, castor and "engine start" ether. Fresh ether for each run. Iron piston and steel cylinder. Crank to case fit was critical to stop compression leakage back to the carb and out the front. I used an electric starter, which causes the engine to warm as it spins over while adjusting the mixture and would start and run well. Running was extremely slimy. I used single transfer port and single exhaust port. My carb had an "o" ring and two clamping screws to seal it and hold it on. I've seen diesels with throttles that actually idle. Most of life is just showing up! Nice choice on Shureline.

[@rickharriss]

Yep the mess was unbelievable but the smell of burnt Casteroil Mmmmmm yummy.

[@soundman6564]

Geeze, that brings back memories of the control line planes with the Cox .049 engine. 👍

[@jeh45345]

Yes! I can just about smell that fuel burning from my dad's control line planes.

[@mrbmp09]

Cox engine were super easy to start. I returned 8 testors brand engines in 1 day, none of them ever fired once.

[@affektivmusic]

Im a producer as a hobby, but welder/blacksmith as a job and this level of craftmanship makes me so absolutely happy! well done!!

[@vlupis1]

this should have 1 million views!

[@kevin34ct]

Kind of tough with only 3K subscribers. I know that doesn't really matter, but you can base the amount of views off of the subscriber base.

[@SHKEVE]

it’s at 150k in 4 days. it’ll probably get there

[@Lukas-cp3qx]

@@kevin34ct6k now

[@jeffmccrea9347]

It never ceases to amaze me how these machinists know just where to remove metal from a bigger block to find the part that they needed inside. They must have X-ray vision to be able to tell which block of metal contains their part inside. My hat is off to them! All kidding aside, when he first started with the lathe, I thought that it was much bigger until his hand entered the frame and gave the picture context and perspective.

[@nickphipp1949]

This video brings back so many great memories for me. My late father in law (a partially-sighted master toolmaker and engineer) built this engine after seeing it in Model Engineer. I believe it was called as a Nano Engine? However, Dennis (in his late 70s) built it at half scale! Finished size was around 3/4" long, including the propeller hub, if I remember correctly. All turned and milled on machines he had designed and built himself. According to his strobe, it ran at 20,000 rpm. 😁 It certainly squealed. I know I'm biased, but he was a mechanical genius. He once built a spark eroder (rather than buy one for £30k+). The first time he tested it, all the street lights within a mile radius dimmed. 😆 However, he could 'erode' any irregular shape he needed through 1/4" steel. He also designed and built a working V6 engine which would fit inside a matchbox, and a very 'revolutionary' flywheel assembly. Imagine a flywheel with a driveshaft rotating at 45 degrees to the face, with a ball bearing end actually inside the flywheel, tracing a circular path, like a spoon stirring coffee. This was only two pieces of steel, and nobody could work out how he made it. Thanks again for the video.

[@joeteejoetee]

Very impressive! In the 1970s, I finally convinced my father to buy me a Cox 0.010 engine (because it was the smallest and safest!) for my birthday. We got it recoil-started in a vise a few times on that day. The next day, I decided to start it while holding it in my hand, and did

[@andersgrassman6583]

Great story!😊

[@numbr6]

I like your "anti-license strike countermeasures" during the engine assembly (with music) against YT. I hate YT for that! Amazing workmanship and machining work. Sorry this engine didn't run better. As a young child, I did mess with Cox 0.049 model airplane engines. My planes never flew well, but the engines ran. I remember they were very fussy to get running, and now that you mention the ambient air temperature, I never thought about the Chicago weather temperature difference affecting the running of the engine during the summer. I might just have. That was a long time ago...

[@philfrydman2576]

Yes very very fussy! I spent more time starting the engine than frying my model 😅😂

[@guestc142]

i thought i was hallucinating at <a href="#" class="seekto" data-time="1315">21:55</a>

[@myke49]

I was introduced to small "diesel" motors like this one when I was about 7 years old. The kid next door turned up with a 1.5cc Frog diesel. We made some fuel (ether, castor oil and kero) and eventually managed to get it running. I have been flying model aircraft ever since and am now about 75 years old. Your skills with metal are way beyond mine but I still like to play with small motors. Thank-you. Mike in Oz

[@arifkasim3241]

I always wished a person like you could teach a bunch of young kids how to make such engines so the hobby goes on.

[@davidarchibald50]

My father-in-law was a turner, he made some of the biggest threads and machine parts I have seen. He told of huge lathes he worked with in his apprenticeship and he also marveled at watchmakers who worked with the tiny. Watching this brought tears to my eyes for the friend and mentor who passed near 40 years ago. Thank you, it was beautiful to watch.

[@Mr.Postal]

The video is just very great. Its not loud its relaxing and the humor is that little mistakes in the editing.

[@steveguardabene4849]

Why are they using a four jaw chuck

[@brianworth3927]

In this case an independent 4 jaw is used, because you can position the hole accurately in relation to the edges of the block. A dial indicator is used to measure the amounts that the part moves when you adjust each jaw. Think of it as a milling machine lying on it's side. Once you have mastered the 4 jaw independent chuck, you will only use a 3 jaw for repetitive work. I used to be able to "eyeball" and centralise a round stock, and if further accuracy was needed, I would use a dial indicator.

[@truedinis]

Is it only me that gets sleppy watching this kind of videos? I swear it's so relaxing, kinda like ASMR and white noise ngl.

[@alamoone4465]

I was a biomedicall technician for 12 years glorified, machinist. I used some of the smaller machines you have to very large CNC milling and lathes. I also weld, Do heat treating and andizing Injection molding I even did some seamstress work. I did some tool and model making. A lot of skill sets that I don't have time and i'm sure you don't wanna read about. That being said I'm very impressed with your skill sets!! Yes , it was very satisfying watching your work.

[@redacted1946]

you are a machinist god. the first few minutes i was having doubts this wasnt handmade and thought it might be gcode. then i saw you making threads by hand.

[@JellyFishMachine]

I've spent my entire career running CNC machines, so i guess my handwheel turning tends to follow a similar style lol. Thanks for watching!

[@hermandegroot1946]

Sir, you don't have two right hands but four. Respect from the Netherlands.

[@autisticdrone.]

I normally watch Cutting edge engineering Australia, this channel is like a miniature version of it. Takes Great skill to engineer those miniature parts in a miniature lathe.👍🇬🇧

[@graemezimmer604]

I love your little engine, thanks! When I was a kid I was mad keen on model Diesels and Glo-Plugs. I lived in a remote area in Australia, so had trouble getting fuel, etc, until I learnt that the local Chemist (Pharmacist) would make it up for me. One day in desperation I discovered that my favorite engine would run just fine on two-stroke lawnmower fuel. I don't remember now if that was a diesel or a glow-plug engine.

[@tauncfester3022]

If you can get Anhydrous Methanol in gallon quantities and if you have a local motorcycle supply house, Klotz makes a synthetic castor mix that is frequently used in real model engine fuel. I think it's called Benol. Warning; Methanol is a poison and it's dangerously flammable. 25% oil to Methanol makes what is known world-wide as FAI model glow engine fuel. Also some pharmacies used to sell a 4 oz. bottle of Castor oil, but this was in the US.

[@Max-dk1ni]

<a href="#" class="seekto" data-time="1552">25:52</a> @JellyFish Machine The positioning of the propeller and piston is very important. You have set the piston "ZZ", the piston is at the lowest position and the propeller is horizontal. The propeller is a flywheel and has a very important role in starting and operating the self-ignition model engine on ETER. The mixture for running in the engine is 50% ETER, 25% kerosene, 25% engine oil, run in the engine at low speed and pause every 2 minutes to cool down. Once the engine has been run in and adjusted, use a mixture of ether 33%, kerosene 33%, engine oil 33%

[@generessler6282]

Wow. I had a Cox .010 cubic inch engine as a kid. This is 61% the size. Well done.

[@CATech1138]

i have one, new in the box

[@jamesburns2232]

The Cox .010 works well to provide engine power to Gillows rubber powered aircraft kits. 🤓

[@kenstevens5065]

Thank you for posting. I still have a disorted fingernail from injury sustained hand starting my ED BEE 1cc model engine in 1965. Enjoy your life folks, even if you live to old age it goes so quickly!

[@Computeraidedautomation]

The attention to detail and the way you explained each step was great.

[@WorldScott]

Just finished watching your entire build video. Excellent work both in making the engine and in making the video production. Typical for a number of builders on youtube is to include in the video description the tools used and materials (especially the tools). Cheers.

[@QueenofHuronia]

Memories of my 1st ventures into RC! Rudder only with a Cox .010, which was basically a free flight with yaw control. Had the old Ace Pulse using a Adams Actuator. Ah the fun of the old simpler days.

[@serpent77]

Like many others here, I started out with the little cox .049 Babe Bee engines. Used to take one with me all over the place, fill the tank on the back, hold a battery onto the glow head, wind the spring starter back and let it rip while holding it in my hand 😅 Fun times, and fun little motor!

[@colinbowler1104]

As a Sherline owner I’m really enjoying your videos. Not sure if I’ve heard any commentary on your earlier videos but I do enjoy it.

[@JellyFishMachine]

I continue to be amazed at how good the sherline machines are! on the commentary, i wanted to wait until i got the filming and video editing part more or less figured out before adding another layer to it - doing voiceovers is actually quite challenging!

[@gvet47]

I had the COX .020 and .049 as a kid in the late 50's. At 76 I would have trouble as my machines are too big. Just making your tooling and wow the threading! I would love to see the plans and the tolerances they expected. Did you have to figure out your own machining sequences. Very nice work! And I did have a CO2 powered engine I never see anymore. 👍s​@@JellyFishMachine

[@1962ralf]

It was very entertaining to look, great respect for your mechanical craftsmanship. Thank you

[@bolshoizmei]

Вы просто молодец! Когда то давно я тоже делал такой двигатель, это очень большой труд. Вы очень хорошо справились,поздравляю вас.

[@nishithrithnuka9078]

this channel is underrated

[@sladoled26]

Amazing,what a man can do!

[@greggfuller2220]

I've never been so captivated by a master Machinist, or any other engineered Contraption in my entire life . I'm a machinist myself and cannot get over the technique and dedication to this project.

[@guildedpickle4755]

Dude, you are a legend. I just wanted to let you know that.

[@jregns]

Wow, beautiful work! It threw me back to my teenage days (I'm 51 now) when I was hanging out with the "old men" (same age as me now 😅) at a nearby RC field, checking out their model planes with mainly OS MAX 15, 20 and 25 engines (2.5 - 4.0 cc) or Thunder Tiger equivalents. Sometimes, someone with a larger biplane and a 4-stroke would come by, or even a RC helicopter. Sweet memories! 🛩🚁 Greetings from Sweden!

[@kevinavillain4616]

As a machinist I absolutely love your work. Having been somebody that's worked with two-stroke racing for years you're on the right path as far as porting goes . The other thing is crankcase volume versus volume displacement behind the piston. The closer to <a href="#" class="seekto" data-time="61">1:1</a> the better. Just a headsup you're getting small enough that fluid dynamics of air may be changing going smaller.

[@alexandrevaliquette3883]

It's the first time I see someone doing free hand with a metal lathe. What a great piece of mechanical art!!!!

[@muzammalbaig]

Salute to all the ones making those drills, The machines and the chucks.

[@Demotricus]

Model Engineer was my dad's favorite magazine. (We still have boxes of them in the attic..). He was more into model steam engines and such whilst my hobby was R/C aircraft, this tiny diesel engine reminds me of my first purchase, a control line (plastic) aircraft powered by a Cox .049 cc Nitro Glo plug engine, (not the same engine but similarly tiny). Happy memories..

[@mozkitolife5437]

The machining alone was worth it. Just lovely.

[@pablomoralez4492]

As an owner of multiple Cox TeeDee 020 and 010's, some NIB, a few converted to 'diesel', but most in various drawers and storage boxes, I find this an impressive subject to attempt. Though honestly I'm much more interested in the last few seconds of your video mentioning a hope to attempt smaller. The 010's were a neat idea, and on the perfect day when the stars aligned could absolutely give a screaming and awesome performance in both sound and power, but in normal practice were 'fiddly' to the point of distraction. It was fun back in the day to spend the time to try to get one flying for the typical 2-3 minute flight, more to claim that it had been done than anything. I had a few friends into control line (and a few die hard FF) that were happy with their .020's, but, for R/C the more reliable .10 to .40's were really where the time honestly flying was spent. And, for those who could afford or were extra devoted, the .60 and up planes were a blast to watch and aspire to. I would really love to see a build attempting smaller than .010 though, even though the power to weight ratio means it's somewhat pointless as a powerplant, it would be amazing to see a .0025 engine actually run. I assume the prop would be a 1.25" ? And probably 100k rpm at full song, in the dog whistle exhaust note range? Now THAT'S a challenge!

[@JellyFishMachine]

at 0.1 cc this is slightly smaller at .0061 cubic inches, a bit of unit conversion wierdness. as far as i know the smallest running model airplane ever made is ronald valentine's .006 cc "Nano Bee" but there's never been any proof or video of it running that i know of. I'm looking for a few copies of "Strictly I.C." magazine that have articles on making glow plugs from scratch. i also want to try spark ignition too.

[@philfrydman2576]

Yes the sound of those engines when I finally got to start them!

[@kiketve2]

SIMPLY AMAZING !!! WITH THAT ENGINE YOU CAN MAKE ANY MODEL PLANE SHAPE AT THAT SCALE. HAVING MACHINERY LIKE THAT THE SKY IS THE LIMIT !!

[@miguelperaza6615]

This must certainty be the fuckenest awesomest video of all time ! Not to mention the careful constructive details and total precision that it demands , theres not enough words to describe the way everything falls into place , WITHOUT DOUBT, this person building it deserves the PULITZER PRICE ! 🎉

[@mrbmp09]

Glow plugs for larger nitro glow engines around. 15" and up use a standard glow plug size. It's 1/4-32 thread I believe, that might have fit your engine and they are much better glow plugs. Long ago I converted my .049's to use those. They were a LOT cheaper too.

[@JellyFishMachine]

Thanks for watching! It's hard to tell without holding it in your hand but this engine is barely bigger than a standard glow plug itself! the piston is 5mm (.197") diameter, the whole engine is 1-1/8" from top to bottom. I have used standard glow plugs in other engines, and i am building a twin cylinder that will use "turbo" style glow plugs.

[@aprilliac]

Great video, nice machining, and great jazz.

[@bobsoft]

That sound brought me back to childhood of playing with Cox airplanes.

[@JaredElliott1]

The outtake at the end was the best part! Love it!

[@hpodell]

I remember tying a rag to an .049 and throwing that in the air. This engine. A very small rag. Great video. You have the patience of Job. Thanks for a fun watch.

[@Ollisaa6095]

wow. that is cool! Now make one that has 6 cylinders and then build the Albatross DVA.

[@robertmatch6550]

Excellent calm commentsry and good machining skills. There is an incredible amount of experience, knowledge and planning behind the scenes. Thank you.

[@JellyFishMachine]

Thanks! With my professional machinist experience, making the parts is easy, so i can concentrate most of my effort on making the video.

[@reuben9213]

Really enjoyed your expertise with your lathe and milling machine experience . Enjoyed you making this engine .

[@stephaniefairey8633]

omg that tiny little tool rest is so damn cute i cant even - i loved this video and I dont even do planes or engines or anything

[@staxter6]

Made the same for an engineering project at Uni. Still have the scar on my index finger from the prop when it finally kicked!! That was 40 years ago, good lord how the time has flown.

[@mikes78]

Fantastic effort there. Even though I have neither the machinery or facilities to do so, it doesn't stop me wishing I could do something like this. Maybe some day, but not today.

[@paulmaxwell8851]

I'm in central British Columbia, Canada. I got rid of almost all my childhood toys and things over the years, including all my model airplanes. But I did save my small engine collection. I have a McCoy Redhead .35, a Supertigre .29, an Allen Mercury 1.5 cc diesel, a Davies Charlton 1.0 cc diesel, several Cox engines such as an .020, some .049s and an .09, and a Fox .35 RC that I bought brand new when I was sixteen. I think I paid $35 for it at Ben Hill's Sporting Goods in Victoria, a lot of money for me at the time. It has only been run twice on a test stand. I miss those old days, and this is all I have left; not even one photo survived the years. Great video!

[@CaptK-py8rq]

I bought the Fox .35 new in the 60's, from the hobby shop, I still have it and the box, just checked the box, it was $11.99. The motor's still on my "Voodoo" wing I built, we flew combat and cut off the opponent's streamer. I had a few of the plastic U-controlled planes that came with the Cox .049, the PT-19 flight trainer, P-51 Mustang, Ju-87 or 88 Stuka that you could drop the red bomb, these were all less than $9.00 each! For the whole plane, motor and accessories! Used the Mistle Mist fuel. After the plastic ones I built the rest from balsa wood and paper.

[@thisissoeasy]

Wonderful video! This was mesmerizing to watch... Excellent result!

[@joecnc3341]

Liked-Subscribed-Notified. Nice work! Great to see a Sherline Lathe in use, too

[@kalebarger6063]

Wow amazing machining. As a mechanical engineer in training with extremely novice machining capabilities this just amazes me!

[@herbfarmone]

I am admiring your patience. Great video Thank you

[@davidelliott5843]

Glow plug engines are essentially compression ignition. The hot wire is an ignition initiator but it’s on all the time. An engine with four cylinders equally space around the crankcase either all rods on one long big end journal would have zero vibration. It would need a high speed fan to feed air into the engine. Make the non-drive end of the crank hollow do mixture gets fed evenly.

[@user-zn6gz4ub7w]

I love to watch the process of machining steel parts. I worked in a machine where all we did was refurbish and sharpen machine tools for other machine shops. I must have sharpened a couple million end mills while I worked there.

[@Merc_0158E7]

<a href="#" class="seekto" data-time="1007">16:47</a> This upcoming part taught me something. Thank you!

[@DaliwolfBacon]

I found the video by accident, but I am so glad I did! It helped me understand what the different parts of the engine do, and how they are made. It was fantastic! I am so glad I watched!

[@FarmerFpv]

That is incredible. It reminds me of my little Cox engine that came with my Lazy Bee RC plane. You start it up, fly it as high it can go before the engine cuts out, and then glide it back down. It was lots of fun. Thanks for bringing back memories. You are good at what you do. You deserve many more subscribers.

[@JellyFishMachine]

Thanks! My first rc airplane had a cox .049 black widow, same type of flying!

[@autisticdrone.]

I normally watch Cutting edge engineering Australia, this channel is like a miniature version of it. Takes Great skill to engineer those miniature parts in a miniature lathe. I subscribed as I was so impressed. 👍🇬🇧

[@hohcomics]

Little trick with 2 stroke engines is to use automotive gasket maker to seal all leak points. Any leaks makes it hard to run since compression isn’t consistent. Also grease valve locations too with tacky grease

[@tauncfester3022]

On the little cox micros their tiny baseplate paper gasket is pretty important and isn't easily fixed with some gasket maker. The Nitro-Methane and Methanol both will destroy most automotive gaskets in a tube. I'd really be careful about letting something that could end up getting inside the crankcase make it's way to the cylinder and seize/ruin the fit of those tiny, lapped fit pistons. BTDT..

[@3DPDK]

Beautiful👍 Priming the cylinder with a squirt bottle or syringe is the trick when using the glow fuel. I think you are right though; the loose carb allows the engine to run too lean. The fuel entering past the needle valve depends on the vacuum in the carb throat. As the engine revs up, vibration of a loose carb body would allow air in at the joint decreasing the throat vacuum, reducing (leaning) the fuel/air mixture. Even the commercial .02 to .49 engines ran very rich. An hour of flying usually meant two hours of cleaning the oily exhaust off the airplane. Cox engines sold from the mid to late 50's on, used a fuel tank and carburetor combined feeding the crank case from the rear. It solved problems of cracked carburetor bodies and saved prop burned fingers because the needle valve was behind the cylinder - then fingers were only burned by hot exhaust.

[@VinnyMartello]

Today I replaced the battery on my iphone.I was shocked at the size of the screws. I can't even begin to comprehend how you machine something so small.

[@hinduwarrior123]

Amazing ❤ I remember using a K- Mills 0.25 cc "Diesel" (compression) engine as a teenager in India in the mid eighties and know how difficult it is to start these!

[@stevemccauley5734]

I have never messed with a diesel or glow engine this small. I do own a couple Thunder Tiger .07s & I’ve owned A LOT of glow powered RC planes & cars. One issue I see, especially after you converted it to glow power, is compression. Nitro engines have compression by the cylinder & piston being tapered. The cylinder is always chrome plated brass so it’s soft & the pistons are generally aluminum. They take a lot of gentle break in to work correctly for any period of time. Another issue looks like your timing could be off with the fuel port in the crankshaft. Though I think one of the biggest issues you had, you pointed out. The carburetor mounting that’s causing a vacuum leak. Still… kudos on the build. I couldn’t have done it.

[@mrshaneyt43]

I could have the best machines money could buy and a fully fitted out workshop and would guarantee I couldn’t make this ( and I was a steel fabricator) . This is very impressive and a joy to watch 👍

[@AAOFigures]

This separates men from the boys! Impressive work!

[@AnIdiotOutdoors]

I don't fly RC aircraft. I don't have the means to make this engine. Was I fascinated by this build? Hell yeah! This is freakin awesome! 🫡🫡

[@christophergaus3996]

I had a Cox .10 for my line control plane back in the early 90s, remembered that sound instantly!! 😊

[@equaliser2265]

Amazing workmanship and with All American made tools, no Chinese stuff here.

[@CaptK-py8rq]

...the lathe...

[@michaelchancey5505]

Amazingly fine craftsmanship, very interesting and relaxing to watch it all manufactured and assembled, thanks! Well done!

[@MegaTraxxas]

You are really talented and skilled engineer, thanks for our videos

[@BRUXXUS]

So happy this video and channel were recommended! Awesome project and very fun to watch.

[@QuantumPyrite_88.9]

Respect sent from an old machinist. I can see generating a CNC program for this project. Might take a few hours. Thanks and all the best.

[@loboheeler]

Compression ignition engines can be tricky to run, especially ones this small. Just like small glow plug engines need more nitromethane, small compression engines likely need more ether. Also important to use an octane improver like Amyl/Octyl Nitrate. The running cylinder temperature is also important. I found in my 2.5 cc engines, that the compression needed to be set higher for flight conditions, than what seemed right on the ground. I would ground tune, then up the compression by another 1/8th turn. It would be out of tune until the airflow cooled the cylinder. This worked the same for both engines of different makes.

[@deanatkins69]

I never thought little motors like these could be started without a glow plug 😮 very cool😊

[@murraydaniels3377]

they use a mix of 1/3 kerosine, 1/3 castrol m oil and 1/3 Ether as the fuel mix.

[@plummetplum]

Next level skills my mind boggles how you did this

[@jimmyguy428]

Great video! It was awesome to watch this whole engine come together. The smallest Cox engine was the Tee Dee 0.010 CID (or 0.16 cc).

[@stefanolassandro886]

Great skill and precision, congrats for the very complex project! ❤

[@blaggercoyote]

Brilliant! You are a clever engineer, especially as it was all done by hand!

[@DAS-Videos]

It takes some skills to make a tiny engine so precise that it runs. I used to love the Cox tee dee engines. They were loud but fun. And the novelty of a small nitro engine.

[@Phoenix-td8mu]

Genius! Now do a 4-cycle engine of the same size, with valves and T-belt. Are you up to the challenge? 👍👍👏👏👏👏👏

[@Terribleguitarist89]

Absolutely awesome stuff. I took drafting/design and machining classes as an elective in high school but haven't used those skills since. One day I'll have some machining equipment out in the workshop, until then I'll watch these vids 😅