Let’s get this straight, the engine is NOT LEAKING OIL. The fuel is a mixture of lubricating oil and a highly flammable component. In my day, the 1950s, we used castor oil for the lubricant and kerosene and ETHER for the flammable bit. In those days you could go to a Pharmacy, in England they were knows as just Chemists shops, and as long as you had a laboratory bottle with a ground glass stopper you could buy 8 ounces of ETHER. Some times the Chemist would ask what you wanted it for and you would say that it was for model airplane engine fuel, there was rarely a problem. The fuel was a mixture of equal parts Castor oil, Kerosene (Paraffin in England) and ETHER. The engine burned the Kerosene and the ETHER and the Castor oil was just splashed all over the internal moving parts of the engine. The Castor Oil was NOT consumed and was just blown out of the exhaust port and as others have said it ended up coating the front of the plane. I never had this kind of engine which was know as a Glow-plug engine, the battery was used to get the plug glowing until the engine started to run. Then the heat of the combustion kept the plug glowing without the battery, the fuel formula for these engines was slightly different from what I have described. My engines were DIESEL engines and did not require a glow plug, they did have a mechanism which enabled you do adjust the compression at the top of the piston stroke. This was always VERY TRICKY to get right and resulted in many banged up fingers as you had to adjust a screw at the top of the cylinder while the engine was running. Young fingers and propellers running at 8 to 10,000 RPM do not mix without PAIN. Good heavens all this happened almost 70 years ago, I can barely believe it. But it was GREAT FUN, my mother stayed in the house not wishing to see the carnage that she confidently expected to occur. Good job I never told her about the Gun Cotton that I used to make. I used to test the quality of the gun cotton by placing a small amount on the concrete floor of the workshop and hitting it with a hammer. SPECTACULAR RESULTS, until one day the gun cotton literally blew the head off the hammer which then crashed straight through the glass of the workshop window. I do not remember how I explained that one. Best wishes, stay safe and thanks for the memories, didn’t someone else say that?

Watching this brought back a flood of memories. For a moment I imagined the exhaust smell coming from my cox .049 plane as I would tune the needle valve before running out to the control line to put it in the air.

As a kid, I played around with these engines all of the time. I really enjoyed tearing them down, and rebuilding them. I had control line airplanes (Cox, and balsa models with the Cox engines), a Cox 3-wheeled motorcycle, and even a flying saucer with one of these engines.

My hair, my clothes and body used to reek of the exhaust from these little engines. Just hearing this video, I can smell it again! The summers I remember most.

Took me back 50 years. Finicky, oily, dirty...best smell ever!

The cutest manliest toy I've ever seen

I still have two of them. A Peewee 0.020 and a Teedee 0.049. Have not run them for many years. Crashed many of the plastic ones and balsa control line models as a youth. Had a 0.049 Baby Bee with a tank extender on a 36" wingspan model and with a full fuel load it flew in a huge circle and out of sight almost. When it finally ran out of fuel I guestimated it was up 3000 feet and glided straight North East of us and never found it. Still have two scars on my finger to this date. Those days were great fun for us kids and still remember that last flight.

I'm 19 and always was fascinated by models and RC stuff. My jaw dropped when I saw that and made the instant decision to get one. Needless to say prices have gone crazy but I got mine, runs very well and the satisfaction of owning such a cute thing was worth it. So weird to read comments of people who grew up in the 50s... I felt nostalgic of an era I wish I was born in !

So small you have to measure its output in ponies instead of horses

I remember these Cox engines as a kid. Even though I haven't had one in 45 years, just watching this I could smell the fuel and exhaust again!!! Cool video!

Now I can drive my hotwheels around!

What great memories this brings back!! I just wish you could transmit smell to us! Shortly after I would get it running, I was cleaning mud and debris from the engine, never mastered string flight! Thanks for posting.

We used these on small control line airplanes in the late 60's and early 70's. Lots of fun. The .049 size was the most popular small engine. Then we moved up to .35 .40 .60 ect. Had to wear leather gloves to start them. Nice childhood memory. Thanks

I remember building a small sled out of my Erector Set back in the 1950's. I put "outriggers" on each side. A thin layer of sheet metal gave the bottom surfaces a flat area. Then I took one of these Cox engines and mounted it on the back. (Think "swamp boat pusher"). I grew up on a farm so I had plenty of outdoor space available. After a snow, I would put this little contraption down on some hard-packed snow and it would go like the blazes. I had not considered the possibility that one of the outriggers might catch in the snow but that is what happened. That turned out not to be a bad thing, however. When one of them would snag on a little high-spot on the snow, it would immediatly spin my sled, sending it off in a new direction. Do much fun! Thanks for bringing back the memory! 😅 😂 🤣

Never a doubt in my mind, heck yeah they will work. Great vlog, thanks for sharing! Got one in my shop now, but, hasn’t been in a plane in over 10 years. Learned along time ago that easy does it on tightening stuff on a aluminum engine, whatever, easy does it on the torquing. That spring starter saved a bunch of fingers!

I too remember taking these engines apart many times as a lad. I was baffled then (and now) how the fuel air mixture being scavenged into the crankcase found its way to the combustion chamber without benefit of 2 stroke style transfer ports. Thank you for posting.

"the battery was used to get the plug glowing until the engine started to run. Then the heat of the combustion kept the plug glowing without the battery" ... a pessoa q teve essa ideia é um genio ...

Oh yeah the little Cox that could! It was the workhorse of my model airplanes, dune buggies, and VWs I had as a kid.

I have same one. I bought in 1998 with my Cox Line Control Plane. Good times. Great video! Keep going!

Back in 1975 I used to have a COX PT-19 Plane that had similar engine, 0.049 cu-in with a glow plug and same spring starter. The flying model had control line. Good old days 😌

Of course, these engines work, I have used them for 40 years! These were the first engines made using CNC Machining in mass production. Many model airplane hobbyists started with engines in this series. The most popular being the .049 displacement series. 0.010, 0.020, 0.049, 0.051, 0.090. 0.15 displacements were available. There may have been a 0.074 even. There were even Conversion Heads available

I had one of those on a U-controlled Stuka back in the 70s. Had a ton of fun with it.

I haven't ten move for years. This video is getting me to want to rev the little thing up again.

never had an 010 but brings back fond memories of the 049. those were the days!

Hello friend, I am 79 years old. Since I was 15 years old I am a model airplane practitioner in all its facets. I started with “circular flight” and currently I fly everything that flies; motor sailplanes, sailplanes without motor, glow motors, electric motors, glow and electric helicopters. With 65 years of modeling, I think I have nothing left to discover. When I turned 60 I took out the ULM pilot title and flew successively in Quick Silver, Tecnam P92 and Tecnam Sierra. The doctors forced me to fly with a security pilot due to cardiac issues and desperate, I left him selling my Tecnam Sierra. I only fly model airplanes and, by the way, with all the experience accumulated last September 13, a Sukhoi propeller cut two fingers at the root of my nails. I know very well the stories you tell me because I have lived them. Regards.

I had a Cox .049 and a .15. Great fun!

These little Pee Wee engines were so easy to work on and started with just one spin of the prop. Adjusting the engine speed was a simple turn of the screw next to the fuel filler pipe. We also fitted them to flat bottom model boats and had great fun...

I purchased one of these .010 when it came out, still have it, mine is red. There is also the mount for external fuel tank. My father was ham radio operator and we built small radio control plane. It flew long time with that engine. Thanks for good video.

I had a few of these cox .049 aircraft and car engines when I was a kid. Very reliable, but fussy when starting, and idling, but would run all day with plenty of model engine fuel. Most of them didn't have a carburetor, but a Reed valve in the fuel tank with an adjustable pin for fine tuning. This is an improved model with a carburetor.

Worked all summer in the strawberry fields to pay for my model with a cox .020. Got a whole half lap in the tennis court before the crash.

Puts a smile on my face. Cox 0.049 - great memories.

Amazing little engine. I had a Cox Pitts Special control line biplane that I flew in my basement and outdoors many decases ago.

Reminds me of my Frog 80, circa 1966. Only my little engine was diesel, (no glow plug) and it ran off an ether /oil mix fuel.

Excellent video. I remember the Cox range of model motors in the 50's. They were brilliant for their cost and performance. I've still got a couple of Pee Wees and a Medallion 0.15 up in the attic somewhere. Must get them out.

OMG I had couple of these on 70's COX 0.10 , 0.20 and 0.45 thanks for sharing

I was playing with it 25 years ago, and it's coming out here now.

I bought one of those right after they came out, early 80's as I recall. Sadly I got sick and was off work for about a year with no income, so I had to sell off all those things just to survive. I WISH I STILL HAD IT!

Memories of my old COX 0.049. I had a few of these in the early 80's. I had a COX R/C van with the 0.049 motor. You could steer the van via RC but no throttle control via RC. Those were really fun days with my big brother. 40 years later we are still running nitro on road RC cars with each other and now our grown sons are racing with us. Great memories, thanks for posting.

In 1967, it was powering my circular flying model plane. Thanks for the souvenirs. 😍

I can't remember seeing this particular engine as a kid but I can remember the PeeWee .020 engine. Some great memories. Thank you for that.

childhood memories!!! the planes, the cars and the always burnt out glowheads!!!! lol wouldnt trade a day of them tho!! Oh and the smell of castor oil....great video, can almost smell it running!! thank you for sharing.

Had one of these in a Cox PT19 flight trainer fbw decades ago :)

I learned to fly Ucontol on .049 size engines when i was 11-12yrs old. Great vid. Takes me back when kids had hobbies! This is very cool…

Amazing, good job. That's crazy small!

I had a .75cc diesel when I was a kid. I took it into the cinema and ran it for about ten seconds during a film. I never got caught.

Still I have the Cox 0.049 that I used 50 years ago with a little U-control plane I made witk balsa wood. The only thing that that plane had doing was flying in circles surrounding me. After few minutes , the fuel finished and the plane landing, fully dirty of oil. Today , no child is happy playing to that. Regards from Argentina.

Loved these little screamers. Used to fly them in the '60s free flight in Victoria. Had to start them with the spring, if you tried to start without it it could start in reverse!

Even got one in my garage right now. Used it on a glider. The standard 1/2a model airplane engine .049 c.i. The one I have is smaller, it’s an .020 cox brand. The engine I have was just to get the plane up. Love that small starter spring, sure saves a bunch of sore fingers. These small engines are great pieces of engineering. Love them. Great video, thanks for sharing! I’ll sub and high five!

I put one of these on a $5,00 Styrofoam glider from walmart, tossed it around a bit without running, to set elevator & balance, fired it up, and off it went, up into the great blue yonder. found it in the cornfield 2 miles away... (was an 040)

At 5:05 love the simple glo plug powering. That was always the problem when I was a kid. Flat batteries. This vid shows me how far battery technology has come in 60 years (Oh dear, that long!!!?)

Of course it will work, you're the imaginative guy!

I just saw this for the first time I'm 57 years old and I have alot of these types of engines,cox,testors, wen Mac. I've got p40 Warhawk and a p51 mustang (testors) brand I was partial to them. I got cars and now I'm going to pull them out thanks to this video and maybe run them. Thanks for the motivation!

WOOOOOW!!! AWESOME!!!!

Excellent video, very well done too. Thank you : )

I had remote controlled cox cars with that kid of motor in the 70s. The were powerful and loud. I loved them👍

There was a smaller one, I have one NIB. The 010 was the smallest used in their plastic commercial planes like the Lil'Stinker Bipe. My favorite in the Cox line. I just found my box of 1/2A engines and a box of new glow plugs. I use them on gliders to get the altitude. Fuel is Methonal Alcohol+Nitro Methane+ Castor Oil. There are different blends but I use 15% Nitro with 18% Oil in all my engines. As long as these engines aren't rusted, the crank, then they will usually clean up and run.

“Because I know, ~somewhere deep down in my heart..... I still love you~” 0:03

The little .049 was a great engine used on model planes in the 50's & 60's. 👍👍👍 Glow plug ignition, then it ran like a diesel!!! Sure did get a lot of "whacked" fingers!! 🤕😨

i had a bunch of these cox engines for my airplanes when i was a kid, .049, .020 and .010 sizes. i can still smell the burning fuel now, they were alot of fun.

Nice. I'm old enough to have owned a handful of these little cox engines both glow and diesel. Most you can flick start without the spring and when you get a real feel you can make the 49 four stroke on a very rich mixture. Happy days.

awesome little engine

Switch music off when engine runs.

I have a great little .010 i fly on an old timer design balsa wood and tissue paper covered free flyer. It has a little mechanical pinch fuel cut-off and a fuse activated elevator pop up link that brings it down after a 5 minute max on a 30 engine runtime limit. I've had to go after this plane with my car in good thermal conditions, but I have never lost it. Walked a lot of corn and soybean fields to retrieve it over the years. Good little video, brought back a lot of flying memories.

No one talked about it was the cox dune buggie, 0.49 with pull start. Spent more time getting to run then I did play drive it. The worm gear made it to slow for me. Thanks for the video brought back memorys.

It is wednesday my dudes 0:03

정말 대단하세요....깔끔한 영상 구성에 ....제 오래된 콕스의 기억을 살려 주셔서 정말 감사 또 감사 올립니다

How wonderful! I had a Cox model of a P51 mustang with the .49, it needed EXTREMELY LONG guide lines. I carved a "line car" out of balsa wood and had to spin the .49 backwards to drive it. What fun! And just like that! POOF! Im 10 years old again.

This creative thinking is amazing, I too working on the same thing and your ideas are very crucial to me

Correct fuel for this the Cox TD 010 glo engine is 30 % nitromethane, 30% degummed castor oil and 40% methanol. Same fuel for all Cox TD racing series engines. TD glow heads all rated at 1.5v but TD's can usually be started on 1.2v. First series TD 010's had gold anodised crankcases and red plastic moulded parts. Second series natural finish crankcase and black plastic parts. Very good idea to disconect the fuel tube from the tank's plastic outlet before storage as the chlorine released from the tube material over the decades will attack the acetal tank material. Common TD 010 and 020 problem.

I can still smell the fuel we used back in the early '70s!

I still have one of those somewhere, fantastic little engines.

Winding back just 1/2 turn is enough for starting , to prevent damage to the string also let the engine do the combustion. Thanks again for sharing

That small airplane motor has been around since 1955! It’s nothing new or spectacular. What he does here, my friend, Dale, and I used to do this on a weekly basis. And when anyone buys one, buy a half dozen(6) glow plugs, don’t ask! And we had sore fingers from starting it, we had no spring starter, great invention. And they make a great battery clip for starting, but this guy evidently likes hot fingers.

Thanks for the memories. Use to have a Baja Bug with a Cox .O49 in it. This was back in 1974.

I used to play a lot with these when I was a kid 50 years ago. They were sold under the brand COX and you had several size of them....

I regret selling my collection of COX motors. I had that one, along with many of the famous 049, and a bunch of really rare motors including 2 small diesels. I used to slice and dice my fingers getting them started, but it was worth it.

Someone needs to make these and sell them as diy kits that would be awesome

They have been around since I was a kid---years and years ago...neat little machines!

A glow plug, Cox .49,! I had many of these! I had 12 model " fly by string" airplanes. If the " strings" weren't long enough you had to spin around very quickly. You needed a lot of room to fly them. Wow, this brings back memories! That sound, my mother insisted that I didn't start them in our backyard. In later years I got throttleable 1 inch, air craft motors for radio controlled flight. I still have 2 of the .49s. The Cox "golden" .49s motors were especially prized.

Every boy had one in the 40's -- 50's .010 - .020 - .049 - .074

I'm built a plane called Tweety Bird that ran on the Cox td-10 screaming at 27000 RPM LOL

Fantastic !! COX .010

i had an engine like that once , came off of a plane on a string , pretty cool old stuff

I have one of these engines Cox 0.20 hold it in my hand an run it. Also have the the Cox 0.049 as the one in the video. My engines are 55 years old.

Looks like the old "Busy Bee" glow plug motor that I once had.

Mounted one of these on the nose of a huge styrofoam glider. No control over where it went, but it was glorious as it flew in graceful spirals above the mall parking lot. Fun times.

thats a nice add on for the summer :D

Bonitinho tudo que é pequeno é da hora eu gostei da música e do motorzinho também kk

In the 60s I had the car, plane, and dragster. The dragster was cool: hammer a nail into the asphalt. Tied a string to it. Looped a string through two grommets, one in the front of the dragster, looped into the front grommet. Then stretched a string as long as you wanted (about 100 yards for me). Nailed a second nail into the asphalt. Stared the little Cox engine. Zoooooooooooooooooooooom it zipped abought 60 mph down the road, guided by the string to the end.

I have 2 of these Cox 010 engines new in original boxes. One is red , never run, in a plastic case and the black one which is test run only in a cardboard box. I have other Cox engines and over 200 various rare diesel engines, some 'Mills' going back to the 1940s.The ether kerosine (parafin) and caster oil smells lovely. It reminds me of my control line days in the 1960s. More fun than a smart (dumb) phone.

Finally found a motor to replace the rubber band in my balsa wood glider from the 5 @ 10 !!!!!! Totally Awesome !!!! Great Job !!!!!!

Wow the smallest carburetor I've ever seen. Smaller than my Testor engine back in the seventies...

Best sir ...any online shopping link is there to take this model.

A common Cox .010 engine, very powerful for it's size, they run fine and flew models like the Ace "Littlest Stik" very well.

I built lots and lots of model planes when I was a kid, starting with the .049 cubic inch displacement version of the motor in this vid. I eventually graduated to making control line tethered models with engine about 7 times bigger, .35 cu. inch. I learned a lot about building them and by that time I no longer made them from kits and even had a couple of my plane designs published in model airplane magazines including Aeromodeler in England even though I was just a kid in Canada :) All the motors I used were 2 stroke with oil in the fuel for lubrication, just like chainsaw engines still in use to this day....which are air cooled 2 stroke engines. I guess the peak of my model building "career" was when I flew at the world championships in 1984 in the racing event. Those engines were of the type that burned kerosene and ether as mentioned by others in this comment section. :)

It was designed to work! I had 0.010 and 0.049 Cox for my U line planes.

is it possible to assemble multiple of this engine in parallel to produce bigger power?

Wow, that was really cool!

I think your right Howard.----- I can almost hear the fumes. LOL.

Nise work sir