1cc Diesel Model Engine Re-Conversion
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- čas přidán 6. 06. 2024
- Patreon - / jellyfishmachine
I initially made this engine as a diesel, and ended up converting it to glow fuel. In this video i converted it back to diesel, mostly just for fun!
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I love diesels build them most of the time but the small ones like more ether about 35 percent and about 2 percent nitrate I think it will start easier and run smoother Thanks for posting and keep up the good work
Yep, the stuff we sell for this size/type of engine is 35% kerosene, 35% ether, 28% castor oil & 2% Isopropyl Nitrate. Best to use proper 1st press castor, not the red Klotz stuff.
It was nice to see, thank you!
THEN, I had no idea about it, but I used to have a motor like that,
(Diezel) what a disaster!
later also had a COX engine with a plastic line-controlled spitfire,
it turned better (I was still young and found it very exciting!)
later when I was/was financially stronger with an Osmax 4.07CC balsa airplane (construction kit) and ROBBE RC control
a lot of LOL!
(I hardly have the time for it now!) Too many hobbies, too little time!
(Besides, I only have granddaughters)
Healthy and Friendly Greetings from the Netherlands!
Rob
(By the way, I forgot to say, it's very good that you can make this, hats off and respect!)
35% ether is better for small diesels. The compression screw ius actually adjusting the ignition timing, so if you keep that in mind it's obvious what the effects will be.
You have a low powered, piston ported engine, they are not good for high power, but run equally well in both directions as the timing is symmetrical, which can be advantageous for "pusher" applications.
I used to race diesels, so got pretty familiar with them. Get it right and they are instant starters hot or cold.
You do great machine work, good job!
that sounds so awesome
My 'penny worth' for for what for what it's worth. (I'm sure you know this already). Years ago when I flew model planes the general consensus was that the needle valve thread needs to be a super fine pitch, this gave a more precise control of the fuel mixture ratio....
It looks to be over propped. Revs should be higher for more efficiency. Amazing talent. I used to use 1% Amyl Nitrate in the fuel.
Very nice work sir
…love the finger…takes me back 50 years and diesel engines with my friends…
you'll like the next video, lots of finger flipping and a very stubborn engine!
It's odd that it doesn't want to break into that sort of "burp... burp.... burp" style of running that other diesels like. I do agree though. I ran a bunch of diesels back in my teens. And the stink from the burnt fuel is very real. Even to requiring a long soak in the tub or multiple washings to remove the smell from my skin. Your glow version is a lot more user friendly in that regard.
Nah it smells good
Idk why people call me weird
That so cool 😊
Nice little diesel motor
Великолепная работа!
Glow fuel is toxic and gives me headaches. Model diesel fuel less so. If you substitute white spirit (in the USA aka mineral spirit) for the paraffinic fuel base (typically house grade kerosene) the odour problem with model diesel fuel is eliminated.
A better fuel recipe for small diesels is 35% di-ethyl ether (John Deere premium starting fluid typical) 35% paraffinic fuel base (kerosene typical) and 30% lubricant grade castor oil (i.e. Klotz Benol).
Bravo
Thanks for sharing:
~25 years ago I was flying U-control 1/2A with 3 up combat with a super simple basically indestructible home brew planes with 049 black widow motors. My third black widow motor I got was a dud, would barely get 14K rpm, where my other two 049's was in the 18K rpm range with 10% nitro thimble drone 5" prop.
Troubleshooting the dud, a friend showed me how to lap sand the case at the carb/tank mount (1500 grit sandpaper put on glass and sprayed with wd40 and sanded in a figure 8 pattern), it knocks off the bulge of the 4 course carb/tank mounting screws (a black sharpie put on before the sanding will show the progress). This did not seem to help the dud motor,,,,but I got an idea.
Why not try it on where the cylinder screws in (effectively changing the timing). I passed my idea by a buddy that road raced the two stroke Yamaha RD400 (and was a auto/diesel mechanic), he said I should raise the exhaust ports (so not remove material, but add to it), so I made a 0.010" base gasket, this made it a super dud motor, lol.
To scientifically gauge what I was about to attempt I measured the height of where the cylinder screws in to the case (see picture of the red lines where I measured - from case to where cylinder screws in), I call this deck height, my normal two good motors was 78 thou (0.078"), the dud was 84 thou, instantly a big grin appeared. With the precision these cox motors are built to, wth was going on with this spec, 0.006" too tall.
I started by taking 5 thou off (glass/sandpaper/wd40, same as I mentioned above) and retesting, result was better, another 5 thou, even better, another 5 thou and was getting hard to start. Then I thought why it was hard to start, hmmm, way to much compression, perfect, the head gaskets were 5 thou, I can compensate with head gaskets, so for every 5 thou I removed from the deck, I added 1 more head gasket.
After continuing this process a few more times (I went down to 53 thou from 84), it turns out, 15 thou off the good motor (was 78 thou, now reduced to ~63 thou with 4 head gaskets (1 original +3)) was the best.
Results are with 10% nitro, Thimble Drone 5x4 balanced prop and plastic reed valve.
Bone stock good motor with 78 thou deck height = 17-18K rpm,
Bone stock dud motor with 84 thou deck height = 14K rpm,
Best was reducing to ~63 thou deck height (on all motors), with a total of 4 head gaskets, 25Krpm and one hit 26Krpm. A gain of 7K rpm!
For pictures and discussion, google search
coxengineforum black widow tuning
Awesome! My first R/C airplane had a Black Widow on it! raising the cylinder was one of the things that got my first weaver running right, the original transfer port timing is very short, so i raised the cylinder with a cardboard gasket and bam, it started right up and ran nicely. that tipped me off to investigate the transfer porting and that's where i came up with my variant of the ports.
Thanks for the nice story!
After it warms up and you've maxed out your compression could you slowly switch to actual diesel fuel? If so that could make a really good little off grid generator
That little thing is a diesel? And I thought the GY6 was underspoken.
I wonder how you can make this job without cnc machine...it is so precise and at the end it works perfectly...my lathe ( a PD 400 proxxon) should be arrived by the end of the month, I wish I 'll be able to do a new Cipolla Junior 1,5 cc motor crankshaft, which I lost in flight many years ago...Was my first glow engine when I was a child...I'll show you the pictures, maybe if you can give me some advice how to do it, I would really appreciate it
The real trick is breaking everything down into individual features, and work through it step by each. Have a browse around Home Model Engine Machinist, it's not specific to this type of engine but theres is a wealth of great information.
www.homemodelenginemachinist.com/
hola que planos usaste para el motor
I have of one of these I found it when I was a out six itbelonged to my uncle I just turned 60 and I still have it..
Do you have any videos of the motors in use on a plane?
I guess I could have checked before asking...😊
Yes i do - czcams.com/video/GQIDPjnC3nI/video.html
I'm working on a twin cylinder version, it's a little underpowered.
❤❤❤❤❤❤❤❤❤
Great! What kind of mix do you use?
25% ether, 25% oil, the balance kerosene
@@JellyFishMachine thank you
I'd love to know how many h/p that little thing is??
UPDATE:... lol. I had to try to figure it out, and by what I could find online it's about - 0.0625-h/p.
(Approx. 16cc to one h/p, ... decimal representation of 1/16th is 0.0625)
Certainly not many!
HI buddy never work over the prop cheers
Лучше за винтом находиться при настройке. Бывает винты разрывает - травмы тогда серьезные.
Да не то что бы разрывает, рука может непроизвольно дёрнулся и сам в винт влезешь. Такое даже чаще бывает
Can i buy your product?
no, sorry. the time it takes to make one would drive the price way outside of reason.
Love the channel. Hopefully you still have all your fingers please try to get into the habit of not priming the motor with the igniter on the glow plug.
🇮🇩🎀👍👍👍🎀🇮🇩🙏
Sir, have the good sense to run that engine in. Put another way, stop treating it as though it is already run in. It is not & it will require a good half hour of rich running on a weak pitch propeller to keep the load off it.
this one's got a few hours running on it, i finished it in january.
cant beat the smell of diesel
gasoline