Running a ball-bearing Drone fixed compression diesel

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  • Опубліковано 23 січ 2025

КОМЕНТАРІ • 47

  • @Servoboy
    @Servoboy 4 роки тому +1

    First time I have seen one running. I envisaged lot of flicking and not starting, but that is most encouraging. I do have a used one. I might give it a go now.

  • @rhyslegge
    @rhyslegge 6 років тому +2

    That's the first time I've heard of a fixed compression diesel, very nice!

    • @briancox3691
      @briancox3691  6 років тому +1

      Thank you! Well, you learned something, which is always a good thing!

    • @direktorpresident
      @direktorpresident 4 роки тому

      I guess we have a perceptual slant...once you launch your model, virtually all engines (diesel, glow or spark) are fixed compression! Like I think Doc Mathews said, when someone asked him why he preferred inverted mounting, "It isn't inverted.". :-)

  • @elduderoony8171
    @elduderoony8171 6 років тому +1

    Beautiful..... just beautiful. I have a couple of these and they’re sweet. Thanks for showing it running.

    • @briancox3691
      @briancox3691  6 років тому +1

      Thanks for your kind comment. I think collectors should play with their engines a lot more. Try it, it's a lot more fun than display cabinets and you learn things that you won't find in documentation.

    • @elduderoony8171
      @elduderoony8171 6 років тому

      Bang on Brian. I totally agree. I also ‘collect’ spinning tops (look up BilletSPIN on google) and I spin them all! Even the quite expensive ones. I love using and appreciating my pieces of miniature engineering.
      Love all your videos Brian. When I can get around to it I’ll pop a wanted list up for you to run reviews of if you’re planning on doing new ones.
      I am planning on making some videos of breaking in some of my engines sometime in the near future..... watch this space! lol

  • @direktorpresident
    @direktorpresident 4 роки тому

    Wonderful sound Brian, thanks....I have just acquired one of these and it is destined for a twice-size "Pal Joey", my first radio model. Now to ingratiate myself with my Pharmacist!!...in Canada here we are lucky in that the Kleen-Flo starter fluid works as well as the John Deere. All the best

    • @briancox3691
      @briancox3691  4 роки тому

      Hi Charles, Sorry I took a long time to reply. As you see, these engines can run very well, but they're very dependent on conditions, particularly ambient temperature. They're great in light old timer floaters that you only fly on nice warm days, but I don't think they are a good choice for a general sport radio model that needs to be an easy "no problem" flier. Your Pal Joey, normal or twice size, would be better with a PAW! Best regards, BC

    • @direktorpresident
      @direktorpresident 4 роки тому

      @@briancox3691 Thank you Brian, yes I totally agree. However I am determined to have that gorgeous black cylinder poking up at the front from the flush mounting of PJ's glossy black snout! Oooh! I am building it very light, with a lifting section tail and rearward CG, and also ailerons (and flaps off the 4th channel - no throttle). She will be 1176 sq in and I hope about 5 lbs. I intend to fly her as a sort of thermal soarer, slow climb (I bet!!) to cut-out and then drift around on varying degress of flap. I'll let you know how she goes; we can't fly here yet anyway, apart from the brr brr.
      All the best C

    • @briancox3691
      @briancox3691  4 роки тому

      @@direktorpresident Charles, OK, but one final word of advice. DON'T commit yourself to the engine choice until you're happy running the engine on the bench. Don't even try in temperatures below 20°C. The ultimate fine tuning (and successful running) of fixed compression diesels is a question of picking the right day... Is that really what you need?

    • @direktorpresident
      @direktorpresident 4 роки тому

      @@briancox3691 Yes, it is quite a specific niche! Thanks Brian, the engine is "new" and I anticipate 5K or so on the 14x6; pitch speed therefore about 30mph (stall speed about 15mph)...I think we are in the realms of possibility. The single channel Pal Joey was not much more than this in terms of flight pattern. I will wait until Spring before I even test the engine, and I can defer the nose construction until then so that I can PAWse at the eleventh hour if necessary!

    • @direktorpresident
      @direktorpresident 3 роки тому

      @@briancox3691 ua-cam.com/video/fKaMGjaAsWQ/v-deo.html Well I thought I would swing it!

  • @davelowets
    @davelowets 2 місяці тому

    Great run... 👌

  • @garygullikson6349
    @garygullikson6349 4 роки тому

    I always wondered how these engines run without compression adjustment, very smooth!

    • @briancox3691
      @briancox3691  4 роки тому

      Yes Gary, They are smooth and very nice to use, in the right weather conditions, but it's not generally realized that, on any one propeller, they only run at one speed. The speed remains absolutely constant, which is why you find it smooth!
      Thanks for your interest, BC

  • @slimriddim4145
    @slimriddim4145 5 років тому +2

    Fabulous thanks! What capacity is the drone engine to be turning a 14x6 prop?

    • @briancox3691
      @briancox3691  5 років тому +1

      Thanks for your kind remark. The capacity is 5cc, or a .29, depending on where you live. Fixed compression diesels are "different" and great fun to play with. Finally, if you like rock and blues music, you might like my daughter's band. I was at this gig, and they were really good. Link: ua-cam.com/video/cLNrqQev7es/v-deo.html

  • @duderoony
    @duderoony 4 роки тому

    Hey Brian. Are you no longer making videos?

    • @briancox3691
      @briancox3691  4 роки тому

      Yes!!! I have no intention of stopping. I've just been a bit busy with other things! There will be more very soon! Thanks for your interest! BC

  • @carneeki
    @carneeki 4 роки тому

    Hi Brian,
    Will model aero engines like the Drone and similar 5cc models work with a flywheel and pulley rather than a propeller, or is the prop required to cool the cylinder head? I'd like to use one in as a stationary unit, though, I could attach an electric fan if cooling is required.
    Thanks in advance,
    Adam

    • @briancox3691
      @briancox3691  4 роки тому

      Hi Adam, I think they could probably be used as you suggest. At the time these engines were current, many were used in tether cars (google "tether model car racing" and you'll see what I mean). In cars, very few used a propeller (those that did are called "air cars"). They were usually turning a flywheel and driving the wheels through a gear system, in a similar manner to a full-size car. Thus, there was very little cooling air flow, especially as the engines were usually enclosed, and they ran OK.
      In any case, if the engine isn't happy it will just slow down and stop and, while this obviously isn't a desirable situation, it's not usually a disaster!
      Thanks for your interest, BC

    • @carneeki
      @carneeki 4 роки тому

      @@briancox3691 Thanks Brian! This brings back a distant memory of seeing a tether car once with my father eons ago.
      BR,
      Adam

  • @cdh997
    @cdh997 6 років тому +1

    C'est super Brian, il ne manque que l'odeur de la fumée

  • @doonsidemills6787
    @doonsidemills6787 3 роки тому +1

    Hello Brian again
    i have picked up a Drone engine,, you have nice runner there,
    are you still running your model engines
    Cheers

    • @briancox3691
      @briancox3691  3 роки тому

      Hi, Of course I'm still running engines. I don't think I shall ever stop. I really must do a few more videos! Good luck with your Drone. Fixed compression diesels are good fun and a good "party trick", it's not that easy...

  • @charlesbovalis6591
    @charlesbovalis6591 4 роки тому

    Excellent video - I noticed that you don't prime through the exchaust opening - any reason for that ? Also - what is the ratio of either / kerosene / oil used on this ?

    • @direktorpresident
      @direktorpresident 4 роки тому +1

      Apparently rich running is bad for these engines, and also you can not back off compression if you do flood it. Here is a fascinating article....thank you Brian for your enthusiasm...
      modelenginenews.org/ad/drone.html

    • @johnkelinske1449
      @johnkelinske1449 3 роки тому

      These don't use kerosene, just ether/mineral oil mix.

    • @direktorpresident
      @direktorpresident 3 роки тому

      @@johnkelinske1449 Yes, my ball bearing Drone runs sweetly on 75%KleenFlo (www.kleenflo.com/products/735.html) and 25% SAE 30 mineral oil, on a Xoar 14x6. A lot of the UA-cam videos show the engine burping and stuttering, with smoky exhaust, so the operators naturally try to lean them out, but in fact they are already too lean. They should be richened up until they run steadily with a clean exhaust, as Brian so ably demonstrates here.

  • @duderoony
    @duderoony 4 роки тому

    Hi again Brian. Just a curiosity note. Are you still running your engines (even if only on the bench for fun) and are you planning any more videos?
    Keep safe my friend. All the best.

    • @briancox3691
      @briancox3691  4 роки тому +1

      Hi, Sorry I haven't been very active. We are pretty limited by the lockdown situation, but I certainly intend to do more videos as soon as I can. Now of course, it's a bit dependent on the weather. I only have a very basic camera and I need good sunlight.
      Thanks for your interest! Back soon!
      Brian

  •  6 років тому

    Smoot running and deep sound Brian. I will run my BB Drone soon, please tell me your fuel recipe %??

    • @elduderoony8171
      @elduderoony8171 6 років тому +2

      From some delving this seems to be about right.....
      Use mineral oil (castor doesn't work well in a Drone)
      SAE 30 oil 25%
      Ether 75% (if you cannot source ether you’ll need to harvest some from something like John Deer starting fluid)
      Because of its’ low speed the Drone runs forever on the straight ether brew if propped right - an 11x10 works great.
      If anyone feels they have a better recipe please comment.....

    •  6 років тому +1

      @@elduderoony8171 many thanks

    • @briancox3691
      @briancox3691  6 років тому +2

      Hi J-M, The fuel mix is very simple, just 75% ether and 25% oil. That was the mixture recommended by Micron and Drone. It works well with the 14x6 wood propeller, like in the video. One important thing, with fixed compression diesels, is ambient air temperature. When you try for the first time, Don't try in temperatures below 20°C or higher than 30°C. On a normal warm summer day, with a temperature around 25°C, the fuel mixture and propeller mentioned will give good results, if your engine is in good condition.

    •  6 років тому

      @@briancox3691 Thanks for reply G-M (Groucho Marx) :-) I wish mine is in good condition

    • @briancox3691
      @briancox3691  5 років тому +1

      J-M, I wondered why you mentioned Groucho Marx, and I've just realised that you think my avatar (little image) is Groucho Marx...
      No! it's Ben Turpin, one of my old favourites. Google "Ben Turpin" and you'll find details, and the image as well!

  • @locktite401
    @locktite401 6 років тому

    Why don't you use electric in your drone?

    • @linusek1
      @linusek1 6 років тому +1

      @Scott E agree...

    •  6 років тому

      @Scott E I am agree

    • @johnkelinske1449
      @johnkelinske1449 3 роки тому

      If you mean electric starter, they are a bad idea on any compression ignition engine.