Tiny I.C. Engine

Discussion in 'Photos and Videos' started by putputman, Jan 30, 2010.

Help Support HMEM by donating using the link above.
  1. Jan 30, 2010 #1

    putputman

    putputman

    putputman

    Senior Member

    Joined:
    Nov 22, 2008
    Messages:
    600
    Likes Received:
    54
    Feb 20 2010 -- I HAVE REMOVED ALL OLD PRINTS AND REPLACED THEM WITH REVISION "B" PRINTS. THEY SHOULD SHOW UP IN MY FIRST 6 POSTS. THERE IS ONE SET OF NOTES AND 21 PRINTS.


    This is a tiny I.C. engine that I just completed. I first saw this engine at the LeSueur, MN. Pioneer Power Days last summer. A gentleman by the name of Jim, from Des Moines, IA. Had a couple small engines that that were beautifully built and run like a dream. Jim and I have had many conversations since we first met and he has provided me with build information talked me through several problems I had completing this engine. Jim, I can't thank you enough.

    This is the smallest I.C. Engine that I ever tackled.
    [​IMG]

    It has a 3/8 dia. Bore and a 1/2 inch stroke. Getting two valves and a spark plug in that small area proved to be quite a challenge.
    [​IMG]

    It was the first time I tried making a spark plug. The body was made from 12L14 with a Teflon insulator and .035 music wire electrode.
    [​IMG]

    The fuel mixer was also quite small. The spray bar has .018 fuel inlet and a .020 cross hole. The needle is a .025 dia sewing needle.
    [​IMG]

    Jim recommended using S/S Machine & Engineering for a CDI unit for the electrical end. Knowing absolutely nothing about CDI units, I contacted Roy Sholl, owner/operator of SS. I have to say that I have never worked with any supplier that has been as patient and helpful as Roy. I highly recommend him for anyone needing an ignition system for their models.

    The CDI unit is very small and I was able to conceal it in the Corian base I made for this engine. The unit puts out a good spark. I ended up using a Hall Effect for my ignition.
    [​IMG]

    Had a few problems getting the engine to run and stay running. I used an O-ring on the piston. The valves sealed OK. It took several tries to get the intake spring pressure correct. Once it started it run pretty good, but after a short time it would quit. I would have to choke the heck out of it to get it started again. After several runs, it wouldn't even start. I replaced the O-ring and it took off again. Apparently the finish in the bore was too rough and would ware out the O-ring quite fast. I put a good finish in the bore and haven't had a problem since.
    [​IMG]

    This could be an ideal I.C. Engine for the people that have mini lathes & milling machines such as Sherline and Tieg.

    View attachment Tiny I.C. Notes -- rev B.pdf

    View attachment Tiny 1 Frame - rev B.pdf

    View attachment Tiny 1A Crank Ret. -- rev B.pdf

    View attachment Tiny 2 Gas Tank -- rev B.pdf
     
  2. Jan 30, 2010 #2

    Speedy

    Speedy

    Speedy

    Senior Member

    Joined:
    May 3, 2008
    Messages:
    481
    Likes Received:
    17
    WOW thats very cool :bow:
    does he sell the plans?
    I have a sherline mill and taig lathe. im always looking for engines
     
    robcas631 likes this.
  3. Jan 30, 2010 #3

    gbritnell

    gbritnell

    gbritnell

    Project of the Month Winner!!! Project of the Month Winner

    Joined:
    Jul 16, 2007
    Messages:
    2,562
    Likes Received:
    473
    Great job on that little popper Arv. I built one a little bit bigger than yours and the only way I could get the rpm down was to make bigger flywheels. The spark plug looks like it's working well.
    gbritnell
     
    robcas631 likes this.
  4. Jan 30, 2010 #4

    cfellows

    cfellows

    cfellows

    Well-Known Member Project of the Month Winner

    Joined:
    Aug 26, 2007
    Messages:
    3,878
    Likes Received:
    667
    That's pretty amazing, Arv. You are definitely versatile in the types of projects you finish. Does it get hot pretty quick?

    Chuck
     
    robcas631 likes this.
  5. Jan 30, 2010 #5

    ironman

    ironman

    ironman

    Well-Known Member

    Joined:
    Jul 2, 2009
    Messages:
    312
    Likes Received:
    4
    Great looking and sounding engine Arv. Any available plans? Be a neat project. Congrats. Job well done. ironman
     
    robcas631 likes this.
  6. Jan 30, 2010 #6

    Maryak

    Maryak

    Maryak

    Well-Known Member

    Joined:
    Sep 13, 2008
    Messages:
    5,001
    Likes Received:
    73
    Wow, I admire your patience. :bow: :bow:

    Best Regards
    Bob
     
    robcas631 likes this.
  7. Jan 30, 2010 #7

    Tin Falcon

    Tin Falcon

    Tin Falcon

    Well-Known Member

    Joined:
    Jul 9, 2007
    Messages:
    7,212
    Likes Received:
    761
    where can we get plans is that jims design . It looks a lot like an Uphur I have a set of those.
    Tin
     
    robcas631 likes this.
  8. Jan 30, 2010 #8

    Quickj

    Quickj

    Quickj

    Well-Known Member

    Joined:
    Sep 20, 2009
    Messages:
    86
    Likes Received:
    2
    PutPutMan (Arv),

    That is awesome. Hopefully I will get the chance to see it in person at one of the shows here this year.

    Looks good, Runs Good.

    Jim
     
    robcas631 likes this.
  9. Jan 31, 2010 #9

    rake60

    rake60

    rake60

    Well-Known Member

    Joined:
    Jul 8, 2007
    Messages:
    4,769
    Likes Received:
    104
    Nice Arv.
    Very nice! :bow: :bow: :bow:

    Rick
     
    robcas631 likes this.
  10. Jan 31, 2010 #10

    Jtrain

    Jtrain

    Jtrain

    Well-Known Member

    Joined:
    Jan 31, 2010
    Messages:
    54
    Likes Received:
    5
    Wow, that is awesome.
     
    robcas631 likes this.
  11. Jan 31, 2010 #11

    doc1955

    doc1955

    doc1955

    Gone

    Joined:
    Aug 27, 2009
    Messages:
    968
    Likes Received:
    28
    That is very impressive to say the least. It really purrs nice!
    When is the show you mention and where is LeSueur, MN?
    I attend the show at Rolagg MN every year and a show locally well just north of here. I've been away from the shop life for the last 7 or 8 years just now getting back into it after missing making chips. Isn't it a rush when you fire up an engine for the first time. I would bet firing that little beauty the first time was a really big thrill.
    I am very impressed with your work!
     
    robcas631 likes this.
  12. Jan 31, 2010 #12

    rudydubya

    rudydubya

    rudydubya

    Well-Known Member

    Joined:
    Nov 26, 2008
    Messages:
    337
    Likes Received:
    7
    Really nice and compact Arv. My compliments on a well-done project. :bow:

    Rudy
     
    robcas631 likes this.
  13. Jan 31, 2010 #13

    slick95

    slick95

    slick95

    Well-Known Member

    Joined:
    Apr 24, 2009
    Messages:
    188
    Likes Received:
    2
    Very well done Arv :bow: :bow: :bow: It just purs right along. SUPER!!!

    I'm not sure I could even see all those little parts but I sure would like to have a try at a small engine like the "Tiny".

    Jeff
     
    robcas631 likes this.
  14. Jan 31, 2010 #14

    Quickj

    Quickj

    Quickj

    Well-Known Member

    Joined:
    Sep 20, 2009
    Messages:
    86
    Likes Received:
    2
    Doc,
    The show in LeSueur, MN is the LeSueur Pioneer Power Show, This year it will be held August 27-29 2010. LeSueur is about 60 miles Southwest of Minneapolis, so quite a haul from JamesTown, N.D. Here is a link to their website,

    http://www.pioneerpowershow.com/

    They do have a separate building called "Miniatureland" for the Model engine builders, and every year there are 12-20 in attendance.

    I attended maybe 8 shows last year from Winfield Kansas to Rollag, MN and I think I ran into Arv at half of them.

    Jim
     
    robcas631 likes this.
  15. Jan 31, 2010 #15

    stevehuckss396

    stevehuckss396

    stevehuckss396

    Senior Member

    Joined:
    Nov 19, 2008
    Messages:
    3,797
    Likes Received:
    893
    Nice job Putput!

    I have been thinking about a 4 cylinder project that would have a bore of .313. What size thread is on your spark plug? I made a 6-56 thread plug that worked but i dropped it and it is no longer with us. Also how did the teflon machine? I tried corian and it machines well but is real easy to snap if to deep a cut is taken.

    I also like that ignition. I use it on the Peewee and bought the same unit for the Hodgson 9 cylinder project. They work great.
     
    robcas631 likes this.
  16. Jan 31, 2010 #16

    b.lindsey

    b.lindsey

    b.lindsey

    Project of the Month Winner!!! Project of the Month Winner

    Joined:
    Jan 3, 2008
    Messages:
    2,085
    Likes Received:
    17
    That is amazing work Arv and it runs so well as the video clearly shows. Thanks for sharing the pics and vid!!

    Bill
     
    robcas631 likes this.
  17. Jan 31, 2010 #17

    putputman

    putputman

    putputman

    Senior Member

    Joined:
    Nov 22, 2008
    Messages:
    600
    Likes Received:
    54
    Thanks to everyone for the compliments and comments. It has really been a fun & satisfying project, however frustrating at times. Smaller isn't always better & easier.

    The design is essentially a 1/2 scale of the Upshur horizontal but with a lot of changes.

    I did redraw every detail prior to building the unit. The drawings are not professional or even up to industry standards. I merely draw them so I can understand them and assemble the engine on the computer before I cut steel. I will post them as soon as I can check them over and figure out how to post them as PDF files.

    Chuck, to answer your question, I really haven't run the engine long enough to see how hot is really gets. It does warm up quite fast.

    Steve, the spark plug has a 10-32 thread, which seems too large for the cylinder size, but I cheated a little. After the threaded portion I necked it down to 1/8 for the remainder. That was the only way I could fit the plug and two valves in 3/8 dia. The Teflon machined OK but it was difficult to press onto the metal housing. It was like pushing a noodle. The plug shown was too short and did not enter the cyclinder area. The one in the engine is a little longer.


    Half scale spark 012A.jpg

    View attachment Tiny 3 Cylinder -- rev B.pdf

    View attachment Tiny 4 Crank -- rev B.pdf

    View attachment Tiny 5 Flywheel -- rev B.pdf
     
    robcas631 and sergulbka like this.
  18. Jan 31, 2010 #18

    NickG

    NickG

    NickG

    Well-Known Member

    Joined:
    Jun 20, 2008
    Messages:
    1,025
    Likes Received:
    19
    Arv, wow, I love your engine, it's a little cracker. I would be very interested to see your drawings when you get around to it. I've been looking at the odds and ends hit & miss which is a design I love but also like this one so I need to try and make things as simple as possible when I do mine!

    Nick
     
    robcas631 likes this.
  19. Jan 31, 2010 #19

    solver

    solver

    solver

    Active Member

    Joined:
    Jan 31, 2010
    Messages:
    42
    Likes Received:
    6
    Arv, pressing the teflon part to metal housing is much easier, if you use 'guiding tube', that has same a bit larger diameter, as spark plugs hole has. So the teflon doesn't have a chance to spread out.
     
    robcas631 likes this.
  20. Feb 2, 2010 #20

    putputman

    putputman

    putputman

    Senior Member

    Joined:
    Nov 22, 2008
    Messages:
    600
    Likes Received:
    54
    OK fellows, need some help. I tried loading 7 PDF files this morning and maybe 1 got uploaded. I must be doing something wrong, but don't know what. Need some simple instructions on how to load more than one at a time or more than one in the same folder.

    Also, once I load some PDF files will I be able to add more later to the same group and maybe even remove some absolete files.




    View attachment Tiny 6 Gears -- rev B.pdf

    View attachment Tiny 7 Piston -- rev B.pdf

    View attachment Tiny 9 Head -- rev B.pdf

    View attachment Tiny 8 Con Rod -- rev C.pdf
     
    Walltoddj, robcas631 and sergulbka like this.

Share This Page