Recent content by edholly

Home Model Engine Machinist Forum

Help Support Home Model Engine Machinist Forum:

  1. edholly

    Total new-comer to CAD. Which programme to choose.

    I have been building and designing model engines now for quite some years and have been modelling for over 65 years. I have designed from scratch about 11 model diesel engines and built them and they all run - and have had a couple put on CAD by kind fellow enthusiasts. I would like to have a...
  2. edholly

    OUTERZONE - Model Engine Plans

    I might as well start the built from Outerzone plans input. These are the engines I have made from them .... 1. First was the BollAero18 my first build. 2. Owen Mate 3. Mills 1.3 4 a twin ballrace 2.5 version of the Owen Mate using a cast crankcase 6 ML Midge 7. Vee twin based on ML Midge 8. Vee...
  3. edholly

    OUTERZONE - Model Engine Plans

    Steve at OUTERZONE has now created a category and loaded an initial batch of 36 plans. If you have any that aren’t on the site or have some that are your own that you have made an engine from, then Steve would be happy to load them. They need not be on CAD, so long as they are legible and...
  4. edholly

    OUTERZONE to host Model Engine Plans

    OUTERZONE have, since 2011, been the go-to place for model aircraft plans. As of Thursday, they will also be hosting plans for model engine building with the initial 2 plans going on. Over the next few weeks many more will be loaded which will be around 40, so after this initial batch is on -...
  5. edholly

    MINI BUDDY .021ci engine

    Some more photos and the link didn't go on for some reason ... here it is Note the run was only with what filled the small diameter fuel tube - pretty frugal !
  6. edholly

    Mini Buddy .021 ci engine

    Just a quick report on a new motor just finished. I have called it the Mini Buddy as a follow on from the Holly Buddy and Holly Buddy inline twin. The design had to incorporate these design features Easy to build Enough power to fly a free flight model around 24 to 30 inches Long lasting Easy...
  7. edholly

    MINI BUDDY .021ci engine

    Just a quick report on a new motor just finished. I have called it the Mini Buddy as a follow on from the Holly Buddy and Holly Buddy inline twin. Great that Patrick Strobel is doing the CAD plans for this one - thanks Patrick.. The design had to incorporate these design features Easy to...
  8. edholly

    Peggy - my Holly Buddy remix - 2.5cc CI engine

    Hi Patrick - a wonderful build - congratulations. Why not make a twin HB - will try to help you with plans if you wanted to ... kind regards ... Ed
  9. edholly

    Reducing the machining of an interrupted cut.

    I used to machine the whole bar to make the bigend (crankpin) on the end of a conrod a long and horrible job - these days I drill a hole to depth and the humble hacksaw does most of the rest of the work and the lathe says thankyou.
  10. edholly

    New 2.5 cc Model Diesel design and build.

    Hi Gerard, sure sorry to hear about your fall - we don't bounce as well as we did when we were younger .. Great news about the Buddy ... perseverance pays off, and the fit is not easy to achieve. Well done Gerard .. and thanks for letting those interested in this thread know ... cheers ...
  11. edholly

    The Holly Buddy Mk2 - the build from a casting

    Next installment - machining the venturi hole. Simple process, setup in the vice and ensure chocked so it can't move when jaws done up around the nose extension. Drill the 5.5 mm hole and lightly face off each side flat. Make the rear cover with an extension and screw in then holding that in the...
  12. edholly

    The Holly Buddy Mk2 - the build from a casting

    So the next step was to deck the top of the crankcase, bore the cylinder well and drill and tap the 4 x 3 mm hold down holes. The deck was machined flat as per above dimensions which in fact was "cleaned" by just 10 thou, so the casting had just enough meat to allow spec to be maintained. I had...
  13. edholly

    The Holly Buddy Mk2 - the build from a casting

    The next step is to create the cylinder aperture and hold down bolt holes. I actually modified my vice so the I can clamp things down that are within the jaws, to do this element of the build. You can see how this works in the 3rd photo. I needed to know how much to take of the "deck" as a...
  14. edholly

    The Holly Buddy Mk2 - the build from a casting

    Now the spigot at the front has been machined, time to turn it around and complete the tunnel part of the case. I always have a second thought before taking something out of the chuck, once disturbed it always runs the risk of a bit of run-out. But instead of removing from the chuck, it was...
  15. edholly

    The Holly Buddy Mk2 - the build from a casting

    This is truing up in the lathe and taking first cuts. Using the rear boss l only had to move it once and it came up within 5 thous of run-out for the front. The first cut was 5 thou and it cleaned up all except adjacent to the join line, another 4 thous cut and that dis-appeared. This shows the...
Top