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I have a 1/3 scale Baker Monitor engine built by someone else about 15 years ago. While the engine ran once for about 15 minutes, I haven't had much success since. One of the issues was the apparent lack of compression. I would have expected somewhere around 4 or 5 to 1 but it doesn't feel like...

DEDE Send me an email at [email protected] with the rotary table ratio eg 90:1 and I will send you a working program. I have sent this program to well over 150 members over several years with no complaints. Note, you will have to have the libraries installed. Bruce W-S

It has been an interesting read of the engine build. I finished mine two years ago and adopted a some what different approach to the build. The problem for me was always going to be the cylinder bore. I did purchase a suitable reamer and after a trial run put it to one side. My lathe just wasn't...

Smokey This is a long shot so to speak however, I am trying to source some information on the Baker Ball Hopper Monitor engine 1/3 scale - see photo. The engine was purchased just over five years ago from someone who purchased it from the original builder long since gone. So the finished...

Phil If I remember correctly your ratio was 4:1 and the divisor was 4.4444. Now you have added a further 3:1 eg 7:1 total and the new divisor is 7.7778. All you needed to do was edit line 34 with the new value. The stepper driver should be left with a division of 2. The output from the Arduino...

It doesn't matter what the ratio is, it can be adjusted on line 34 of the sketch and I provided a list variables for each ratio. I have provided the sketch to well over one hundred people so far and I haven't had any adverse feedback. I modified the original sketch to remove the rounding errors...

Lloyd To answer your question, the bore of my engine was 40mm with a 80mm stroke. The piston was 80mm long to accomodate the rings and lubrication was via drip feed. The combustion cycle was four stroke and the target RPM was 300 however, could not achieve it and it ran better at 500 to 700...

Lloyd It is interesting to hear about your journey in respect to building a true diesel using diesel as a fuel. I noted your comments regarding others who have built small diesels however, I think you will find that they are not using diesel as such but a mixture of either and light kero. Using...

Rotary Table sketch. For anyone who wants a copy, email me using the email :- [email protected] along with the ratio you are using. Bruce W-S

Jaime Happy to send you the latest sketch. Just send me a personal email. I can't upload the sketch directly but email OK. Just change the multiplier to suit the ratio of your rotary table. Bruce W-S

Kim Just send me an email along with the ratio of your rotary table and I will send you the sketch along with instructions to change the ratio if you ever need to. Adzijderlaan When you send me an email, could you also include the ratio you are using. I also have been to Amsterdam several...

adzijderlaan This project has been around for a long time and while the original contributor did (I think anyway) a reasonably good job of it. Yes there were a few issues but it was a good starting point for most. The main problem has been around the use of integers rather than reals so...

Thankyou for the photos and it is appreciated. I can now see the spring arrangement which was not clear on the drawings. Bruce W-S

gg89220 I am currently building the Otto Langen engine and it is 80% complete. The build was to take place over a 12 month period however I am moving into an apartment where I will not have a workshop after 40 odd years of model engineering. As a result, the build is being done over a six week...

McRoth The input voltage to all Arduinos can range from about 7 volts to 12 volts dc. For the internal 5 volt regulator to work, the input must be greater than 5 volts. The input is via the power connector not the five volt pins which are outputs from the regulator. As for smoking your power...

John W You just wind back the other way. Providing the turns are all in the same direction, it really doesn't matter how you go about it. You are only using low voltage so the voltage difference between turns is minimal. If you were winding a high tension coil that would be a different matter...

Brian I have just (almost anyway) finished a Fairbanks Morse R80 which is a three cylinder engine and it is fitted with three igniters. The principal as to how they work is simple however, making them so small is something else. Mine are oval in shape approx 12 x 8 mm. I have plenty of info...

Minh I have been following this discussion with some interest and there have been some useful comments so I will add my ten cents worth. When building a model diesel say 6th scale or less, there are some aspects of the combustion cycle that are difficult to replicate in terms of the real...