Recent content by weir-smith

In respect to building a true model diesel, this has been an interesting discussion with some informative comments. I have written about my experience previously regarding building a true model diesel but here is a condensed version. I started out with a basic design of an engine with an 32 mm...

For anyone who has been following this thread, what we have been discussing are the plans for a single cylinder air blast diesel. I happen to have a set of original works drawings for a Sulzer which are very rare. To my knowledge no one has built a model of a working air blast engine. There was...

Hola El modelo de un motor diésel con chorro de aire es bastante complejo y sólo debe intentarlo un ingeniero de modelos experimentado. Los dibujos son A0, por ejemplo, 1 x 1,4 metros, por lo que son bastante grandes. Te tomaré algunas fotos y podrás decidir si quieres continuar. También hay un...

Hello, good morning. I wanted to know if you made the plans or if you found them on the internet. Ruben Construí el mío según mis propios planes, aunque sigue sin terminar. Tengo algunos planes originales para un motor similar si estás interesado. Sólo házmelo saber y dame unos días para...

Themis Send me the ratio of your rotary table and an email address, and I will send you the sketch. Note, this sketch has been sent to more than 150 people so it's quite reliable. Bruce WS

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