The building of any form of model diesel is no mean feat for anyone. However, I have started on a new project to build a 1:6 scale of the DM 104 single cylinder diesel. It is a vertical engine with an auxiliary compressor running off the main shaft. See attached photograph taken in the Danish diesel museum. I have also included a photograph of a similar but smaller engine located in Munich. I have located about 12 of these engines still in running condition, so there are not many of them.
I have spent the last two years building a experimental diesel with a 40mm bore to experience the problems of building such an engine. The lessons gained so far is more of what not to do and upping the accuracy required. So far, I have made 11 injectors and several fuel pumps all with varying degrees of success. However, I now have what I believe is a working injector. Obtaining sufficient compression was another problem now over come.
In respect to the new engine, I have all but completed the flywheel (see photos taken a a friends workshop where I used his large lathe) and I am well on the way to putting the drawings into CAD. My intention with this build, is to construct it to the highest standard within my capabilities. There are considerable problems with building this engine and using air-blast injection. The main one is the compressor which has to work at 800 psi as well as requiring intercoolers. The problem with diesels is that you can't scale the physics and therefore you need to make the components to withstand those conditions. I have now collected a considerable amount of information and drawings of this engine. If anyone has an interest in the progress etc I am happy to provide updates.
Bruce W-S
I have spent the last two years building a experimental diesel with a 40mm bore to experience the problems of building such an engine. The lessons gained so far is more of what not to do and upping the accuracy required. So far, I have made 11 injectors and several fuel pumps all with varying degrees of success. However, I now have what I believe is a working injector. Obtaining sufficient compression was another problem now over come.
In respect to the new engine, I have all but completed the flywheel (see photos taken a a friends workshop where I used his large lathe) and I am well on the way to putting the drawings into CAD. My intention with this build, is to construct it to the highest standard within my capabilities. There are considerable problems with building this engine and using air-blast injection. The main one is the compressor which has to work at 800 psi as well as requiring intercoolers. The problem with diesels is that you can't scale the physics and therefore you need to make the components to withstand those conditions. I have now collected a considerable amount of information and drawings of this engine. If anyone has an interest in the progress etc I am happy to provide updates.
Bruce W-S
![IMG_0289.jpeg IMG_0289.jpeg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attach/46/46811-IMG-0289.jpeg)
![IMG_0003.jpeg IMG_0003.jpeg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attach/46/46812-IMG-0003.jpeg)
![IMG_0316.jpeg IMG_0316.jpeg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attach/46/46813-IMG-0316.jpeg)
![IMG_0320.jpeg IMG_0320.jpeg](https://cdn.imagearchive.com/homemodelenginemachinist/data/attach/46/46814-IMG-0320.jpeg)
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