Engines > From Plans
Mount Trapezium
redhouseluv:
I'm moving onto something a bit more sedate compared to high speed marine engines and a bit different to the Stuart engines which I'm very partial to! :)
It's the Anthony Mount Trapezium Engine; it has an interesting movement and I found a couple of images of a completed engine online (surprisingly few available). I bought the castings before implementing my rule of not purchasing partially built casting kits, but let's see how things pan out....I have the old Engineering in Miniature copies which cover this build so hopefully they will help
I made a start today by removing the deep milling marks on the Omega shaped engine supports and machining them to size; they are aluminium as are a few of the castings. Are there any tips for machining, tapping and other processes when using Ali, it's not something I've had experience with?
Finally, if someone has built one of these, please let me know, always good to hear about the 'gotchas' ;D
crueby:
Neat looking engine! Quick search found a reference that "The model was designed by Anthony Mount in 1:12 scale and serialised in Engineering In Miniature from July 1997 to February 1998." A few of the issues with the article can be found here:
https://archive.org/details/engineering-in-minature-july-1997
https://archive.org/details/engineering-in-miniature-september-1997-vol-19-no-3
https://archive.org/details/engineering-in-miniature-october-1997-vol-19-no-4
Not sure if that engine was included in either of the Anthony Mount books by Tee Publishing?
Jasonb:
Not one of his that you see very often so interested to see how it turns out. Not in either of his books.Was it built to imperial or metric measurements as he did do some engines in dual dimensions and the later ones just in metric?
As for aluminium, you can turn, mill and drill with higher spindle speeds than you would for steel or iron. Sharp tools if you us einserts then get some **GT ones and if you need any new milling cutters than the ones made for aluminium and other non ferrous metals are worth getting not least as theit polished surface helps prevent aluminium sticking to the cutting edges. Also that can be helped a lot with a little cutting lubricant, I use paraffin but WD40 also works or any other very light oil.
redhouseluv:
The drawings have both Imperial and Metric on them - thank goodness as I'm very limited on metric and really don't fancy buying another whole set of tooling!
Thanks for the advice on machining Ali, I remember having problems when machining gun metal which is also softer.
I've read the first volume of EIM and apparently the engine is attributed to this splendid looking German gentleman Professor Franz Reuleaux who is famed for his diagrams and kinematics?
https://en.wikipedia.org/wiki/Franz_Reuleaux
some of his mechanisms are fascinating and would make great builds!
https://www.engineering.cornell.edu/mae/reuleaux-collection/
Michael S.:
Hello Sanjay,
These steam engines are very interesting, and I'm excited to see your progress.
There are a few illustrations of these "hanger steam engines" , In German: "Bügel Dampfmaschine" , in old books.
Michael
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