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How do you polish finished brass parts ? How do you treat brass surface after polishing ? How many bearings have to be oiled on mechanism ? You should etch your name on each single part of astro clock.

From my childhood i am amazed with clocks and watches but your astro clock is breathtaking work.

thank you el gringo for your answer. I have half finished engine // roughly 10 ccm // . This is my first water cooled engine so I do not have any experiences with water cooling I will probably machine some kind of primitive radial water pump. Kadora

As usual perfectly made engine. Does termosifon water cooling work properly ? I want to use it for my new engine but I am not sure if this type of cooling system really works on small engines. Thank you

Engine s sound is beautiful music .

Thank you friends deverett I read on internet that glow plug does not ignite fuel under 8:1 compression ratio so I am surprised you run your engine on such low ratio. Very useful information. TonyM I will be happy to reach stabile 600 RPM. Yesterday I had time to machine some new engine...

Thank you guys a lot for your advices. TonyM my engine will have stroke 30 mm /bore 20 mm. //I hope con rod will not be too tiny for such small bore// My intention was to use glow plug ignition but is practically impossible to run glow engine with such low compression ratio. I have to...

Hello friends I am collecting information for my next project - small boat powered by single cylinder four stroke engine. I would like to machine a kind of low RPM engine. So my question is What should I take to consideration to build low RPM four stroke engine . What valve timing is...

Here in Slovakia I can buy 10 mm drill bit for 1.5 EUR but half inch drill bit costs me 10 EUR. I am happy we have the same circle division to 360 degrees and time to 24 hours.

I have found very easy free drawing program CadStd by John Apperson . You need maximally one hour too learn how to use it .

Ahoj from Slovakia Happy to have neighbour here.

Hello Dear friends what is your opinion on production con rods from brass flat rod 3mmx12mm. I would like to use it for 40 ccm four cylinder/4x10ccm/ but i am not sure if brass is suitable or solid enough for con rod production. Your advices are welcome.

The best tutorial I have ever read. Thank you

Hello engine addicted. I am machining new four cylinder engine but i was so tired after 3 months of intensive engine machinig that i have decided to have a break. But what with spare time? Yes i will try to built my long time dream - Modern quartz movement accommodate in WW2 Trench watch case...

Perfectly finished engine . Is engine surface anodized or sprayed with a paint?

My China DRO jumps even the mill is disconnected from the wall socket.

I start my new engines this way. Disconnect ignition - full throttle - cover carburator inlet with finger - turn engine with an electrick tool until you see small droplets of fuel flying out of exhaust pipe then release finger and connect ignition - start with throtle fully open. New engines...

I use similar red sand for casting its trade name is PROCAST A . This sand is specially designed for aluminium i love this stuff . http://giessereiartikel.de/shop/index.php?cPath=1_8 BTW what kind of paint do you use for patern painting ?

I had intended to build this engine from classic-motors castings but then i changed my mind and bought castings for De Dion engine. Anyway keep us informed on your progress.

Thank you guys for your explanation . This CNC machines are terra incognita for me so i have to rely on casting for more complicated engine parts. Anyway I will follow this thread to see your progress. BTW how will you do housings for crank shaft bearings?