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Teeny Tiny Micro Model Diesel from Germany

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Zephyrin:

I made this one years ago, 0.1cc (5 mm bore & stroke)
from R. Gordon in an insert of Model Engineer, vol 169, p 566 N°3932. 

the plans are of very good quality though, but it's just very small and difficult to make; not easy to hold the parts between your fingers! 
it had occasional pops but honestly, I can't say it's a runner, in spite of hard work and many pistons, compression only lasted a few brief moments.

rklopp:
I built three Gordon Nanos and ultimately got them all to run, but it was a heavy challenge. Against all wisdom, I used an electric starter, but it was a weak home-build one, so I did not break anything. I had troubles keeping one of the venturi's glued on and one engine seems to have lost a lot of compression quickly. They are shelf queens now.

pirmin:
 :facepalm: i have the gordon nano here in unfishied state. after messing up the crankcase 3 times in a row i was so unmotivated to start a 4rth one. it is a realy challenging engine. i have a friend in Finland , he built two and got them to run flawless without electric starter. but , he is a master when it comes to lapping cylinder bores and pistons. i believe he had a swiss friend who used a PEMAMO micro honing device to make him an accurate true bore, and he then introduced 2-3 microns taper in the liner.   upon looking on the drawings from what i see i would also have to make quite a few custom tools .

the engine is pictured in Adrians model engine website ,the designer was Georg Schaub, not much is known beside the article on adrians website and the full set of drawings i have. i have forwarded the drawings to Adrian in hope he can use them to get more informations, but thats all for now

Admiral_dk:
You don't really go much under 1cc before the mechanical requirements (Pręcision) grows by several orders of magnitude to make a runner - especially if it is a CI Engine  :o   :wallbang:

A beginner (in regards to CI Engines) size would be 2-3.5cc.

Per          :cheers:

pirmin:
i agree. i already made the Sparey 0,6cc , this was my first build  when i bought my lathe just twoo weeks in the hobby. it was a runner right away. its just at this size of the nano mistakes cant be made. there is no room for it .

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