OTM Sokol - renovation and maybe handmade conrod for second one

Hi,
As I wrote in the previous topic (LINK) , in the package from Marek @m2z (from Polish forum) there were also OTM Sokol engine. Two .

The first engine was complete and only needed cleaning. From the interesting things, the piston and contra piston remind me a little bit of HEMI engines construction . Of course with a pinch of salt . By the way I'd like to have a car with a old HEMI engine someday  

Few photos of the first Sokol:







I started the engine on this configuration:
Prop: MA 8x4 ~10 000 RPM and 9x6 ~7 800 - 8 000 RPM
Fuel: 34% Kerosene, 34% Ether, 15% Motul 710, 15% Castor Oil and 2% Mannol diesel additive

Album with more photos of the engine:
https://photos.app.goo.gl/xXvWLAxht6MhzNRa9

And video:


The engine is very, very loud and runs great. By the way I love the diesel engine sound on the low compression setting .

The second engine unfortunately does not have all the parts. Unfortunately I am only able to make the connecting rod myself. Fortunately a friend from the Polish forum Jacek will send me some parts and maybe surely this motor will work too .