Juergen,I had posted links to pictures of "Mishka" back in 2013:
these urls point to the original build thread in the Russian forum. Perhaps you could try to contact JonSu via this forum. With modern translation programs like deepL or Google Translate it should be possible to have a pretty good conversation even if your Russian is not all that great and JonSu's English seems to be ok (a program as well??...;-) anyway here is a link to Mishka's build thread.
Thank you very much. I love pioneers like this. I can totally relate to them.Hi John, I am a plain and simple mechanical engineer who has tried for several years to get to grips with the peculiarities of rotary wing aircraft and especially their flight stability. I will enjoy following your build thread and see how you tackle the problem of creating real hardware.
Good luck with your project!
PS : designing a helicopter is definitely not for the faint of heart but one may get a lot of inspiration from a Swiss who did it decades ago: