Joss, this heli is slightly described at http://twistairclub.narod.ru
including photos of it's step-by-step unfolding. It wasn't ever flown. The
main reason why is mostly explained as "no suitable engine which would fit
this design that time". I've heard that it was designed to be powered by
small rotary engine but the engine wasn't actually built (never run good
enough - to be exact).

Cheers,

Alex