Bi-1

[Letipapa]

Ah, so, no more fuel and than a kind of sailing, or better to say falling down, to the runway (or better to say the field). Something like that?

[Nico Braas]

Yep, as soon as fuel was exhausted it was noting more than a glider! With its short wings and high wing loading I assume that any landing with this contraption must have been 'interesting'!! Me-163 Komet was also glider when fuel was burned up, but at least pilots started their training on gliders with shortened wings to simulate higher landing speeds before they flew unpowered Me-163 version. BI-1 also flew unpowered as we can see from photos with rocket exhaust covered by a streamlined cap.
In Germany there is still a Me-163 replica flying as a glider!!

[Letipapa]

I have Me-163 in my flight simulator, and I tried it... it's a pretty hard job to land it nice. I finished like this Bi-1 on a film, many times, even worse But, of course  I am not trained pilot.

Look, these were times in some way similar to pioneering times before 1914. Who knew how an aircraft will be acting in such speeds? Then the sensitivity of fuels, then the speed of production, savings on material etc.
I do not know did Russians started this experiments independently by themselves or after, when they captured all those German factories, projects, airplanes, men...
But all those guys who flied those machines were very brave!