Conversation so far:
How did Sergei get started in his career?
After graduation, Sergei Korolev worked with some of the best Soviet designers at the 4th Experimental Section aircraft design bureau OPO-4 headed by Paul Aimé Richard
Where did working with some of the best Soviet designers at the 4th Experimental Section aircraft design bureau OPO-4 headed by Paul Aimé Richardlead Sergei Korolev?
Sergei Korolev did not stand out in this group, but while so employed he also worked independently to design a glider capable of performing aerobatics.
Was Sergei Korolev successful in the design of a glider capable of performing aerobatics?
Did Sergei Korolev land a job after working on glider capable of performing aerobatics?
In 1930 Sergei Korolev became interested in the possibilities of liquid-fueled rocket engines to propel airplanes while working as a lead engineer on the Tupolev TB-3 heavy bomber.

Question: What did he do with that interest?
Self-contained rewrite: What did Sergei Korolev do with that interest in the possibilities of liquid-fueled rocket engines to propel airplanes?