The draft was initiated after deriving the requirements to Tu-22 successor. S.M.Yeger's department of Tupolev Bureau was responsible of it. Preliminary calculations had shown that the necessary parameters may be achieved in the case of providing supersonic drag to lift ratio not less than 6 and subsonic one not less than 12. As soon as the flight would to take place under very severe conditions: high temperature and high air flow loads obviously used materials couldn't been used. Titanium and steel structure elements had been planned. The work on this project continued until the mid of 60th just to the moment when military men rejected the tactics of high altitude supersonic attack. It's interesting that this plane was under developement parallely with 1/3 lighter "135" bomber which was to have the similar shapes. There exist an opinion that these works caused the appearing of Sukhoy T-4 bomber as a competitor.