Hi! Sukhoi T-5.
http://www.ussr-airspace.com/index.php?main_page=product_info&cPath=28_39_38_97&products_id=1558
https://en.topwar.ru/65849-sverhzvukovye-perehvatchiki-p-o-suhogo-chast-iv.html
"In the air regiments of the Su-11, they served until the middle of the 70-s and were gradually superseded by the MiG-23P and the MiG-25. The few Su-11s were the transitional machine between the first in practice Sukhoi Design Bureau supersonic interceptor and the more advanced Su-15, which earned the title of "classic" in air defense. The rapid withdrawal from serial production, which was caused by problems with the reliability of the Su-9 marines, did not bother P. O. Sukhoi, but on the contrary, stimulated him to develop a new machine.
Naturally, the search for an alternative power plant, and more than that of the AL-7F-2, was started. Almost at the same time, at the turn of 1959, the design bureau began to design a heavy T-37 fighter with a TRX Р15-300 and an interceptor P-1 with a power plant consisting of one AL-9.
In the same period, tested and aircraft T-5, which was the development of T-3-51. T-5 retained the wing, tail, nose and central parts of the base aircraft, but differed from T-3-51 in a power plant consisting of
two P-11F-300 engines designed by the Tumansky Design Bureau (similar engines were installed on the MiG-21). In 1958, the tests of the T-5 began. At the same time, the new machine was not considered by Dry as a ready interceptor, it was an exclusively experimental aircraft. T-5 had a lot of limitations due to rear alignment, so it was not possible to fully disclose its capabilities in all modes. One thing was certain, the new aircraft had a great power supply and rate of climb.
Interestingly, a similar evolution took place some time later through the experienced single-engine interceptor E-150 of the OKB A. I. Mikoyan, on which the Р15-300 engine was replaced by a R-11F-300 engine. The new Mikoyan aircraft received the name E-152, and its scheme was identical to that of the T-5 (a common axisymmetric air intake in the forward fuselage, two engines in the tail section and a delta wing of small elongation). In addition, at the end of 60-ies in China built a heavy interceptor, also performing it on the type of T-5 and with the same engines P-11-300. As you can see, the T-5 scheme was rated as very promising, but P. O. Sukhoi went even further."