Mikoyan-Gurevich I-320

The I-320, bureau designation Izdeliya R and given the American designation Type 18, was a Soviet long-range all-weather interceptor prototype of the late 1940s and early 1950s. It answered a January 1948 specification that also produced the Lavochkin La-200 and Sukhoi Su-15. Like its rivals it was a twin-engined swept-wing aircraft with one engine low in the forward fuselage and one in the rear, fed from a nose inlet that split into three ducts, and a crew of two sat side by side. The R-1 flew on 16 April 1949 with Klimov RD-45F engines and the R-2 followed in November 1949 with VK-1 engines. Only two were made, no production followed, and the prototypes served as avionics testbeds.