So far only a model has been seen of this high-speed VTOL vehicle, powered by tilting prop-rotors on the tips of its fixed unswept wing. The sensor would be under the forward fuselage, and the undercarriage would comprise a retractable mainwheel and small wheels on the tips of the ^-type tail.

Bill Gunston & Yefim Gordon "Yakovlev Aircraft since 1924", 1997