A large twin-engined biplane, its most interesting feature was the arrangement of the defensive armament.
Each extension housed a gunner's cockpit at its extremity, fitted with a gun ring.
[1] The Sinaia was a three bay (with struts to the upper wings from the engine nacelles) biplane.
The square section fuselage placed the pilot's cockpit well forward of the engines and a third gunner's position in the extreme, slanted nose.
Unsurprisingly this little-tested powerplant proved unreliable and frequent problems with it interrupted the flight trials of the Sinaia, which flew for the first time on 25 June 1921.