P-51B Mustang

    P-51B Mustang

    TAMIYA model kit for the construction of an US P-51B Mustang aircraft of the Second WW, in 1/48 scale.

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    Plastic kit from TAMIYA, for the assembly of an US airplane of WW II, in 1/48 scale. Includes sprues with plastic parts, assembly instructions, clear parts and decals.

    Over twenty variants of the North US P-51 Mustang fighter were produced from 1940, when it first flew, to after the Second WW, some of which were employed also in the Korean War and in several other conflicts. Numerous examples of the aircraft survive to this day, often as warbirds or heavily modified air racers. A "duct rumble" heard by pilots in flight in the prototype P-51B resulted in a full-scale wind-tunnel test at NACA's Ames Aeronautical Laboratory. This was carried out by inserting the airplane, with the outer wing panels removed, into the 16-foot wind tunnel. A test engineer would sit in the cockpit with the wind tunnel running and listen for the duct rumble. It was eventually found that the rumble could be eliminated by increasing the gap between the lower surface of the wing and the upper lip of the cooling system duct from 1 to 2 in (25 to 51 mm). They concluded part of the boundary layer on the lower surface of the wing was being ingested into the inlet and separating, causing the radiator to vibrate and producing the rumble. The production P-51B inlet was lowered even further, to give a separation of 2.63 in (67 mm) from the bottom of the wing. In addition, the shelf above the oil cooler face was removed and the inlet highlight swept back.

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