 Item Number SCP-3952 Object Class Euclid Special Containment Procedures SCP-3952's area of operation is to be monitored by ground-based radar at all times, with civilian aircraft diverted from SCP-3952's flight path. As the main risk from SCP-3952 is its threat to normalcy, containment procedures revolve around concealing its anomalous characteristics. Site-1922 has been established with the guise of a private vintage aircraft restoration organization – Society for Conservation of Planes. In order to provide a plausible explanation should the existence of SCP-3952 come to the attention of any individual, with at least one aircraft resembling SCP-3952 in constant operation. All efforts to apprehend SCP-3952 have been suspended indefinitely. Two AN-TWQ-1 Avenger surface-to-air missile systems are stationed at Site-1922 in case of emergencies. Description SCP-3952 is a modified Boeing-Stearman Model 75 biplane trainer aircraft. It has been painted in the livery of the British Royal Flying Corps, although the RFC did not operate this model of aircraft. World War I-era precursor to the Royal Air Force Two 7.7mm Bikker's machine guns and makeshift gun synchronization apparatus have been mounted on the nose. SCP-3952 is constantly airborne without any requirement for fuel, ammunition, or maintenance, and flies in a random pattern with a 400 km2 area in northern Minnesota, USA. In addition to flying without clear direction or purpose, it performs aerobatic maneuvers, flies in a manner resembling aerial combat, and occasionally discharges its guns at no specific targets. While SCP-3952 is not hostile unless provoked, it displays further anomalous properties when threatened, including flying at speeds of up to Mach 3, resistance to forces of up to 12Gs, and extreme turning capabilities in aerobatics such as the Pugachev Cobra maneuver, in which an aircraft raises its nose vertically while maintaining constant altitude. In these situations, it has also been observed to exhibit localized reality-warping capabilities involving short-distance temporal and spatial displacement, incorporeal-incorporal phasing. Foundation forces are prohibited from engaging SCP-3952, following the loss of two F-15C fighters operated by MTF Sigma-9, Valkyries. The pilot of SCP-3952, designated SCP-3952-1, is a white, mid-sized adult specimen that can be familiar as Domestic Dog. Obtaining further specifics of SCP-3952-1 is proven problematic, as close attempts at monitoring tends to provoke threat responses from SCP-3952. SCP-3952-1 operates at controls with its paws, although its movements do not completely correspond to the maneuvers made by SCP-3952. SCP-3952-1 no requirement for sustenance, and does not exhibit to discomfort that would be expected from a non-nomous member of its species in the same situation. Like SCP-3952 itself, it demonstrates resistance to high speeds and G-forces. Addendum 3952-1 SCP-3952's origin has been linked to POI-17897, Francis K. Lin, 1930-2002, a peripheral member of the NRS community in the Midwest and hobbyist pilot. Although his connections to SCP-3952 were not suspected until after his death, investigation of his estate and personal effects found purchase information for an aircraft of SCP-3952's model. Vintage weapons identical to those observed on SCP-3952, and various paints and tools for aircraft maintenance. Additionally, it was noted he previously owned a dog, Joe, matching SCP-3952-1's description from the late 1980s until its death in early 2000 and natural causes. The remains of this animal were exhumed and found to be non-anomalous. It remains unclear if and how POI-17897 was responsible for SCP-3952's creation. However, the following message in POI-17897's handwriting was found amongst its personal documents. Document 3952-1 It's a cliché to say those who have left us are somewhere up there looking down on us, but in your case I can believe that. I know the plane isn't quite right, but it was the best I could do. At least I didn't try and put the hat and goggles on you. You're going to be world famous, even though you were always cooler than I was. The nights are dark and stormy without you, my friend.