page_title: Payen Pa 49
section_title: Operational history
hierarchical_section_title: Payen Pa 49 / Operational history
caption_attribution_description: Français&#160;: Avion expérimentatal français Payen PA 49 Mise au point de l'aile Delta sur un avion à réaction (1951), Musée de l'Air et de l'Espace, Paris Le Bourget (France) English: French experimental aircraft Payen PA 49 (1951), Museum of Air and Space Paris, Le Bourget (France)
context_page_description: The Payen Pa 49 Katy was a small experimental French turbojet powered tailless aircraft, first flown in 1954, was the first French aircraft of this kind and the smallest jet aircraft of its day.
context_section_description: The first flight of what was now the Pa 49A took place on 22 January 1954 at Melun-Villaroche flown by Tony Ochsenbein, a comparatively inexperienced pilot, who had previously logged only 30 minutes on jets. Ten hours of manufacturer's testing was followed, in April 1954, by assessment at the Centre d'Essais en Vol (CEV), Brétigny-sur-Orge. The aerobatic ability of the Pa 49 was established.  At the CEV it was fitted with a split rudder airbrake; the two surfaces of the rudder separated from just below the tip, driven via faired external links near the bottom, into a V at the hinge for braking, rotating together for yaw control. This airbrake was designed by Fléchair SA, a company founded by Payen.  At the time of its appearance at the 12th Salon International d'Aeronautique at Paris, in 1957, the undercarriage legs were faired and the main wheels enclosed in spats and the aircraft renamed the Pa 49B.  For a time the nosewheel was also spatted. There were plans for a version with a retractable undercarriage, but this did not come about.
  When the flight testing programme ended in 1958 Payen gave the aircraft to the Musée de l'Air et de l'Espace at Paris - Le Bourget Airport.  He continued to design delta winged aircraft and the Payen Pa 71 and Pa 149 projects of the 1970s were direct developments of the Katy.
caption: The Pa 49 Katy has been in the Musée de l'Air at Le Bourget since 1958
exif: {"Image Make": "Panasonic", "Image Model": "DMC-G1", "Image Orientation": "0", "Image XResolution": "180", "Image YResolution": "180", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Picasa 3.0", "Image DateTime": "2009:02:12 14:23:38", "Image YCbCrPositioning": "Co-sited", "Image ExifOffset": "572", "Image PrintIM": "[80, 114, 105, 110, 116, 73, 77, 0, 48, 50, 53, 48, 0, 0, 14, 0, 1, 0, 22, 0, ... ]", "Image Tag 0xC6D2": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ... ]", "Image Tag 0xC6D3": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ... ]", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "8544", "Thumbnail JPEGInterchangeFormatLength": "5347", "EXIF ExposureTime": "1/6", "EXIF FNumber": "22/5", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "400", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2009:02:12 14:23:38", "EXIF DateTimeDigitized": "2009:02:12 14:23:38", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "4", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "1095/256", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "20", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "Uncalibrated", "EXIF ExifImageWidth": "3879", "EXIF ExifImageLength": "1972", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "8420", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "0", "EXIF FocalLengthIn35mmFilm": "40", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "High gain up", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF ImageUniqueID": "f29ee728be720f392c3ad2d8085667e5"}