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2. List of radio-controlled model aircraft kit manufacturers

   en.wikipedia.org/wiki/List_of_radio-controlled...

   Many notable individuals in the 1960s through the 1990s and beyond created the landscape of modern RC modeling. These included many starting their own companies. The families of many of these individuals lost interest in continuing these businesses. The incoming supply of ARF planes from overseas made it hard to sell kits requiring assembly.

3. Free flight (model aircraft) - Wikipedia

   en.wikipedia.org/wiki/Free_flight_(model_aircraft)

   F1B Model by Stepan Stepanchuk. Free flight is the segment of model aviation involving aircraft with no active external control after launch. Free Flight is the original form of hobby aeromodeling, with the competitive objective being to build and launch a self controlling aircraft that will consistently achieve the longest flight duration over multiple competition rounds, within various class ...

4. List of model aircraft manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_model_aircraft...

   Premier Planes (UK) Premiere (UK) Profiline (Czech Republic) Pro Modeler (USA) - brand of Revell-Monogram; Pyro Plastics Corporation (Pyro) (USA) PZW (Poland) Rare-Plane Detective (USA) RCR Models (Italy) Red Star (UK) Red Wings (Russia) Renwal (USA) Retrowings (UK) Revell (USA) Revell-Monogram (USA) Revell of Germany (Germany) - split from ...

5. Radio-controlled aircraft - Wikipedia

   en.wikipedia.org/wiki/Radio-controlled_aircraft

   A radio-controlled aircraft (often called RC aircraft or RC plane) is a small flying machine that is radio controlled by an operator on the ground using a hand-held radio transmitter. The transmitter continuously communicates with a receiver within the craft that sends signals to servomechanisms (servos) which move the control surfaces based on ...

6. AutoCAD DXF - Wikipedia

   en.wikipedia.org/wiki/AutoCAD_DXF

   DXF was introduced in December 1982 as part of AutoCAD 1.0, and was intended to provide an exact representation of the data in the AutoCAD native file format, DWG (Drawing). For many years, Autodesk did not publish specifications, making correct creation of DXF files difficult. Autodesk now publishes the incomplete [3] DXF specifications online.

7. .dwg - Wikipedia

   en.wikipedia.org/wiki/.dwg

   FreeCAD is a free and open-source application that can work with the DWG files by using the proprietary ODA File Converter for .dwg and .dxf files from the Open Design Alliance (ODA). [55] The ODA also provides a freeware stand-alone viewer for .dwg and .dgn files, ODA Drawings Explorer, which runs on Windows, Linux, and Mac OS X.