Kitplanes Magazine is a magazine of kit and amateur-built aircraft construction. Contributions are mostly by aircraft builders and recognized experts active in the field. They accept articles on all phases of aircraft construction, from basic design, to flight trials, to construction technique in wood, metal and composite. They also review and analyze products and services related to amateur-built and kit aircraft construction. Short, focused technical articles are always welcome. The typical major feature runs 2000-2500 words. You must query first. They previously indicated to pay $250-$1,000, but current rates are unclear. Details here.