Sonex Aircraft LLC is an American aircraft kit manufacturer located in Oshkosh Wisconsin producing kits for four all-metal homebuilt monoplanes. The company is led by John Monnett who has designed the Monnett Sonerai sport aircraft series Monnett Monerai sailplane Monnett Moni motorglider and Monnett Monex racer. Monnett designs are displayed in the Steven F. Udvar-Hazy Center of the National Air and Space Museum near Washington D.C.
