Located in Bad Homburg, Germany,3W-International is a company focused in marketing and selling 3W-ModellmotorenÂ’s 2-stroke heavy fuel and gasoline engines to the industry. 3W-International GmbH signed exclusive contracts with 3W-Modellmotoren GmbH for marketing and selling the complete line of heavy fuel engines and gasoline to the industry world wide, production and R&D of HF-Engines and gasoline engines, and purchase of 3W-Modellmotoren GmbH Â’s patents in Germany and USA.