Brown Co2 Twin Motor, Tank Prop and Fill Valve For Free Flight Model Airplanes. This motor was received with other Co2 motor related items in a friends estate sale.It shows no signs of being run or mounted. As precautionary, I've listed it as used but it appears to be new. Please see the photos for the details on this sale. The item "Brown Co2 Twin Motor, Tank Prop and Fill Valve For Free Flight Model Airplanes" is in sale since Sunday, November 7, 2021. This item is in the category "Toys & Hobbies\Radio Control & Control Line\Control Line & Free Flight". The seller is "jetfixer2012" and is located in Walls, Mississippi. This item can be shipped to United States.