Hello i am building a ESM Spitfire 72.5 inch and would like some recommendations on engines. I would like the plane to sound like a plane. I would also want the engine to stay in the cowl and not exposed. Should i stick with 2 stroke, 4 stroke, or gas. What size would you recommend. Please keep in mind that this plane will be flown as a scale plane and no 3d will be performed as i believe if you want to do extreme aerobatics you build a plane to suit. Your help will be much appreciated.