At 02:38 PM 5/11/2011, you wrote: >I will use one UL power at 107 hp and weight only 159 >pound+oilcooler. I just love this engine. >I want to have any fuel in my wings, so I have a question I hope >someone can help me on. >The fabric who deliver the engine will make a engine mount for me. >The fuel tank in the front is removed and the engine is lighter, >how far forward do I have to bring the engine to bring the right CG? >++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I saw one or two post to your question and one suggested you install the engine and do a W &B to determine location. I see no point in building two engine mounts. Do a complete W&B series without the engine, complete with fuel and pilot and passenger, and then determine the engine location using paper and pencil. Use the center of mass of the engine for the moment arm and don't forget the weight and arm of the mount, cowl, prop, spinner, battery, etc. The front two or three inches of the CG range would be a good target with pilot and fuel if adding a passenger doesn't move the CG beyond the aft limit. Larry Flesner
