Hello. I have a couple of questions concerning gas conversions. I am planning to build a Cessna Agwagon that has an 80 inch wingspan and a 55 inch fuselage. The 60 inch span version calls for a .40-.45 engine. I have a Weed Eater 18cc engine that's about 4 years old. I don't know what the final weight range would be for the 80 inch version. My questions are:

1. Will this engine work for a plane that size? If not, what size (cc) do I need?
2. Is this engine even worth converting?
3. Is there a chart/scale that shows (x)cc = (x)ci, as far as power output? (Not a math equation)
4. Is there a chart/scale that matches prop size to cc?


Thanks in advance for all of the info...

DF