Hi LoTOM,

Actually I made the firewall myself out of 6mm CF and Nomex sandwich material. Only drawings were included with my kit also. Also the drawings show another type of firewall than I wanted, so I made a cardboard template, and when satisfied with the fit I transferred it to the Nomex sandwich plate.


Regarding the fuel tank. The models CG is located 210mm's from the leading edge of the wing measured at the root; where the wing meets the fuselage side. This equates to 52mm's behind the rear edge of the wing tube.

You are correct that the fuel tanks CG is located forward of the models CG. I do this for the following reason: The models CG is measured with an empty fuel tank, and it's NOT a good idea that the models CG is moved backwards when you fill the fuel tank. Therefore I make sure that the fuel tanks CG is forward of the models CG.

I hope this made sense...?

By the way, the root cord of the wing is 475mm's, this means that the models CG is located approx. 44% from the leading edge.

I have attached a picture showing the location of the fuel tank on the designers Rhapsody Competition. His fuel tank is located even further forward...