The pump will quiet down when it gets filled with fuel and pressurized, but it will still be an electric rattlesnake that will make some noise.
The floor and walls of the fuselage are just like the sounding board in a piano or guitar. You must remove any hard contact between the pump and the sounding board to reduce the noise. I believe that the best way to isolate the pump is to enlarge the mounting holes, install rubber grommets, then bolt through the grommets with a flat washer in top. This is the same principle as the car manufacturers that use rubber air springs to prevent the road noise from the wheels from getting to the body panels in the passenger area. Jim Vance va...@claflinwildcats.com
