Eagle R&D has the option of translucent fuel tanks instead of the standard grey opaque tanks. The translucent tank has the advantage of letting the pilot see how much fuel is actually onboard at a glance. A disadvantage may be that sunlight could deteriorate the fuel if left to sit for a very long time in the sun. My thought is that I will actually burn through fuel quite rapidly, and if I don't, I will then just drain the fuel. I thought about painting or applying a decal to the tank with a fuel level indicator. Research tells me that a decal or paint will bubble and come off eventually due to gas fumes permeating the plastic tank. I found a product called "Caswell Tank Sealer" that can be applied to the inside or outside of the tank to prevent this from happening. Some reviews of the product revealed some failures from certain users. Whether this was from improper mixing or preparation, I'm not sure, but I surely don't want a product failing inside my fuel tank and causing a flameout mid-flight. I opted to coat the outside of the tanks with the Caswell Tank Sealer and then apply a fuel gage decal to the outside of the tank once I know what level specified amounts of fuel reach when filling the tanks. I first rough sanded the outside of the tank with 150 grit sandpaper. The tank was then cleaned with acetone, preparing it for the tank sealing compound. A small paint roller and foam paintbrush were used to apply the sealer. I added the appropriate amount of Xylene to keep the 2 part system from drying too quickly. I easily had 45 minutes of working time and was able to finish without being rushed. I did have to watch for drips to form and roll them out for about 1.5 hours. I kept my garage at 70 degreef Fahrenheit.
