The container is composed of a basic Nalgene® water bottle containing the fuel, and an outer shell of drain pipe padded with fire retardant Great Stuff®. This combination has survived a 30 mile an hour impact, the standard for fuel tanks, and sustained only an insubstantial fracture on of the outer shell that did not create a fuel leak. Even in a fire situation which we created with the assistance of a local fire department, the container withstood direct exposure 1400 degree fire for 5 minutes while placed just 3 inches from the source of flame. After this, the outer shell was burnt, but the inner Nalgene® was still intact.
Our invention is not just a container, but also an alternate fuel, which consists of methanol and mineral spirits. This mix has a high enough octane rating to prevent knocking or misfiring of the engine, and a high flash point, meaning that the liquid will not vaporize fast enough to become a fire hazard.
First off, you need to gather the materials:
Fire resistant Great Stuff® (a type of expanding insulation)
9 inches of 4" diameter PVC pipe
2x 4" diameter PVC pipe end caps
A standard 1 liter Nalgene® bottle
Basic funnel for easy pouring
600ml of mineral spirits
400ml of methanol
Step 1: Making the caps
-Your two 4" PVC endcaps
-Lots of paper towels
WARNING: Great Stuff® is extremely sticky, so wear gloves and eye protection while using it. Also, it is practically impossible to clean great stuff off of a surface, so put down cardboard or the like while making the caps.
1. Place the caps upside down on a flat surface.
2. Apply great stuff in a small dome inside the cap, leaving plenty of room from the edges as it expands. Keep the great stuff away from the inside edge of the cap, as this will prevent the cap from working properly.
3. Repeat with second cap.
4. Leave both caps to dry undisturbed for 12 hours (overnight is recommended).
5. After the caps have dried, you may want to drill a small (1/4" hole) in one endcap through the plastic and Great Stuff®. This will make it easier to remove the cap as it prevents the container from forming a vacuum.