Fuel Tank

Current Design

The current design includes a welded steel fuel tank with fuel capacity of 1.6 Gallons:

(3.5" x 7.5" - (pi x( 0.5)^2)) x 14.5 / 231 = 1.59 Gal

Off The Shelf fuel tank

SurplusCenter.com sells a 5.5 gallon "off the shelf" fuel tank for $40:

Item# 28-1756

Based on the given dimensions, I jammed together a Sketchup model and fit it into the Power Cube:

It could work, though we'd have to work out redirection of exhaust and mounting.

Update: This fuel tank is no longer for sale.