Client: Discovery Channel Canada's Daily Planet
For Daily Planet's 'Greatest Show Ever' on Discovery Channel, teams from across the country competed to create the most dramatic experiments conceivable for television.
Demonstrating how silos can literally explode, 60lbs of cornflour are launched into the air using two propane tanks retrofitted to accept pressurized air. A high-speed, large-gauge solenoid valve allows the air in the tanks to propel the flour out of a "cannon", which used to be an industrial water heater. The fuel passes an ignition on its way out of the "cannon".
Adhering to the principals of the fire triangle, the fuel (flour), ignitor (flame) and oxygen (in the air) combine in perfect ratio to produce a spectacular fireball reaching over 50 feet high. This effect is similar to how a spark from a cigarette can ignite a silo full of dust.