Then, take one of the manila semicircles and line the straight side along the edge of your work surface, with the curved side away from you. Hold a finger point in the middle of the straight side to act as an anchor point, then use your other hand to roll one side of the semicircle on the edge of your work surface. The piece should spin around your finger like a wheel. Sorry if the pictures aren't clear! Make sure the pipe is centered and level, and that it extends at least a foot above the top of the stove. The final piece you need is to create a line so you don't lose your nose cone, and a parachute for recovery. This can make it difficult to maintain the appearance of the stove, and it can also make it difficult to ensure that the stove is safe to use. By entering this competition, an entrant is indicating his/her agreement to be bound by these terms and conditions.

An ash pan catches loose ash and prevents it from clogging theairflow. It acts as a heat shield and prevents your stove from scorching the ground. Vent holes near the top of the burn chamber allow preheated oxygen to fuel the flame resulting in a more complete combustion and a hotter fire with less smoke. Cut a hole in the side of the big tin about 3cm up from the bottom. The hole should be the same diameter as the small tins. Now when you blow up a balloon, the air makes the balloon stretch bigger and bigger. But the little film canister doesn't stretch and all this gas has to go somewhere!The semicircle should begin to look like it's curving into a cone shape. You can begin making the cone tighter, working it until it matches the diameter of the body tube. Use clothespins to hold the cone in place while you glue the flap down. Once you're satisfied with the stove's performance, you can use it to cook, boil water or for heating in emergency situations.

The winner agrees to the use of his/her name and image in any publicity material, as well as their entry. Any personal data relating to the winner, or any other entrants will be used solely in accordance with current [UK] data protection legislation and will not be disclosed to a third party without the entrant’s prior consent. Wrap and tape a tube of paper around the film canister. Hint: Tape the canister to the end of the paper before you start wrapping. Also, it is much easier to transport than a regular oven, making it perfect for camping or hiking trips.The combustion chamber is where the fuel is burned, and it is designed to create a high-temperature, high-pressure flame that is directed towards the heat-exchange chamber. Motors have different letter classes based on their total impulse, with I being the lower end of the high-powered spectrum The heat-exchange chamber is where the heat from the combustion chamber is transferred to the incoming air, which is then directed out of the chimney as exhaust.