Check out this howto on making your own Penny Stove for your next camping trip instead of buying one from Wal-mart. It is as powerful as stove top burners!
The Penny jets produce a flame size about the same as those on a Viking stovetop. Obviously Viking thinks that big jets must be an effective way to burn gas and transfer heat to a pot and my tests confirm this. They are also less affected by wind, pot distance, altitude and the dirt that accompanies all backpacking trips.