Solar Empire – Endless War

1. 

   BoringMay 26, 2010 - 1:22 pm #1

   You use a parabolic mirror or get something shaped like a satellite dish with lots of tiny mirrors on it. You put the bottle in the focal point and it will boil very quickly. (about 2 mins)

   example below:
   References :
   http://www.youtube.com/watch?v=qbKtXdD5CBI

2. 

   PercyMay 26, 2010 - 1:58 pm #2

   Make a parabolic dish with a diameter of about four feet and line the inside surface with aluminium foil and focus its reflection on a glass bottle that is full of water (not a plastic bottle) and DO NOT put a cap on the bottle. The output of such a dish is more than enough to fry eggs in a couple of minutes, so it should be enough to boil a pint of water in less than 50 minutes.

   You could also make a heater from about fifty feet of 1/2 inch diameter black PVC hose but this would be more difficult and less safe to make for a school project.
   References :

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