Does anyone watch "Horizon" from the BBC? In one of their latest shows they have a glider attached to roll of string that is using wind power to pull the string connected to a generator. It says it then uses 5% of the energy to wind itself back up.
Does anyone watch "Horizon" from the BBC? In one of their latest shows they have a glider attached to roll of string that is using wind power to pull the string connected to a generator. It says it then uses 5% of the energy to wind itself back up.
... couldn't find it.
Here is some reading on the topic, for starters.
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