November 8, 2011

building the low tunnels

We have two kinds of benches, wood sided and metal sides.  
The wood ones are way easier to drill into, but either way setting up hoops on them is pretty easy.  

We used:

9' long pieces of 1/2 inch PVC
metal brackets
tech screws or metal to wood screws

The bottom of each bench is covered with a layer of clear plastic since our goal is to build a sealed chamber.  The plastic is a bit brown because it had been used once in the field.  Next we covered each tunnel with a different kind of cloth or plastic to see what effect they would have on internal temperatures.  Each tunnel has a temperature sensor that measures temperature on the hour so all we have to do is sit back and wait.

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