Photos again, resized to be less than 100K. Sorry about that.
Lenz Education Turbine Setup on the first project day

Component testing of custom alternator stators and rotor setups

The Wind Tunnel - for low velocity and low cost
Note fans draw air through the tunnel to avoid turbulence. Constructed of art foam board with an inverse contraction cone at exit. No contraction cone at air supply means students need to stay away from the opening to avoid inbound turbulence and other unwanted variances. You can also see a three prop turbine built from acetate sheets around aluminum air foils from the craft store. Haag-Streit anemometer in left foreground, and strobotach reflector in right foreground.

Battle