In this run, the maximum distance the fan with a completely packed duct containg 11 rings of collimators attached can blow out the test candle is measured at ~ 8.5 feet.
This laser uses an open can diode from a 20X LG DVD Burner. The laser has a heatsink made out of washers soldered together and then soldered around the collimator. To drive the fan off of 2 AA's i used a small boost circuit.
Video duration: 33 seconds
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LaserBox v. 3.1 burning my desk! Power input is 120mW. Axiz acrylic aspheric collimator so output is about 100mW give or take. Beam is well focused here. Great burning power!
