Here is a quick test of the chopper motor out of my new Thunderbolt 1000T. While I do own the whole unit and should have a test of that up within the next few days. I had to take the chopper motor out of the siren because it would not come on after transporting it back home. The next run up will be much louder, as this was filmed at 11:00 PM and I didn't want to disturb the neighbors. There will also be a thread up soon with pictures and history. Hope you enjoy .
https://www.youtube.com/watch?v=vozIHhuz5qw