I have a Secomak I got about 10 years ago. The gear noise is almost as loud as the siren itself. There is a tolerance of around 1/4" which means it essentially is just leaking air. It makes a siren noise and the damper in front does create a pulsed signal of sorts, but by no means loud.......th...
Back in my not-so-smart days, I did a finger spin on a 10V that was lying on the ground. The dumb way. Meaning I tangentially pushed on the rotor via a port. The shock from the finger tip dangling off sideways made the pain disappear. The 5 hour drive (I wasn't driving) was not fun. The worst was th...
The difference in frequency in Hertz between the 2 sound sources will be the frequency of the pulses. If one rotor is doing 499 Hz and the other is doing 501 Hz, then there will be 2 'pulses' per second. Once you get above a certain range, the pulses become somewhat indiscernible as other harmonics ...
There'a a document in the National Archives that I was finally able to see and take photos of every page. Here it is for your viewing pleasure =) Approx 38 MB. http://civildefensesirens.com/Posts/OCD%20Siren%20Funds.pdf Going off cities with sirens system that I know, these seem to be how they gener...
I just suspended hen7713's account. The use of direct racially offensive terms is not allowed here. It is up to one of the moderators to decide what to do. Again, there was a time when no memes (internet images of cats, celebrities with a quote, etc.) were not allowed and I think it made the board m...
New Years sound off of the 5T on 120 volts and then the 1003 on chopper setting 1. Sorry for it being off-centered, I recorded it with my iPhone on the ground.