The Long Range Drone Rainger Test
When we were developing the Drone Rainger, we got to the stage where the two drones sounded great, the delay adding a fantastic ambience to them… All was good, except over a period of time - only minutes - the pitch of the drones would rise…
This was disastrous!
While the pitch of each tone generator could be precisely tuned, once you’d done that you really didn’t want that pitch to drift. So with a lot of trial and error we finally pinned down what we thought was a stable system (all to do with the tone generators’ power supply).
It sounded good over minutes, and an hour, but what would it sound like over days??!
So the next morning we started the Long Range Drone Test. We turned it on, and had it gently humming away in the background all day - regularly checking it with a guitar tuner. At the end of the first day it was holding the tuning well, so we left it on overnight.
The next morning I opened the workshop door to be greeted by a reassuring low-pitched ambience. All was good - and for the rest of the day too, so at the end of the afternoon we decided to leave it to carry on through the following night….
On the morning of the third day, I can’t remember why but I’d decided to take the train in to work, and as I exited the station I saw a strange large flexible tube lying in the opposite gutter of the road. I followed it up the road, and there - round the corner - was a London Fire Brigade catering van.
This was great to see - free coffee and doughnuts is always welcome - and yet, at the same time it was also very bad……
At the actual entrance to our road were two fire engines parked at angles, closing off the road with generators thundering and their lights flashing, and there, on the right, was our workshop building IN FLAMES!!!!!!!!!!!!!
My immediate thought was to grab the nearest firefighter and shout, “BUT WERE THE DRONES STILL IN TUNE???!......” but they were obviously too busy.
Our test had actually gone very well overall (we did carry on testing that unit). Right up to when the wedding supplies shop at the back of the building had caught fire, and the power was turned off.
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Blog by David Rainger