I don't post stuff like this unless I have first hand direct knowledge. I can verify that I have personally heard stories of 2 different flyers who did testing in a park. I suppose they both could have been making it up but it seems unlikely. And while I agree that ejection charges are generally not super loud, one of them was for a very large L3 bird and as described was very loud, so much so that those involved immediately packed up and left the area. The flyer involved was no novice either, he is very experienced.
Even testing in ones yard does not mean you are safe from neighbors who decide to call the police who are then obligated to investigate. I was testing ignitors in my back yard when my neighbor came over concerned about a possible fire. Fortunately he knew about my rocketry so it wasn't a big deal. But if he had called the police or fire department I would have had some explaining to do.
Just go to youtube and watch all the ejection charge testing videos that are posted to get an idea of all the places that folks test ejection charges. Some are clearly done in parks or other public spaces. Others are in back yards in apparent close proximity to neighbors.
My point is to take reasonable precautions and don't test where you don't have permission or might raise alarm.
Tony
