Its voting time again and the inspirational image was chosen by last months winner, @skankdelvar who is on a roll, and is approaching the hallowed ground of a treble! I'm no stato , but that's a rare thing round these parts , however we have some serious challengers for you to consider .      some notes provided by the man himself... Before radar was perfected, aircraft were detected using acoustic locators which enhanced and amplified the sound of an aircraft's engine.