This post is brought to you courtesy of Dirk de Beer who wrote to me in response to my Creative Uses for Airships post. I mentioned the need to develop aircraft detection technology real fast and Dirk pointed me towards a site that has splendid examples of just that.
To be more precise, the examples all show devices intended for the detection of aircraft before radar was invented. I can highly recommend it, it is quite an eye-opener, or ear-opener, as the case may be) and a shining example of human ingenuity, even if it is missguided.
Please saunter over here and enjoy! Strange technology at its best!
So, my sincere thanks to Dirk and as an appetizer, here is one of the devices displayed in the article: