The world (in)famous noise making device

 

A problem faced by the US Forest Service when cargo is delivered by air to remote forest locations is loss of the cargo in heavy timber and brush. This device was designed to be able to withstand low altitude dropping from an aircraft without a parachute and produce sound for several hours after impacting on the ground. Testing demonstrated that the device had a high probability (> 95%) of surviving under non parachute conditions and virtually 100% chance of survival under parachute conditions. The device was designed to be assembled by relatively untrained personnel using materials that could be purchased at a local hardware store. The device cost a few tens of dollars to make and resulted in considerable savings in lost timeand and timber loss when used to air supply Smokejumper operations.

 

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