Our modern age has seen several designs for propeller-driven trains. And cars. And a bicycle. And even a sled! See them all at deputy dog. http://deputy-dog.com/2007/09/27/7-unusual-propeller-driven-vehicles/
The heading says 7 unusual prop-driven vehicles, where's the other 6, even including the not unusual camera equiped, multi prop "spy drone" i couldn't locat the other 5. So how do i find them?
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