“I would test it each time he tinkered with it. It ran on butane, but really jumped high when we once used a mixture of acetylene and oxygen! He used a model ‘A’ Ford spark coil which delivered quite a few volts to the unprotected spark plug – as I once found out when my zipper came in contact with it briefly. I haven’t had a thrill like that since!”
Sadly, the high-jumping ‘Hop Rod’ was eventually withdrawn from commercial production due to safety concerns.
Nonetheless, despite possible doubts regarding safety issues, research and development of other alternatives for powered-pogo-sticks has not stopped – work has progressed at at least three universities.
University of California, Berkeley, US – The Pogomatic
“A pneumatic cylinder was chosen as the actuator for the pogo stick. There has been much research on electric linear actuators and jumping machines,”
Carnegie Mellon University, US – The Bowgo
“…a new kind of pogo stick that bounces higher, farther and more efficiently than conventional devices.”
Université de Sherbrooke, Canada – PSEUS project (Pogo-Stick Extreme of the University of Sherbrooke)
“…we have built a powerful device which allow [sic] us to archive [sic] the initial idea: a higher leap of around 8 ft of [sic] the ground.”