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Learning to walk before you run. The Pogo getting ready for its indoors tests inside the humongous dirigible hangar at Moffett Field, California (June, 1954). The aircraft was suspended from a tough cable which was attached to the propellers hub. Other cables were attached to the wings and fins to stabilise the prototype. The whole idea proved to be a failure; the XFY’s props generated too much turbulence and the tests continued outdoors.
….., but you are not a Pogo. Keep Safe.
Aviation Rapture 
Don’t be a Pogo stick – stay safe yourself!
Trying to. You too.
Skeets Coleman made it look so easy with his unteathered flights!
Too easy.
In french, ‘po-go’, is: ‘petites ondes-grosses ondes’, ‘small waves-big waves’, referring both to radio broadcasting and stationary waves.
They had a problem possibly connected to this in losses of Ariane launchers, from faults in pumps that handle fuel inside rocket.
When I was a kid, I watched something similar in a water pump powered by a ‘Campeon’ single cylinder Diesel engine, because of a failure in the non return valve, aka: ‘alcachofa’, ‘artichoke’, in the pit side end of pumping tube, the pump entered a cyclic oscillaiton in water delivery and engine speed. Salut +
I remember those Ariane’s tribulations. The 1st stage (S-IC) of the Saturn V and the Titan II-Gemini both had also initially Pogo problems,