That’s the Scheutzow B helicopter. Webb Scheutzow had designed and obtained type certification as essentially a one man effort.
Webb was a former Kellett engineer who dropped dead of a heart attack at Sun ‘N Fun in the late ‘70s or early ‘80s.
The final reduction was a gang of high power “V” belts, not as efficient as Gates Polychain.
The Hunt Brothers of Texas had purchased manufacturing rights after cornering the silver market, but the bottom fell out of silver and the Hunt Bee never went into production.
Some “promoters” in West Palm Beach had purchased whatever tooling and components as the Hunts had along with a prototype but had neglected to purchase the type certificate.
It’s a long story but the prototype ended up spending several months in Ernie Boyette’s front yard in WPB.