Ever heard of the Bells of Oshkosh? I just learned of them myself, it's pretty cool... a quintet of vintage Bell 47 piston helicopters — some dating back to the 1950s

up to 5,000 eager passengers willing to wait up to three hours and plunk down US $70 for five minutes of the show’s best views at 500 feet above ground level.

For the pilots who fly them, the 47s offer a chance to take the controls of a living piece of history while sharing their passengers’ delight. 

Chris Anderson is one of those pilots. His father Tim rebuilt and sold 47s from the family garage as a side hustle in the 1970s, including one that still flies AirVenture passengers today.

https://verticalmag.com/features/the-bells-of-oshkosh/