Lived about 30 years in an active farming region with sprayers and dusters working all year round.  
There were Cubs and Stearmans, and one Waco. I spent one summer as a flagger/loader for a company with a Stearman and a Waco. Near the end of that time the designed-for-the-purpose planes arrived, but no helicopters or turboprops yet.
During that whole time it was rare to not hear a radial engine in the distance every morning.
Bruce
	
		
			
		
		
	
				
			There were Cubs and Stearmans, and one Waco. I spent one summer as a flagger/loader for a company with a Stearman and a Waco. Near the end of that time the designed-for-the-purpose planes arrived, but no helicopters or turboprops yet.
During that whole time it was rare to not hear a radial engine in the distance every morning.
Bruce
 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
					
				 
						
					