If you like the sounds of a radial engine you need to take a ride in a Ford Tri-Motor. Had a chance to ride in one about 4 years ago and it's as good as it gets for any Ford guy. Best money I ever spent on a plane ticket.
Tom (TJ), when our RG hosted a WNM at Coeur d'Alene we had the Evergreen Trimotor come over and people could pay for rides. I had a ride on it, was like a Harley with wings! Don't know who owns the plane now. They gave us a certificate stating we flew on the same airplane that was the first airliner to go across the US and on that first flight both Amelia Earhart and Charles Lindberg were passengers.
1965-1967 I worked on the flight deck of the USS Lexington CVS-16, got to hear a lot of radials. I guess that's where my love affair with them began, T-28s, S-2s, A-1s. The jets, not so much, my ears still ring to this day.As a young A&P, I rebuilt radials and test ran them. We used NOS ww2 parts! From a Canadian warehouse-1977. Newc