Been years since I've heard a radial, only hear an aircraft every couple of months. Radials used to be used on AG a lot, mostly turbine now. Turbines are more reliable and usually more power/performance with pointy nose instead of blunt. Flying turbines is not the same, you switch them on and switch them off. Radials are all individuals, all have slightly different way to start. You coax them into life. When you shut down after a long days work the silence is deafening apart from the ticking crackling exhaust. I have only flown single row radials, I spose twin row are even more particular Nev?
I do miss flying radials......😕