50 years ago I was taught to use 20 flap and 60mph for a normal powered approach in the Cessna F150, although we also practised 40 flap 50 mph short landings (2000 rpm). The aircraft certainly would go around with 40 flap at 50 mph; at 200 ft we accelerated to 55 mph and reduced to 30 flap, then 60 mph before reducing to 20 flap, then 65 mph before reducing to 10 flap, then finally accelerating to 70 mph before continuing a clean climb...
BUT,
The aircraft were brand new, usually with around 20 hours on them since leaving Reims. The props were also brand new - and most of us weighed rather less back then!