Warm Up Times of Radial Engines.

[Viper2000]

Originally Posted by ElAurens

Was that a cold start as in the first start of the day?

And what was the weather like?

A "cold" start in the summer near Atlanta is a very different animal from a (genuinely) cold (and probably wet) start during a British summer, let alone (for example) a Russian winter...

[drewpee]

I don' know about aircraft engines but air cooled motorcycle engines warm up quicker than liquid cooled. Air cooled only have the sleeves and cooling fins to heat. With liquid cooled you have twice the amount of metal in the block and heads. Then there's the coolant and radiator reservoir. Ride a liquid cooled bike hard to soon and you get unnecessary wear and stress.