Au contraire
FFF, ALL engines should be warmed up before being asked to produce full power. Suddenly asking a motley collection of aluminium, brass, cast aluminium, cast steel, forged steel, spring steel etc etc with widely differing coefficients of expansion to work in the manner the designers intended is just asking for trouble. Ensuring the oil has reached a minimum temerature is a guide that at least most of the engine is at a relatively constant temperature. Also cold engines have a greater tendancy to cut when cold if the throttle is closed.
The reason that cars are driven away straight from starting the engine is more to do with fuel efficiency than conserving the engine. Even so, all manufacturers handbooks I've read recommend not exceeding a certain speed/rpm until the temperature gauge has made some kind of indication or if one is not fitted they specify a distance or time.
Who has control no offence mate but if you were renting an aeroplane off me and you were handling the engine as you describe we would be having words
Revving cold engines at least keeps the engineers in business........Good that you posted this though as it appears that nobody has explained the principle behind warming engines to you and probably a lot of other peeps out there. Hopefully this will increase your engine's life and therefore reduce your group's long term maintenance bills.
