V2
Seem to recall a DC10 that (literally) lost an engine. The crew reacted (as they had been taught) by pitching up to reduce to V2. Enfortunately they had also lost some slats and were unable to maintain control. It is suggested that had they maintained the speed at separation they would have maintained control. So I taught maintain the current speed UNLESS there is a chance of ground contact. It's all to do with energy conservation.