Thanks Barit1 and John Tullamarine, cleared it up a bit alright. So when I select a derate temp and use the associated speeds, if I have an engine failure then technically I shouldn't increase the thrust. Once I'm above Vmu and airborne is there a problem with Vma with increasing thrust?
JT, I agree with your last point it doesn't make sense to increase the thrust "for wife & kids" when the current thrust is enough to climb you safely away, especially if you're having difficulty controlling the aircraft at the time....bad situation worse imho.
Anway thanks for the replies.
