Davaar,
I have flown Tigers ,I think pulling back on the stick after an engine failure would only cause you to slow down rather than climb
If in your example lift still equalled weight you wouldn't be descending
Speed is constant in a descending glide because the weight vector always points toward the ground therefore giving you a 'forward' component to weight which balances drag.
Draw an aeroplane with a nose down attitude,draw in a weight vector pointing straight down,draw in a lift vector the same way you would if the a/c is S&L .There are also going to be vectors for vertical component of lift and drag but to keep it simple and if you don't understand vector addition simply think of the two vectors as pieces of string and 'pull' them .Which way does the aeroplane move?
I have flown a jet with the same configuration as the 145 (F28)and increasing /decreasing power just causes acceleration or deceleration,after a while of course the aircraft will climb/descend but more as a function of IAS variance and therefore lift variance than a 'pitch couple'.
MM.