Alright mutt, I think that might have been his point which I obvoiusly missunderstood but thanks for pointing it out to me with an exclamation mark.
The reason for this whole thing is the JAR-OPS requirments for what shall be included in the performance chapter of an OM-B.
JAR-OPS1 Subpart P
4.2 Additional Performance Data. Additional
performance data where applicable including:
(a) All engine climb gradients;
(b) Drift-down data;
(c) Effect of de-icing/anti-icing fluids;
(d) Flight with landing gear down;
(e) For aeroplanes with 3 or more engines, one engine inoperative ferry flights; and
I know that it says "where applicable" but yeah, I would like to know.
Now we all have our feelings regarding JAR-OPS and its "benefits" but a rule is a rule is a rule....