CaptainProp
We are now "de-rating" our take-offs to the extent that T/O thrust may actually be LOWER than CLB thrust
Interesting comment , the Airbus 320 FCOM statement on this is below:
Thrust must not be reduced by more than 25 % of the full rated takeoff thrust.
The flexible takeoff EPR cannot be lower than the Max Climb EPR at the same flight conditions.
The FADEC takes the above two constraints into account to determine flexible EPR.
The above two constraints also limit the
maximum flexible temperature at ISA + 55
(70°C at Sea Level).
The flexible takeoff thrust cannot be lower than the Max Continuous thrust used for the final takeoff flight path computation (at ISA + 40).
The flexible temperature cannot be lower than the flat rating temperature, TREF*, or the actual temperature (OAT).
I have been using "flex thrust" or "standard derate" for about 30 years now. All of the types I have flown have had a similar policy statement to the one above and have employed some method of ensuring that the takeoff was carried out with not less than climb thrust. If you think it through, there really is no advantage to taking off with a lower thrust setting than that with which you intend to climb.
What type do you operate and what does the equivalent paragraph in your manual say?
YS