On take off from CDG, the take off roll was normal and so was rotation. After no less then a minute from leaving the tarmac the captain throttled back the engines and the angle of climb reduced. We then seemed to quietly climp into the air.
Normal climb profile for almost any modern airliner (in fact I'm just hedging by saying that; I personally know of no airliner flying today where this is not
Takeoff thrust and climb thrust are two different things. Takeoff thrust is intended to speed up the plane as quickly as possible given the confines of the runway, in order for the plane to get off the ground within a reasonable safety margin. Takeoff thrust, however (even in de-rated takeoffs), is not at all efficient - it eats up fuel and is more power than you need anyway for a comfortable climb. (At a normal rate of climb, you'd overspeed pretty quickly using takeoff thrust.)
A lot of things can affect exactly what the optimal takeoff and climb thrust settings are. On some days and on some runways, the difference may be small enough that you might not notice the reduction to climb thrust. Most of the time, though, you'd notice it. You may not have noticed it on previous flights because of where you were sitting, or if you normally fly on airplanes with quieter engines, or whatever. (You'd still usually feel it, though; it usually feels like you're in a car where the driver suddenly hits the brakes.)
Does anybody know of any restrictions with regard to older aircarft equiped with noisy engines using Fench airports....?
If this was a noise abatement takeoff, exactly the opposite would likely have occured.
In a noise abatement takeoff, a series of procedures are used both to avoid residential areas and to climb as quickly as possible (the higher the airplane is, the less noise you hear on the ground). So an airplane will stay at takeoff thrust longer, and the reduction to climb thrust will be less dramatic. Some airplanes are capable of climbing more quickly than others, though, and some engines are rated for running at high pressure ratios longer than others, so not every noise abatement takeoff is going to feel the same. Yours definitely sounds like the opposite of what you'd want to do in a noise abatement takeoff, though.
Obviously, airlines hate noise abatement takeoffs and avoid them whenever possible. They waste fuel and are also harder on the engines.
Noise abatement takeoffs are common in many areas. But this sure doesn't sound like one. Just sounds like a normal takeoff, where the reduction to climb thrust was more noticeable than usual in an airplane with louder engines than most.
btw, with climb thrust you're not actually climbing any slower than you are at takeoff using takeoff thrust, because your airplane is going a lot faster than it was at takeoff.
I'm tired of being a wanna-be league bowler. I wanna be a league bowler!