I set up a flight from LYBE to LIRF. Cruise level is at 30000ft. There is a lot of turbulenceup to FL250.
I programmed the FMC for straight climb to 30000ft. What I notice is that around 25000ft. the air speed drops to under 200KIAS. I suspect that it would eventually stall and not be able to reach the desired flight level. If I have an intermediate altitude at 22000 where I let the bird build up some speed then the climb to 30000 ft is not a problem.
My question to people with the relevant experience is this:
Is this behaviour normal ? Was the 737 just too heavy to continue climbing at such altitudes at such low speeds ?
Enclosed is the flight plan and the flight. I used it to have generic ATC and imported it into the FMC. Also enclosed is my aircraft.cfg file. For those that have Lago's Scenery Enhancer you can find the files for LYBE and LIRF. You will be cleared for takeoff from RWY30 at LYBE.