Flyable aircraft pitch adjustement

Hi,

 

Have just obtained some B744 aircraft (CF6, RB211,JT9D). A great fleet, but have difficulty achieving realistic pitch at the climb, level flight and landing. Some aircraft fly non realistically pitched up (nose up) when in level flight, some land non realistically pitched down (nose down) when landing. I am familiar with adjusting these characteristics in aircraft.cfg [Flight_tuning] and [flaps] by playing with the lift and pitch scalars, but it seems to be an endless work changing the figures and then flying the aircraft, seeing if the pitch is OK. Sometimes, changing the scalars to achieve the level flight caused the aircraft to land with the nose too much down. The perfect adjustment for landing with the nose slightly up causes the level flight too much pitched up. Quite a struggle, which made me to post this.

 

Is there any rule on how to calculate the right scalars to make the flight realistic?

 

Any advise greatly appreciated.

 

Thanks

Peter

Pitch is a function of weight, altitude and airspeed. If you have all this right, you've got to test, test and test.

 

Now, if you have some engineering/physics background, there is a value inside the airfile, something like CL vs AoA, that may help you with the tinkering if you understand it. For the current condition, find the current CL and then divide it between the CL for the desired AoA. This may give you the scalar you want.

 

If you have some spare $60, you may like to purchase the iFly 744 for FS9 and stop suffering... or a little less and get the boxed PMDG 744 at Aerosoft. It's money, but well, how much is your time worth?

Bear in mind, also, that many, if not most, commercial airliners are designed to fly at various nose-high attitudes.

Generally, if it's a few degrees nose-high, in level flight at cruise altitude and airspeed, it's probably correct.

 

Obviously, same with climb. The plane will be nose-higher than cruise. Generally, for descent and landing, pitch stays set, and sink is controlled with power.

 

Of course, all this depends on the distribution of fuel, cargo, and passengers. You have to calculate the right positions of passengers and cargo, and the correct fuel tanks used and how much per, to keep the CG within tolerable limits.

 

Don't go crazy trying to level them up in cruise, or whatever. Check the plane's Operating Instructions for the correct pitch in the various phases of flight before you go adjusting things TOO much.

 

Have fun!

Pat☺

Thanks gents. Bit of a struggle but got them flying ok now by playing with the scalars in cfg. Yes the level flight is bit pitched up. But mainly the landings are now on the main gears without scraping the tail or hitting nose first. Thanks again Cheers Peter