Simviation Forums

I have opsky a340, and I cannot get it off the ground, it just runs off the runway, it will pitch, but no lift!! I have flaps extended 5% and I've even extended them further to see it that was it, but no joy! Also I noticed that when I choose a plane, not all but a lot of them are by default over their max. weight. Is there a way to correct this? And could someone give any advice on the issue I have taking off? I noticed this with almost all of my larger planes I deleted about 5 last night because NONE of them would take off. Thank in advance!

Did (do) you crank in elevator trim?  Almost all commercial jets require up trim in addition to flaps.  Check the read me files as they often specify the amount of trim required for takeoff.

Hope this helps.

Bob

You can change the fuel and passenger load when you load the plane...or.. any time, at the "Fuel and Payload" screen..


Edit:  Almost forgot to ask.. lol .. Have you mastered weight/balance, takeoff/landing, trim/flaps ... and all the other fundementals in nice, small, slow piston single ?  

I will try the trim method. Thank you for your help.

Oh yeah, should I use 5% flaps or more???

  I use 15% as a rule.  Bigger planes a little more.  I check the throttle section and see where the setting is on the flaps, generally a little bar protruding out.  When all else fails, read the instructions...It's a guy thing.

And check the aircraft weights in the aircraft.cfg file.

I had one that wouldnt take off and found it was overweight by 900,000 lbs.

I adjusted the weights to their proper values and have been flying it happily ever since.

I will try the trim method. Thank you for your help.

Oh yeah, should I use 5% flaps or more???

Buzz,

I think that if you have to ask that question, you need to maybe take a step back and try flying some single engine props a while and get the basics down before tackling the "aluminum cigars".

My guess is the aircraft is overloaded beyond the maximum takeoff weight and the current density altitude at the particular airport.

I've noticed that you have said Posky ...... ALL Posky aircraft are overweight...you need to remove fuel etc to get to max takeoff weight.

To find out if the aircraft is over weight all you have to do is select the aircraft then select FUEL AND WEIGHT it wil bring up a window and if overweight it will tell you in bold red letters. The best way to stop this from happening every time you start up FS you will need to change the AIRCRAFT.CFG file. If you do not change this file every time you start up FS this aircraft will revert back to being over weight. 8-)

"Buzz" -

As far as running off the runway, one thing I HATE about most aircraft is the nosewheel steering angle set in the aircraf.cfg file.

Most default and add-on aircraft have an angle of something like 45 to 60 degrees, which provides nice taxi handling for those who like that - but it SUCKS during the initial part of a takeoff unless you are lined up perfectly with the runway. Even then, NWS is often too sensitive / annoying until the rudder starts taking effect.

The NWS angle can be changed in the CONTACT POINTS section of the aircraft.cfg file - normally point "zero" parameter 7. I do this all the time.

Also, an excessive aft CG can lighten the nosewheel load, reduce tire contact friction, and therefore degrade steering control as well.

I will leave it to more astute people to give a good example of how to do this in the cfg file.  I type with my knuckles, and they are sore right now!

Its the fuel and payload i know from experiance with the posky '340.