have not been able to make planes since new update.

[max_42]

making planes was easy in 1.0.4 but the new update something has made it very difficult for me to make planes work.My shuttle falls out of the sky and tumbles after reentry. I downloaded FAR to try and fix it issue but it made little change. the stock planes and stock FAR planes fly, but poorly. All my planes will not lift off the runway, or if they manage to get airborn they [B]fly very very erratically.[/B]

i referenced this thread but found it unhelpful [URL]http://forum.kerbalspaceprogram.com/threads/52080-Basic-Aircraft-Design-Explained-Simply-With-Pictures[/URL]

[IMG][URL="http://postimg.org/image/8jiua8zcb/"][IMG]http://s1.postimg.org/8jiua8zcb/screenshot14.jpg[/IMG][/URL][/IMG]

I moved the center of thrust on my shuttle to let it try and take of from the runway. It will get into orbit well with the stand STS setup.


[IMG][URL="http://postimg.org/image/v4b9au475/"][IMG]http://s8.postimg.org/v4b9au475/screenshot26.jpg[/IMG][/URL][/IMG]

[B]Both of these planes will crash themselfs into the runway and explode. Notice the navball rolling already on the lower picture
[/B]
[IMG][URL="http://postimg.org/image/4pgeolpxt/"][IMG]http://s24.postimg.org/4pgeolpxt/screenshot28.jpg[/IMG][/URL][/IMG]

[B]In this plane the only way i could move my CoL even close to CoM was to move the wings waaay back
[/B]
[IMG][URL="http://postimg.org/image/53qq0p23v/"][IMG]http://s1.postimg.org/53qq0p23v/screenshot16.jpg[/IMG][/URL][/IMG]


what am I doing wrong?

thank you Edited November 23, 2015 by max_42

[Alshain]

The Blue Marker there, the Center of Lift, that needs to be behind the center of mass (the yellow marker). That fact hasn't changed since 1.0.4, or since ever. Something is broken in your game, because that first plane especially shouldn't be like that. There is no possible way the CoL should be that far forward. I would reinstall. Don't install any mods, and see if the problem is corrected. Edited November 22, 2015 by Alshain

[Hodo]

[quote name='max_42']making planes was easy in 1.0.4 but the new update something has made it very difficult for me to make planes work.My shuttle falls out of the sky and tumbles after reentry. I downloaded FAR to try and fix it issue but it made little change. the stock planes and stock FAR planes fly, but poorly. All my planes will not lift off the runway, or if they manage to get airborn they [B]fly very very erratically.[/B]


thank you[/QUOTE]


Most of your aircraft suffer from the same basic issue. Your CoL is to far forward.

The issue you are running into on the ground with take off is your landing gear are to far back.

Landing gear should be placed just behind your CoM, near your CoL, this is the "point of rotation" for the aircraft.
Like in this pic.
[img]http://i.imgur.com/XETBVqT.jpg[/img]

Notice how the aircrafts main landing gear are just behind the CoM, so it lets the aircraft rotate around them, like a pivot point. So you are not pushing them into the runway on take off.

Even on my older VTOL designs.
[imgur]TxoCK[/imgur]
The landing gear is just behind the CoM, that one was a tricky one though.

One of my must have mods now is RCS build aide... I cant suggest it enough if you are building with FAR. It is one of the mods I feel should be stock.

[bzimac]

I'm just guessing, but it might have something to do with a cargo bay.

You could try to open and close it in flight and see if it helps.

[max_42]

I am going to reinstall the game. My CoL only moves under drastic wing position changes. The landing gear issue makes sense as well thank you

[Pecan]

I only looked at the first picture - you start nose-down so the AoA on the wings is negative and they're pulling you onto the runway. Nice for racing cars, not nice if you're trying to lift off.

[FancyMouse]

I wonder how new update breaks this - if it's about CoL, then it should have the same problem in previous versions, I guess?

[max_42]

I saved my persistence file. deleted every thing related to KSP. Re-installed and its literally like a different game. everything works

[Malich]

Ah, I may have to do the same then. I've been struggling with CoL recently. it felt like the cockpit sections were the only things generating any lift!