Need help with planes.

[gullum1208]

UPDATE:

Thank you all for the tips. i had made my own really jank plane that was very hard to control, but your tips allowed me to problem solve and make a very easily controllable plane. Special thanks to bewing for his detailed and very helpful answer. Allowed me to really fix what was really wrong with the plane.

New Plane                                                                                                                                                                                                                                      

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I am new to KSP and have been trying to make a plane to do the many quests that ask for a specific area. I've tried looking around to find out how to make a plane, but mine simply does not work. I only have the first plane branch researched, so i only have the basic pieces. This plane makes it of the runway (I take it all the way down because the tail hits the runway if i pull up earlier) and then it climbs to about 200-300 meters before it just starts falling. I've tried adding more engines or removing some of the fuel, to no avail. 

Can someone please explain to me what I'm doing wrong, or if this is even a good idea? I have pictures of my plane below. i appreciate any help I get can get.

 

Edited December 31, 2016 by gullum1208
update and thank you(s)

[Vanamonde]

For one thing, try shifting the mass farther forward or the lift farther back, or both. With the center of mass that far ahead of the center of lift, the nose will try to point down. 

Welcome to the forum, by the way.

[Wanderfound]

Designed for FAR, but something similar should work in stock aero.

Just tweak the wing position so that CoL is just behind CoM.

 

[bewing]

OK, several little things wrong with your plane -- but your basic design is OK. I understand that this is your first one, so you are throwing the kitchen sink at it -- and then I assume that you intend to have the fun of doing engineering refinements on it once it flies a little.

So, first -- your front engines appear to be directly in front of your rear engines. KSP does model this problem in most cases, and cancels the thrust of any engine that has something directly behind it. So your front engines are probably doing nothing at all except using fuel.

Second, the jet engines are really very efficient. You won't want to fly more than maybe 1000 km roundtrips with your first plane, so you've got waaaaay too much fuel. And the fuel is heavy, and probably makes your plane hard to fly. So yeah, you are going to want to remove almost all the fuel in your center fuselage.

So my basic suggestion is: dump the front engines. Take the rear pair of engines and move them backwards to where your rear stabilizers are now. Attach the rear stabilizers to the outside of your engine nacelles. As said above, you want the CoM a lot closer to your CoL, and doing what I'm suggesting will probably accomplish that. After that, I bet your plane flies.

 

 

[KevinW42]

You should also set those wing-mounted elevons to roll only. You get some weird effects when a wing segment is attached ahead of the CoM but the control surfaces attached to it are behind. And you also probably only need one pair (unless you're using one of them as flaps).

[zolotiyeruki]

Good suggestions so far.  I'd also suggest that after you remove most of the fuel weight, remove two engines, and drop one of the pairs of elevons, you also go for a traditional landing gear setup--put the pair of wheels just behind your center of mass, and put your nose gear as far forward as you can.  That will make it easier to rotate and take off.

[klesh]

You can try flipping the Tail Connector B so it gives you more clearance on takeoffs and landings.  Roll it, such that the straight edge is aligned on the dorsal portion of the plane (top spine) rather than the ventral (belly).  

The rest of the comments are good.  

 

One last fuel question.  Are the two fuselage pieces you're using behind the cockpit Mk1 Liquid Fuel Fuselage parts, or Structural Fuselage parts?   

If you have access to the latter, use them... you dont need a huge amount of fuel with jets and the smaller Mk0 tanks on the engines will be fine.  If you only have access to the former, drain them both and only carry fuel in the smaller engine sized tanks.  You're potentially carrying lots and lots of heavy extra fuel.

Edited December 31, 2016 by klesh

[Unknown account x1]

i ja isto imam probleme sa avionima

[Vanamonde]

4 hours ago, Unknown account x1 said:

and I also have problems with planes

Please post in English, outside of the international threads.