http://www.reddit.com/r/SimplePlanes/wiki/index

Wing settings. You probably saw that you can adjust your wing from “symmetric”, “semi-symmetric” and “flat-bottom”. If you are wondering what the difference is, IRL this is it. Now how does it affect your plane? As all your wings in SP have the same angle of attack, if your wing have more camber, it will lift more. Meaning: “flat-bottom” lift more than “semi-symmetric” that lift more than “symmetric”. But hold on young designer! I already see you run and change all your designs to “flat bottom”, just don’t. Those options are here to allow you to balance your plane (assumption made here, post on the subreddit if you can prove that it brings more), it will require some testing to choose the right configuration for a leveled flight at nominal speed. Remember, to master this configuration imagine that you suspend your plane with wires attached to the wings, if you increase the camber, you’re pulling harder on the wire (see troubleshooting section).

2 things, first take the time to add a description, second use the settings of the wings to avoid the chronical pitch down

顶，很好的飞机。

This is a very cool looking little plane, you should create a profile so that we can see some more of your cool work