OK, community, here's a little feedback regarding trim on an aircraft. Trim on an aircraft allows the pilot to hold the nose of an aircraft in a certain position without having to deflect the controls and thus alleviates any fatigue induced from holding the controls in that position. Trim is present on pretty much every aircraft that varies its speed between takeoff and landing and is usually actuated by a thumb switch on the control wheel or column. Trim is generally set on the ground in a certain position to allow for a safe takeoff. The specific setting accounts for takeoff speed, CoG and aircraft weight, among other things and allows for a safe at-speed liftoff. The pilot adjust trim in the nose down direction after takeoff as airspeed increases. As the plane slows for landing, the pilot adjusts nose up trim to allow the aircraft to slow in a controlled manner without unnecessarily losing altitude. Let's look at a few examples. First of all here's a basic electric trim switch on a jetliner (in this case, the 737): . As you can see, forward is nose down and back is nose up (there's also a trim wheel that turns in response to the trim switch and can be manually turned to adjust trim). Next, here's a trim switch on a T-38, the Air Force's supersonic advanced trainer jet, flown by a number of nations: . Note what looks like a hat switch at the top of the control stick...that's the trim switch. Again, push forward on that switch trims the nose down, pulling back on the switch trims the nose up. Last, consider the lowly Cessna 152, a plane that hundreds of thousands, if not millions, have trained in: Note that turning the wheel forward (or up) trims nose down, while turning the wheel back (or down) trims the nose down OK, what's the common thread here? Nose UP trim is actuated by moving the trim switch DOWN and nose DOWN trim is actuated by moving the trim switch UP. It’s intuitive...if you stop to think of it...pushing forward on the stick or yoke makes the nose go down and pulling back makes the nose come up.