Aces High Bulletin Board
General Forums => The O' Club => Topic started by: B17Skull12 on November 12, 2004, 11:49:27 PM
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Ok today i went flying with my dads friend and my friend Larry. If you watched that old show on the history channel where the guy talked about warefare and he did the one on air combat. He flew at Air Combat Usa against a guy called smudge. "Smudge" is my friend Larry. So Today i threw in 2 new parts i didn't use before. Trim and Rudder. Rudder, since i got pedals was second nature. The Feedback is a bit more than i expected. The Trim wasn't being nice to me i guess. It Didn't respond were well i thought. But then i flying in a old 175(?) RG. My question, what is the trim suposed to? Relieve pressured need to move yoke or act as like elevators.
Thanks.
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Neutralize the stick force.
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"Trim" off control pressures. Ideally, you can let go of the yoke and fly the plane with rudder.
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Lizking and Jigsaw got it for you. A caveat, do not confuse a games flight considrations with real lilfe. They are not the same.
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Trim is used to allow an aircraft to fly at a desired attitude and airspeed without constant control inputs from the pilot.
Most simple single-engine aircraft are equipped only for "Pitch" (or elevator) trim. More advanced aircraft have trims for "Roll" (Ailerons) and "Yaw" (Rudder).
Using Pitch trim, you can configure the aircraft to Climb, Fly Level, or Descend.
A trim setting is only good for a specific "Thrust" (power or throttle) setting. Changing the Thrust setting will result in a different flying Attitude.
For example, upon takeoff I set the power at 25" Manifold Pressure (MAP) & 2500 (Propellor) Rpm at an Indicated Airspeed (IA) of 80 Knots . I trim for a 1000 Ft/Min climb and fly "hands-off" to my cruising Altitude of 5000 Ft.
Upon reaching my desired Alt, I use the Pitch trim (elevator down) to hold the nose down and maintain a level attitude. As the aircraft accelerates I have to periodically re-trim or the aircraft will try to climb rather than increase speed. Without changing the power setting the aircraft will accelerate to it's cruising speed of 150 kts.
After reaching my desired cruise speed, I reduce the MAP to 22" and the Prop to 2200 RPM to save fuel. A last re-trim of the pitch (probably nose-up) and I cruise to my destination at 150 kts.
As I near my destination I decide to descend, so I reduce my power to 20" MAP. With less power available, the aircraft seeks equilibrium and begins to descend and slow so I re-trim nose-down to indicate 150 kts and a 500 FPM descent.
The thing to remember about using trim and about flying in general, is that all the controls act together to acheive the desired result, and that changing any one control setting (Thrust, Roll, Yaw, or Pitch) will affect one or more of the others, and will require some input by the pilot to maintain the desired Attitude or Airspeed.
CptA
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Ok got it. Was confusing me. Flying over the Rose Bowl climbing to 3000, the trim was responding to well. It would keep striaght for a min then the planes nose would go up or down and i just couldn't seem to get it right. I noticed that it also took less pressure to move the controls on the plane as you got the trim closer to center. Ok thanks that was all. I need ot wait 6 more months before considering pilots liscense. Only 15 1/2:(.
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Well, if you want to get some "trim" on a plane, you'll need a pilot's licence, a plane with an autopilot and naturally, an adventurous girlfriend.
Good luck.
My regards,
Widewing
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Originally posted by Widewing
Well, if you want to get some "trim" on a plane, you'll need a pilot's licence, a plane with an autopilot and naturally, an adventurous girlfriend.
Good luck.
My regards,
Widewing
That just begs to be followed up by...
this (http://www.ntsb.gov/ntsb/brief.asp?ev_id=20001212X18632&key=1)
Skull, get your ground school out of the way.