Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
FSX Cessna aileron trim doesn't work
603 views
Skip to first unread message
Hominid
Nov 27, 2012, 1:05:53 AM11/27/12
to
Can't seem to find anything on the web about this - both 172's drift
to the left just slightly. I mean, that's okay if they do that in real
life; it would be nice if the trim worked! Elevator trim is fine; I
have it mapped to my joystick. But ailerons - nadda. Not even the
<ctl>-4 or <ctl>-6 works.
to the left just slightly. I mean, that's okay if they do that in real
life; it would be nice if the trim worked! Elevator trim is fine; I
have it mapped to my joystick. But ailerons - nadda. Not even the
<ctl>-4 or <ctl>-6 works.
Dallas
Nov 27, 2012, 3:09:48 AM11/27/12
to
Most often that is a result of the rudder axis not being centered. What
are you using for rudders?
--
Dallas
are you using for rudders?
--
Dallas
Randy L AT DOT
Nov 27, 2012, 6:15:39 AM11/27/12
to
Hi Hominid,
They do drift to the left in real life. This is the result of several
things. The torque of the engine, a spiraling slipstream hitting the
verticle stabilizer, and the gyroscopic effect of the propeller all
contribute to make the aircraft tend to drift to the left, expecially during
high RPM and low airpeeds.
I'm not sure why your aileron trim doesn't work, but you might try to
cancel out the drift by using rudder trim instead. I'm not sure that aileron
trim would cancel this drift out.
Randy L.
--
quo plus habent,
eo plus cupiunt
"Hominid" <ja...@jamesphotography.ca> wrote in message
news:9sl8b89ndvgabvgh9...@4ax.com...
They do drift to the left in real life. This is the result of several
things. The torque of the engine, a spiraling slipstream hitting the
verticle stabilizer, and the gyroscopic effect of the propeller all
contribute to make the aircraft tend to drift to the left, expecially during
high RPM and low airpeeds.
I'm not sure why your aileron trim doesn't work, but you might try to
cancel out the drift by using rudder trim instead. I'm not sure that aileron
trim would cancel this drift out.
Randy L.
--
quo plus habent,
eo plus cupiunt
"Hominid" <ja...@jamesphotography.ca> wrote in message
news:9sl8b89ndvgabvgh9...@4ax.com...
Hominid
Nov 27, 2012, 7:59:22 AM11/27/12
to
On Tue, 27 Nov 2012 02:09:48 -0600, Dallas
<Cybnorm@spam_me_not.hotmail.com> wrote:
>Most often that is a result of the rudder axis not being centered. What
>are you using for rudders?
My joystick. I tried setting a joystick button to center the rudder,
<Cybnorm@spam_me_not.hotmail.com> wrote:
>Most often that is a result of the rudder axis not being centered. What
>are you using for rudders?
but it made no difference when trying to trip my right aileron.
Hm...
Hominid
Nov 27, 2012, 8:03:21 AM11/27/12
to
Hey Randy,
What I'm experiencing is perhaps not so much a drip to the right due
to yaw, but the plane will eventually, and just slightly bank to the
left, so about every 30 to 60 seconds, I must yank the joystick to the
right to correct it. I get the physical reasons for it doing so in
real life; I just can't get aileron trim to work in the 172, whereas I
can in every other plane that I fly.
Perhaps I need to compare configuration files...
What I'm experiencing is perhaps not so much a drip to the right due
to yaw, but the plane will eventually, and just slightly bank to the
left, so about every 30 to 60 seconds, I must yank the joystick to the
right to correct it. I get the physical reasons for it doing so in
real life; I just can't get aileron trim to work in the 172, whereas I
can in every other plane that I fly.
Perhaps I need to compare configuration files...
Nick O'Tyme at
Nov 27, 2012, 8:10:37 AM11/27/12
to
"Hominid" <ja...@jamesphotography.ca> wrote in message
news:l9e9b8tdc8rtbml4v...@4ax.com...
> Hey Randy,
>
> What I'm experiencing is perhaps not so much a drip to the right due
> to yaw, but the plane will eventually, and just slightly bank to the
> left, so about every 30 to 60 seconds, I must yank the joystick to the
> right to correct it. I get the physical reasons for it doing so in
> real life; I just can't get aileron trim to work in the 172, whereas I
> can in every other plane that I fly.
>
> Perhaps I need to compare configuration files...
>
You might try checking the rudder trim. If your rudder is steering slightly
>
> What I'm experiencing is perhaps not so much a drip to the right due
> to yaw, but the plane will eventually, and just slightly bank to the
> left, so about every 30 to 60 seconds, I must yank the joystick to the
> right to correct it. I get the physical reasons for it doing so in
> real life; I just can't get aileron trim to work in the 172, whereas I
> can in every other plane that I fly.
>
> Perhaps I need to compare configuration files...
>
left, it can cause the a/c to bank left.
The right wing travels slightly faster than the left and generates more
lift. Hence the bank.
Danny
Nov 27, 2012, 9:32:54 AM11/27/12
to
James, you can go into the Buttons and keys settings and set a keyboard
button, such as Num 5, on the number keypad of your keyboard to Center
Rudder trim. It might already be set, I don't remember the defaults, since
I change many of the defaults to suit me.
You mention CTRL+4, etc. The Aileron trim button is CTRL+ Num4 and
CTRL+Num6. Make sure you were not pressing CTRL+4, there is a difference.
Looking at my control settings for the Control Surfaces, CTRL+Num0 and
CTRL+NumEnter is set for Rudder trim. There is not Rudder Center setting in
my settings so maybe it is not a default setting. You likely can set it to
a joystick button as well.
"Hominid" wrote in message
news:9sl8b89ndvgabvgh9...@4ax.com...
button, such as Num 5, on the number keypad of your keyboard to Center
Rudder trim. It might already be set, I don't remember the defaults, since
I change many of the defaults to suit me.
You mention CTRL+4, etc. The Aileron trim button is CTRL+ Num4 and
CTRL+Num6. Make sure you were not pressing CTRL+4, there is a difference.
Looking at my control settings for the Control Surfaces, CTRL+Num0 and
CTRL+NumEnter is set for Rudder trim. There is not Rudder Center setting in
my settings so maybe it is not a default setting. You likely can set it to
a joystick button as well.
"Hominid" wrote in message
news:9sl8b89ndvgabvgh9...@4ax.com...
sambodidley
Nov 27, 2012, 11:56:24 AM11/27/12
to
"Hominid" <ja...@jamesphotography.ca> wrote in message
news:9sl8b89ndvgabvgh9...@4ax.com...
I do just what I do when I am flying a real one. I hold pressure on the
right rudder with my right foot until I finish my climb and throttle back to
cruise. Mine doesn't drift there. If yours still drifts a little at cruise a
small amount of right rudder trim should correct it.
Sam
sambodidley
Nov 27, 2012, 1:07:16 PM11/27/12
to
news:l9e9b8tdc8rtbml4v...@4ax.com...
way you want it to fly just hack a cfg file until it does. It might not
still be simulating a real plane but, boy howdy, that sucker really flies
gud now.<g>
Sam
.
> Hey Randy,
>
> What I'm experiencing is perhaps not so much a drip to the right due
> to yaw, but the plane will eventually, and just slightly bank to the
> left, so about every 30 to 60 seconds, I must yank the joystick to the
> right to correct it. I get the physical reasons for it doing so in
> real life; I just can't get aileron trim to work in the 172, whereas I
> can in every other plane that I fly.
>
> Perhaps I need to compare configuration files...
Yep, that's the standard simmer solution. If a sim plane doesn't fly the
>
> What I'm experiencing is perhaps not so much a drip to the right due
> to yaw, but the plane will eventually, and just slightly bank to the
> left, so about every 30 to 60 seconds, I must yank the joystick to the
> right to correct it. I get the physical reasons for it doing so in
> real life; I just can't get aileron trim to work in the 172, whereas I
> can in every other plane that I fly.
>
> Perhaps I need to compare configuration files...
way you want it to fly just hack a cfg file until it does. It might not
still be simulating a real plane but, boy howdy, that sucker really flies
gud now.<g>
Sam
.
Hominid
Nov 27, 2012, 2:38:36 PM11/27/12
to
Well, interesting that there's no aileron trim on the 172, yet the cfg
file has an entry for it. It's moot if it doesn't work I suppose.
(There is for the Barron twin, and it works like a charm.)
Trying some rudder trim per Sam's suggestion just made me fly in
circles in the oppose direction - though very large ones. So, I
tweaked THAT setting in the cfg file from 1.0 to 0.1 to reduce the
sensitivity, which gives me very fine control, and exactly what I need
to stay in a straight line!
file has an entry for it. It's moot if it doesn't work I suppose.
(There is for the Barron twin, and it works like a charm.)
Trying some rudder trim per Sam's suggestion just made me fly in
circles in the oppose direction - though very large ones. So, I
tweaked THAT setting in the cfg file from 1.0 to 0.1 to reduce the
sensitivity, which gives me very fine control, and exactly what I need
to stay in a straight line!
sambodidley
Nov 27, 2012, 3:26:00 PM11/27/12
to
news:u94ab8p6rpp0eqt3e...@4ax.com...
the first place, lose the joystick. The C172 doesn't have one. Get yourself
a good yoke and learn to use it. If you intend to take lessons later in a
real plane like you said then the real C172 and all of its flight
characteristics is probably be what you will start in. You probably won't
fly a single plane in your entire training period that uses a joystick. You
will also learn that nearly all prop planes will pull to the left at high
RPM because of the torque. You learn to compensate for that as you learn
to fly. You don't have any cfg file to hack.
But, on the other hand, if your only interest is in simming on a
computer then do whatever it takes to make you happy.<g>
Sam
> Well, interesting that there's no aileron trim on the 172, yet the cfg
> file has an entry for it. It's moot if it doesn't work I suppose.
> (There is for the Barron twin, and it works like a charm.)
>
> Trying some rudder trim per Sam's suggestion just made me fly in
> circles in the oppose direction - though very large ones. So, I
> tweaked THAT setting in the cfg file from 1.0 to 0.1 to reduce the
> sensitivity, which gives me very fine control, and exactly what I need
> to stay in a straight line!
Yep, but mow you are not flying a C172. You are flying a fiction. In
> file has an entry for it. It's moot if it doesn't work I suppose.
> (There is for the Barron twin, and it works like a charm.)
>
> Trying some rudder trim per Sam's suggestion just made me fly in
> circles in the oppose direction - though very large ones. So, I
> tweaked THAT setting in the cfg file from 1.0 to 0.1 to reduce the
> sensitivity, which gives me very fine control, and exactly what I need
> to stay in a straight line!
the first place, lose the joystick. The C172 doesn't have one. Get yourself
a good yoke and learn to use it. If you intend to take lessons later in a
real plane like you said then the real C172 and all of its flight
characteristics is probably be what you will start in. You probably won't
fly a single plane in your entire training period that uses a joystick. You
will also learn that nearly all prop planes will pull to the left at high
RPM because of the torque. You learn to compensate for that as you learn
to fly. You don't have any cfg file to hack.
But, on the other hand, if your only interest is in simming on a
computer then do whatever it takes to make you happy.<g>
Sam
Danny
Nov 27, 2012, 4:47:50 PM11/27/12
to
So what says the config file, that comes with the default plane, is exactly
right and should not be toyed with? I have never see anything in my 25+
years of simming, that said that Microsoft got every plane's aircraft.cfg
file correct. Heck, they are ALL fictional planes. Using numbers to set
variables and parameters of flight characteristics that, some how, might
come close to a 'real' plane's handling, has got to be hit and miss at best.
But to advise someone they will not longer be flying a real plane but a
fictional plane if they change a config file....
"sambodidley" wrote in message news:k938ag$not$1...@dont-email.me...
right and should not be toyed with? I have never see anything in my 25+
years of simming, that said that Microsoft got every plane's aircraft.cfg
file correct. Heck, they are ALL fictional planes. Using numbers to set
variables and parameters of flight characteristics that, some how, might
come close to a 'real' plane's handling, has got to be hit and miss at best.
But to advise someone they will not longer be flying a real plane but a
fictional plane if they change a config file....
"sambodidley" wrote in message news:k938ag$not$1...@dont-email.me...
sambodidley
Nov 27, 2012, 6:25:07 PM11/27/12
to
"Danny" <drmckee@yahoo.c o m> wrote in message
news:EcqdnefwV5CXqCjN...@giganews.com...
> So what says the config file, that comes with the default plane, is
> exactly right and should not be toyed with? I have never see anything
> in my 25+ years of simming, that said that Microsoft got every plane's
> aircraft.cfg file correct. Heck, they are ALL fictional planes. Using
> numbers to set variables and parameters of flight characteristics that,
> some how, might come close to a 'real' plane's handling, has got to be hit
> and miss at best.
> But to advise someone they will not longer be flying a real plane but a
> fictional plane if they change a config file....
Danny,
> exactly right and should not be toyed with? I have never see anything
> in my 25+ years of simming, that said that Microsoft got every plane's
> aircraft.cfg file correct. Heck, they are ALL fictional planes. Using
> numbers to set variables and parameters of flight characteristics that,
> some how, might come close to a 'real' plane's handling, has got to be hit
> and miss at best.
> But to advise someone they will not longer be flying a real plane but a
> fictional plane if they change a config file....
I was responding Hominid's post. I wasn't advising you to do anything.
The last line of my post was the only one that might concern you any any
way. He has posted a thread on this group expressing an intent to take
flying lessons to get a pilots license. All of my post was directed to
Hominid concerning that intent. I was offering some suggestions that I
thought might benefit him in that endeavor. I have no concern what so ever
with what one does to his "sim" plane to make it fly to his liking. Neither
do I care what he uses to control them when he is doing it. My suggestions
were directed "only" to someone who had expressed an interest in flying REAL
planes. Whether he chooses to use those suggestions is entirely up to him.
As I said in my post, for anyone else, do whatever it takes to make you
happy. That's what I do, and it works real good for me.<g>
Sam
Dallas
Nov 27, 2012, 6:42:13 PM11/27/12
to
Hominid wrote:
> My joystick. I tried setting a joystick button to center the rudder,
> but it made no difference when trying to trip my right aileron.
Pressing center would center what the program thinks is center. If
> My joystick. I tried setting a joystick button to center the rudder,
> but it made no difference when trying to trip my right aileron.
calibration off to the right, that's what you'd get as center.
I'd be shocked if the rudder calibration isn't the problem... (since I
just went through the same process and I had to work to get the rudder
centered.)
(Two other causes include more fuel in the left tank and/or in the
weight and balance section of the aircraft - a heavy passenger on one
side. This effect was exaggerated in FS9, not sure about FSX.)
Here's why I'm sure it's not a config file problem = everyone would
have that complaint for the C172 and we don't.
A couple of suggestions, first undo the config file changes they might
make the airplane unrealistic and I assume you want to use it for
training.
Then download this precise control mapper and run it to check your
joystick rudder for center.
http://www.leobodnar.com/products/BU0836/DIView.zip
Work to get the rudder calibrated to center using this control mapper
as the test.
If you still have the problem after this, then make your control null
zone larger to see if that cures the problem. - (which would confirm a
rudder deflection)
Then finally, do what Sam says... get a realistic yoke and rudder
pedals - They are basically the cost of 2 lessons and they will pay for
themselves with the many lessons you don't have to take because you've
been practicing at home.
BTW - are you planning on taking lessons in the C172?
--
Dallas
sambodidley
Nov 27, 2012, 8:55:28 PM11/27/12
to
"Dallas" <Cybnorm@spam_me_not.Hotmail.Com> wrote
> BTW - are you planning on taking lessons in the C172?
>
> --
> Dallas
basic trainer for most flight schools around here. If Hominid is going to
use the sim plane for practice he should do it as realistic as possible.
That way he won't have to unlearn any bad habits. BTW, that last C172 I
flew did pull to the left at high RPM. So has every other single engine
prop plan I ever flew. So does the FSX defaultC172 on my computer.
Especially so on take off and Vx throttle. I just correct for it with my
controls until I throttle back to cruise. Anything else wouldn't be
realistic.<g>
Sam
Hominid
Nov 28, 2012, 7:49:56 AM11/28/12
to
Hey Dallas, Sam, Danny, Randy... (did I miss anyone?)
I don't know off-hand what they have for trainers; I won't know till
they respond to the inquiry I sent. I'll give the suggestion below a
try and let you know.
I guess after all is said and done, if in real life the 172 does not
have aileron trim, then I want to emulate that. But just so you all
know, it pulls to the left *after* climbing, and I'm just cruising at
a steady rate (105 knots) with no wind. I found that in the Barron,
just a touch of aileron trim fixed that, so I just assumed all planes
had that feature.
And yes Sam - I'm going to get a yoke and pedals so I can un-learn my
joystick muscle-memory. (Anyone got some for sale?) I'm open to
suggestions re: brand, and there's a few ducks I need to get in a row
before taking real lessons; it'll be a while before I actually start.
The thing is I've commited to doing it, and it's a big deal for me, so
eventually getting yoke & pedals is a no-brainer.
0 new messages