[rebel-builders] trim control vs airspeed.
Posted: Sun Feb 19, 2012 8:55 pm
What I am saying is the stick pressures with different throttle settings are
not sufficient to require changes in trim setting. In some airplanes that I
have flown, I have to trim differently for climb (full throttle) and
landing, as the stick (yoke) pressures are excessive if I do not.
I am not saying that there is no pressure, and I do know some that will trim
even a Rebel. But it is very slight in comparison to some other planes, and
not worth fiddling with for me. In fact, I never even notice it.
If I pull power back, I think I do push the nose down slightly to descend.
But since I actually have to think about it to tell you, just goes to show
how insignificant that pressure is. I can honestly tell you that I have not
adjusted my trim in flight for many months. That includes different
loadings, sometimes with a big baggage load.
And I have very little friction in my elevator control system. On the
ground, the elevator will fall to the stick forward position if unattended.
Walter
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
tjhickey@iowatelecom.net
Sent: Wednesday, August 31, 2011 2:28 PM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] trim control vs airspeed.
Walter:
This confuses me.
You say that you do not have to change trim settings when you change
throttle settings.
Can you tell me what happens when you pull the power back from cruse? Does
the aircraft begin a descent and hold to the prior level cruse airspeed?
Or does it require you to push the nose over after you close the throttle?
Tim Hickey
-----Original Message-----
From: WALTER KLATT
Sent: Saturday, August 27, 2011 11:26 AM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Re: [rebel-builders] And the saga
continues...Rebel #56 Build
If yours is not stable in pitch, you may need to adjust your elevator trim
slightly. With mine it is completely hands free, unless fuel/pax really
unbalanced, or non cruise flap setting. Can even fly feet off the rudder,
with the right power setting. My flap setting though, does change the roll
stability, I assume because of the prop wash, with full flaperons instead of
separate ailerons on the Rebel.
I actually like the near neutral stability in roll and pitch. I can take my
hands off the stick, to get a map, or sunglasses, and it will stay in
whatever attitude I had it. Also nice in steeper turns with little stick
pressure.
The only time I really have to pay attention to stability and rudder use, is
when I haul the canoe with Wayne's canoe loader. I am getting used to that
now, but it can be a little unnerving in turbulence.
I also really like not having to adjust my elevator trim every time I change
flap or throttle setting like in some airplanes.
I guess all airplanes are a little different, and there are compromises, but
sometimes it is just preference or what you are used to.
Walter
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not sufficient to require changes in trim setting. In some airplanes that I
have flown, I have to trim differently for climb (full throttle) and
landing, as the stick (yoke) pressures are excessive if I do not.
I am not saying that there is no pressure, and I do know some that will trim
even a Rebel. But it is very slight in comparison to some other planes, and
not worth fiddling with for me. In fact, I never even notice it.
If I pull power back, I think I do push the nose down slightly to descend.
But since I actually have to think about it to tell you, just goes to show
how insignificant that pressure is. I can honestly tell you that I have not
adjusted my trim in flight for many months. That includes different
loadings, sometimes with a big baggage load.
And I have very little friction in my elevator control system. On the
ground, the elevator will fall to the stick forward position if unattended.
Walter
-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
tjhickey@iowatelecom.net
Sent: Wednesday, August 31, 2011 2:28 PM
To: rebel-builders@dcsol.com
Subject: [rebel-builders] trim control vs airspeed.
Walter:
This confuses me.
You say that you do not have to change trim settings when you change
throttle settings.
Can you tell me what happens when you pull the power back from cruse? Does
the aircraft begin a descent and hold to the prior level cruse airspeed?
Or does it require you to push the nose over after you close the throttle?
Tim Hickey
-----Original Message-----
From: WALTER KLATT
Sent: Saturday, August 27, 2011 11:26 AM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] Re: [rebel-builders] And the saga
continues...Rebel #56 Build
If yours is not stable in pitch, you may need to adjust your elevator trim
slightly. With mine it is completely hands free, unless fuel/pax really
unbalanced, or non cruise flap setting. Can even fly feet off the rudder,
with the right power setting. My flap setting though, does change the roll
stability, I assume because of the prop wash, with full flaperons instead of
separate ailerons on the Rebel.
I actually like the near neutral stability in roll and pitch. I can take my
hands off the stick, to get a map, or sunglasses, and it will stay in
whatever attitude I had it. Also nice in steeper turns with little stick
pressure.
The only time I really have to pay attention to stability and rudder use, is
when I haul the canoe with Wayne's canoe loader. I am getting used to that
now, but it can be a little unnerving in turbulence.
I also really like not having to adjust my elevator trim every time I change
flap or throttle setting like in some airplanes.
I guess all airplanes are a little different, and there are compromises, but
sometimes it is just preference or what you are used to.
Walter
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