Today's Message Index:
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1. 11:37 AM - Re: Gearleg fairings? (Im7shannon@aol.com)
2. 02:11 PM - Re: Gearleg fairings? (Jim Stone)
3. 03:33 PM - Re: Gearleg fairings? (nico css)
Message 1
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| Subject: | Re: Gearleg fairings? |
If it is not making it slower, it would be easier to install a trim tab on
the rudder than make new intersect fairings.
I guess I am just saying that because I am painting mine right now and I
don't want to do any of this over after weeks of sanding!
Kevin Shannon
HR II
Hey Fellas
I've been flying my Harmon Rocket for a grand total of 5 hours now
and all was going well until I put on the gearleg fairings and wheelpants.
When I first flew it without the fibreglass bits she would pull to the left
ever so slightly at full throttle and require very light right rudder to
keep the ball centered.
Now with the fairings and pants installed the ball is to the right about 3
ball widths and requires quite a lot of right rudder pressure to keep the
ball centered.. I removed the wheelpants last night and flew it like that
with no improvement, so I guess I have the gearleg fairings creating
drag.Now my question is would it be the port (left) fairing creating the
drag and the right one would be OK. or could they both be out. My theory is
that they are mini airfoils and both could be creating pressure and trying
to turn the ship around the center point. They look to be in line if you
just eyeball them, and I was very careful (I thought) in aligning them with
the airflow when installed, but the best laid plans and all that. I sure
don't want to make another set of intersection fairings.Anyone have this
problem? any suggested fixes?
Thanks
Chris F
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Message 2
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| Subject: | Re: Gearleg fairings? |
3 ball widths is beyond reasonable in my book. Remember, this equates
to drag whether you trim it with rudder trim tab or not. I would
consider all that gas you will waste over the life of the airplane and
really try to determine the cause. I had a similar yaw from the
fairings but mine was half a ball so I added a trim tab.
Good luck,
Jim Stone
HRII 95 hrs
----- Original Message -----
From: Im7shannon@aol.com
To: rocket-list@matronics.com
Sent: Sunday, May 11, 2008 2:35 PM
Subject: Re: Rocket-List: Gearleg fairings?
If it is not making it slower, it would be easier to install a trim
tab on the rudder than make new intersect fairings.
I guess I am just saying that because I am painting mine right now and
I don't want to do any of this over after weeks of sanding!
Kevin Shannon
HR II
Hey Fellas
I've been flying my Harmon Rocket for a grand total of 5
hours now
and all was going well until I put on the gearleg fairings and
wheelpants.
When I first flew it without the fibreglass bits she would pull to
the left
ever so slightly at full throttle and require very light right
rudder to
keep the ball centered.
Now with the fairings and pants installed the ball is to the right
about 3
ball widths and requires quite a lot of right rudder pressure to
keep the
ball centered.. I removed the wheelpants last night and flew it
like that
with no improvement, so I guess I have the gearleg fairings creating
drag.Now my question is would it be the port (left) fairing creating
the
drag and the right one would be OK. or could they both be out. My
theory is
that they are mini airfoils and both could be creating pressure and
trying
to turn the ship around the center point. They look to be in line if
you
just eyeball them, and I was very careful (I thought) in aligning
them with
the airflow when installed, but the best laid plans and all that. I
sure
don't want to make another set of intersection fairings.Anyone have
this
problem? any suggested fixes?
Thanks
Chris F
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favorites at AOL Food.
Message 3
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| Subject: | Gearleg fairings? |
I'd say a three-balls width points to a serious rigging problem. Consider
the amount of surface your rudder has to protrude into the airstream to
produce that kind of yaw and you would appreciate the drag. If you add to
that equation the arm of the rudder to the COG compared to the (much
shorter) arm of the gear legs to the COG, it would illuminate the
seriousness of the problem. I'd be surprised if it is the fairings but your
account of the problem suggests that it is. Did anything else happen to the
control surfaces since the installation?
_____
From: owner-rocket-list-server@matronics.com
[mailto:owner-rocket-list-server@matronics.com] On Behalf Of Jim Stone
Sent: Sunday, May 11, 2008 2:09 PM
Subject: Re: Rocket-List: Gearleg fairings?
3 ball widths is beyond reasonable in my book. Remember, this equates to
drag whether you trim it with rudder trim tab or not. I would consider all
that gas you will waste over the life of the airplane and really try to
determine the cause. I had a similar yaw from the fairings but mine was
half a ball so I added a trim tab.
Good luck,
Jim Stone
HRII 95 hrs
----- Original Message -----
From: Im7shannon@aol.com
Sent: Sunday, May 11, 2008 2:35 PM
Subject: Re: Rocket-List: Gearleg fairings?
If it is not making it slower, it would be easier to install a trim tab on
the rudder than make new intersect fairings.
I guess I am just saying that because I am painting mine right now and I
don't want to do any of this over after weeks of sanding!
Kevin Shannon
HR II
Hey Fellas
I've been flying my Harmon Rocket for a grand total of 5 hours now
and all was going well until I put on the gearleg fairings and wheelpants.
When I first flew it without the fibreglass bits she would pull to the left
ever so slightly at full throttle and require very light right rudder to
keep the ball centered.
Now with the fairings and pants installed the ball is to the right about 3
ball widths and requires quite a lot of right rudder pressure to keep the
ball centered.. I removed the wheelpants last night and flew it like that
with no improvement, so I guess I have the gearleg fairings creating
drag.Now my question is would it be the port (left) fairing creating the
drag and the right one would be OK. or could they both be out. My theory is
that they are mini airfoils and both could be creating pressure and trying
to turn the ship around the center point. They look to be in line if you
just eyeball them, and I was very careful (I thought) in aligning them with
the airflow when installed, but the best laid plans and all that. I sure
don't want to make another set of intersection fairings.Anyone have this
problem? any suggested fixes?
Thanks
Chris F
_____
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