Today's Message Index:
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1. 07:39 PM - Re: 601xl engine out glide ratio (hallert)
2. 08:57 PM - Re: Re: 601xl engine out glide ratio (Paul Mulwitz)
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| Subject: | Re: 601xl engine out glide ratio |
Paul and Mark,
Thanks for your inputs. I too have insufficient up trim when flying by
myself but with a passenger and less fuel it has just enough. I also had to
"trim" the rudder by adjusting the cables to center the ball in cruise. Have
not noticed the yaw instability you mention Paul. Seems much better than
an Allegro which I flew 6 years ago that seemed totally unstable in yaw.
Ted
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=353970#353970
Message 2
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| Subject: | Re: 601xl engine out glide ratio |
Hi Ted,
Rather than unstable, I would call the yaw behavior of the XL astable.
It will stay where you put it, but it won't find the best position in
yaw, i.e. it won't straighten itself out. If you kick the ruder the yaw
position will change and stay in the new position. If it were unstable
it wouldn't stay in any position but would constantly wander around.
I think this also explains your comment about slips not doing any good
to adjust landing approaches. Moving the tail from about 2 feet left of
center to the same amount right of center doesn't really change the
cross-section presented to the relative wind. There just isn't anything
significant on the plane that is lined up with the vertical axis while
moving forward. It is only when the tail displacement exceeds the
widest part of the fuselage (the shoulder area for passenger and pilot)
that the cross section changes.
I have been really miserable over this "Feature" since I discovered it a
week or two ago. At first I wanted to add some sort of vertical fin to
fix the problem but after an attempt to do this I decided I just don't
have the engineering skill needed for a change this big. Today I added
a bump on the top/front of the engine cowl in the correct position to
help line up the nose with the runway on landing. I haven't yet tried
out the new feature. The rains have started here in the Pacific NW rain
forest and I have no clue when there will be sufficient flying weather
for the test.
Paul
XL in flight test.
On 10/3/2011 7:36 PM, hallert wrote:
> --> Zenith601-List message posted by: "hallert"<hallert@verizon.net>
>
> Paul and Mark,
> Thanks for your inputs. I too have insufficient up trim when flying by
> myself but with a passenger and less fuel it has just enough. I also had to
> "trim" the rudder by adjusting the cables to center the ball in cruise. Have
> not noticed the yaw instability you mention Paul. Seems much better than
> an Allegro which I flew 6 years ago that seemed totally unstable in yaw.
>
> Ted
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=353970#353970
>
>
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