Today's Message Index:
----------------------
1. 11:40 AM - Re: Flight test report - N773PM (Sabrina)
2. 12:05 PM - Re: Re: Flight test report - N773PM (Paul Mulwitz)
3. 02:55 PM - Re: Flight test report - N773PM (hallert)
4. 03:21 PM - Re: Re: Flight test report - N773PM (Paul Mulwitz)
5. 08:53 PM - Prop Extension for sale (GLJSOJ1)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Flight test report - N773PM |
Dear Paul,
If I were to hazard a guess, your Yaw stability issue is likely due to improperly
tensioned rudder cables, slightly misaligned nose gear bearings and aft CG
loading. Nothing a little adjustment, lubrication and full fuel load won't cure.
Dear Ron,
Congrats!
Sabrina
P.S. CERN has welcomed me with open arms, not to mention my best birthday party in a decade. I have accomplished a lot in just one week. My sophomore year at MIT finished strong: http://sabrinaaerospace.com/index.php?news&nid=42
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374612#374612
Attachments:
http://forums.matronics.com//files/istanbul_416.jpg
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Flight test report - N773PM |
Hi Sabrina,
Thanks for the advice. Unfortunately, I've already tried all of that
stuff. I did need to extend the nose gear column by 1/8 inch but that
had little impact on the yaw stability. I noticed the column on another
XL at my home field had about 4 inches extending above the firewall
shelf while mine didn't get above it at all.
After taking a close look at the whole airplane I came to the conclusion
that this design has no inherent yaw stability. View of the fuselage
from the top presents a diamond shape that has no vertical surface that
runs parallel to straight flight. The closest it gets is a 22 degree
included angle presented by the tail end of the fuselage. The full
flying rudder depends on the V-blocks in the nose gear column assembly
to make it straight when there is no rudder pressure applied in flight.
(I don't have wheel pants that might give a little stability.)
I did learn on early flights that the V-blocks made my plane pull a
little to the left in flight. I fixed that by adjusting the rudder
cables so the rudder is straight. I have always had my rudder cables
tensioned according to CH's requirements.
This whole line of thought started when another list member pointed out
that forward slips do not do anything to cause the plane to have a
steeper approach path. I then learned from my own plane that if I
kicked the nose to one side or the other it didn't return to center as
required by F2245. At least in the case of my plane it clearly doesn't
meet the LSA spec for stability. I wonder what other owners find when
trying this test.
Best regards,
Paul
On 6/3/2012 11:40 AM, Sabrina wrote:
> --> Zenith601-List message posted by: "Sabrina"<chicago2paris@msn.com>
>
> Dear Paul,
>
> If I were to hazard a guess, your Yaw stability issue is likely due to improperly
tensioned rudder cables, slightly misaligned nose gear bearings and aft CG
loading. Nothing a little adjustment, lubrication and full fuel load won't
cure.
>
> Dear Ron,
>
> Congrats!
>
> Sabrina
>
> P.S. CERN has welcomed me with open arms, not to mention my best birthday party in a decade. I have accomplished a lot in just one week. My sophomore year at MIT finished strong: http://sabrinaaerospace.com/index.php?news&nid=42
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=374612#374612
>
>
> Attachments:
>
> http://forums.matronics.com//files/istanbul_416.jpg
>
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Flight test report - N773PM |
Paul,
On the yaw issue my plane is different in one regard from anything I have flown
before - it has a stiff nose gear bearing that tends to stay where I push it
with noticeable friction. At first I fund this somewhat annoying but now I consider
it an advantage as sort of a "poor man's rudder trim". On climb out I push
enough right rudder to center the ball and can then remove pedal pressure while
remaining rudder trimmed. After climb out a little nudge on the left pedal
corrects rudder trim for cruise.
Ted
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374624#374624
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Flight test report - N773PM |
Hi Ted,
That sounds like mine too.
You are calling that stiff rudder, I am calling it lack of yaw
stability. Both are true.
Paul
On 6/3/2012 2:53 PM, hallert wrote:
> --> Zenith601-List message posted by: "hallert"<hallert@verizon.net>
>
> Paul,
> On the yaw issue my plane is different in one regard from anything I have flown
before - it has a stiff nose gear bearing that tends to stay where I push it
with noticeable friction. At first I fund this somewhat annoying but now I consider
it an advantage as sort of a "poor man's rudder trim". On climb out I
push enough right rudder to center the ball and can then remove pedal pressure
while remaining rudder trimmed. After climb out a little nudge on the left pedal
corrects rudder trim for cruise.
>
> Ted
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=374624#374624
>
>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Prop Extension for sale |
I am changing out the nose of my XL and am selling my prop extension.
Follow the link to Barnstormers. Thanks.
http://www.barnstormefrs.com/cat.php?mode=search
--------
601XL N676L FLYING PHASE I
CHESAPEAKE VA
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374640#374640
Attachments:
http://forums.matronics.com//files/2012_03_17_074525_174.jpg
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|