 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
Mark.Gray(at)takata.com
Guest
|
 Posted: Fri Apr 30, 2010 10:19 am Post subject: Nose down at higher speeds. |
 |
|
Both myself and a buddy who fly a Firestar and a Twinstar have the same issue, when we get to around 75 mph indicated the planes start to nose over and begin to get a strange shuffling feel as if the wings are alternately shuffling forward, kind of a tail wag maneuver. This continues to become more pronounced if we allow the speed to increase and it becomes necessary to apply substantial back pressure to stay level. I feel it is a shift of the AC due to the airfoil but if so how do the faster Kolbs avoid this?
Mark
The information in this email and attachments hereto may contain legally privileged, proprietary or confidential information that is intended for a particular recipient. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any disclosure, copying, distribution, retention or use of the contents of this e-mail information is prohibited and may be unlawful. When addressed to Takata customers or vendors, any information contained in this e-mail is subject to the terms and conditions in the governing contract, if applicable. If you have received this communication in error, please immediately notify us by return e-mail, permanently delete any electronic copies of this communication and destroy any paper copies.
Think Green - Please consider the environment before printing this email.
[quote][b]
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
 |
slyck(at)frontiernet.net
Guest
|
| Posted: Fri Apr 30, 2010 1:08 pm Post subject: Nose down at higher speeds. |
|
|
Glad we got led astray from the circle turning version of seafoam. Also good to see another observation of the sensationfelt when going over 75, in my case a MkIII. It is uncomfortable. It may have something to do with CG. Lots of owners
with higher HP planes seem to be doing just fine at higher speeds. I feel that subtle differences like full enclosure canopy
and fabric covered rears may be playing a part. In my case I have the open area behind the seats (gas tank area)
and, more importantly, a really wide windshield that is shoving my nose down at higher speeds.
I have drilled another set of front spar holes (set no. three) and may get around to trying them this year.
BB
MkIII, Suzuki
strip is freshly mowed, tractors moved out of the shed, just have to retrieve the bird.
On 30, Apr 2010, at 2:16 PM, Gray, Mark wrote:
| Quote: | Both myself and a buddy who fly a Firestar and a Twinstar have the same issue, when we get to around 75 mph indicated the planes start to nose over and begin to get a strange shuffling feel as if the wings are alternately shuffling forward, kind of a tail wag maneuver. This continues to become more pronounced if we allow the speed to increase and it becomes necessary to apply substantial back pressure to stay level. I feel it is a shift of the AC due to the airfoil but if so how do the faster Kolbs avoid this?
Mark
The information in this email and attachments hereto may contain legally privileged, proprietary or confidential information that is intended for a particular recipient. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any disclosure, copying, distribution, retention or use of the contents of this e-mail information is prohibited and may be unlawful. When addressed to Takata customers or vendors, any information contained in this e-mail is subject to the terms and conditions in the governing contract, if applicable. If you have received this communication in error, please immediately notify us by return e-mail, permanently delete any electronic copies of this communication and destroy any paper copies.
Think Green - Please consider the environment before printing this email.
| Quote: |
style="color: blue; text-decoration: underline; ">http://www.matronics.com/Navigator?Kolb-List
blue; text-decoration: underline; ">http://forums.matronics.com
style="color: blue; text-decoration: underline; ">http://www.matronics.com/contribution
|
|
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
|
Eugene Zimmerman
Joined: 10 Jan 2006
Posts: 392
|
| Posted: Fri Apr 30, 2010 6:26 pm Post subject: Re: Nose down at higher speeds. |
|
|
Mark,
To prevent, or stop the tail wag/wing shuffle keep both feet on the rudder pedals.
Full wind screed "shape" affects nose down moment at increased speed.
Narrower and round is better than wide and flat.
The goal is to have the wind deflect around to the sides of the wind screen and fuselage rather than up over the top of the wing.
I've tried both shapes, and while wider and flatter is more roomy, narrow and round is more efficient and makes the plane pitch neutral which is a much safer flight characteristics at higher speed.
attached is a photo with the narrow rounded wind screen which increased my top speed about 10 mph.
My other wind screen was the full width of the wing gap cover and approximately flat along the leading edge of the gap cover.
Gene
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
|
| Description: |
|
| Filesize: |
59.23 KB |
| Viewed: |
2400 Time(s) |
|
|
|
| Back to top |
|
|
gtaylor35918(at)roadrunne
Guest
|
| Posted: Fri Apr 30, 2010 8:07 pm Post subject: Nose down at higher speeds. |
|
|
Mark,
Are you sure your are not experiencing aileron flutter?
Greg
[quote] ---
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
