 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
lenabeto(at)uol.com.br
Guest
|
 Posted: Sat May 10, 2008 8:36 am Post subject: Zenith Builders Analysis Group -- |
 |
|
Hi Andy,
We had this problem (aileron flutter), but fortunately, my pilot could land safe, he was alone.
Sorry about my English.
Roberto Brito
Brazil
Zodiac XL 601 w/ 190hrs
Jabiru 3300
Enigma
[quote][b]
| | - The Matronics Zenith-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?Zenith-List |
|
|
|
| Back to top |
|
 |
Yak52(at)aol.com
Guest
|
| Posted: Sun May 11, 2008 6:19 pm Post subject: Zenith Builders Analysis Group -- |
|
|
What if he says it's a sound design? Are you going to jump back into
>building with both feet, finally content that the 601xl is safe,
Content that it safe? I think that would fly in the face of the NTSB final
report on the Oakdale accident.
AS it appears that not even a clean bill of health from this outside expert will convince you the airplane as designed is "safe", why even bother to proceed.
Assume the expert says the design is "unsafe", what will you do to recover your "treasure"? Will you sell the kit to someone else to build? Will you tell this purchaser that you have hired this expert and the design is "unsafe" ? Have any of you considered the effect that all of this brainstorming will have on the future of your aircraft. Writing "do not archive" does not erase this brainstorming from the internet. Are you going to tell any future passengers or purchasers of your aircraft that you have, in writing, questioned the "safety" of the aircraft design and/or made modifications to the structure of the aircraft without structural analysis by a design professional? How will you report these changes to your insurance company as I'm sure that you are concerned enough to take out liability insurance to protect your passengers and/or their estates when the "unsafe" craft inevitably crashes. Will you placard your aircraft with your concerns and changes. Will you inform your passengers about your unauthorized acrobatic maneuvers(remember those youtube videos)? Have you informed the expert that you will be sending the report to the NTSB. Have your group members realized their potential liability for the publication, and in some states the failure to publish, of their newfound knowledge about the "unsafe" design(I'll assume the expert already knows of his liability exposure)?
Assume the expert, although he is only reviewing the plans, says the design is "safe" or even substantially complies with reasonable engineering standards. Is your fall back plan to "rely" on the NTSB reports which you have all indicated previously as being useless, incomplete or incompetent. Once again, and without a cause for the accident being delineated, you allege design errors and not construction mistakes, materials substitutions, aerobatics or any other reasons for the structural failures. This is circular logic, at best, and not precise engineering study of a hopefully non-existent situation.
So, proceed on with your study, but realize the consequences of your actions go far beyond your tapping computer keys in the darkness.
Wondering what's for Dinner Tonight? Get new twists on family favorites at AOL Food.
[quote][b]
| | - The Matronics Zenith-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?Zenith-List |
|
|
|
| Back to top |
|
|
Martin Pohl
Joined: 30 Jan 2006
Posts: 118
Location: CH-8645 Jona SG, Switzerland
|
| Posted: Mon May 12, 2008 2:44 am Post subject: Re: Zenith Builders Analysis Group -- |
|
|
I found a good report from DLR (German Research Institute for Aviation and Space Flight) about aileron flutter (see abstract below). PhD Mr. Kiessling sent me a copy of this report.
http://elib.dlr.de/39473/
Unfortunately the electronic copy is in German only. I have a hardcopy in English. Nevertheless I will contact Mr. Kiessling if he can provide an english electronic copy.
The idea is to check and adjust aileron/elevator/rudder balancing with simple means.
If somebody is interested, has a good amount of time, has some engineering background and is up for doing such tests on his/hers Zodiac, feel free to contact me!
The tests have to be done on already painted control surfaces BEFORE they are attached to the wing and AFTER they are attached to the wing and connected to the entire control system (i.e. wings then need to be installed to the fuselage). That would be possible e.g. with a nearly finished XL when wings can be installed, but ailerons only attached with clecoes.
Cheers Martin
| | - The Matronics Zenith-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?Zenith-List |
|
_________________
Martin Pohl
Zodiac XL QBK
8645 Jona, Switzerland
http://www.pohltec.ch/ZodiacXL/Main.html |
|
| 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
