 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
Rowland_Carson
Joined: 04 Jul 2008
Posts: 155
Location: Cheltenham, England
|
 Posted: Sun Oct 05, 2008 7:39 am Post subject: when to attach spar strap |
 |
|
My wings are in the garage, pinned to the cockpit module with the
seatback bushes happily curing as in manual chapter 14. Looking some
way ahead to chapter 27, I note the need to add a retaining strap to
the port spar which has to be laid up around the starboard spar.
I can't see why I shouldn't do this layup now, while I have
everything conveniently to hand, but maybe there is something I have
overlooked. Can anyone think of a good reason to postpone this layup
until later?
regards
Rowland
--
| Rowland Carson LAA #16532 http://home.clara.net/rowil/aviation/
| 1120 hours building Europa #435 G-ROWI e-mail <rowil(at)clara.net>
| | - The Matronics Europa-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?Europa-List |
|
|
|
| Back to top |
|
 |
patkinson
Joined: 26 Jun 2007
Posts: 15
|
|
| Back to top |
|
|
fklein(at)orcasonline.com
Guest
|
| Posted: Sun Oct 05, 2008 4:34 pm Post subject: when to attach spar strap |
|
|
On Sunday, Oct 5, 2008, at 08:16 US/Pacific, Rowland & Wilma Carson
wrote:
| Quote: | My wings are in the garage, pinned to the cockpit module with the
seatback bushes happily curing as in manual chapter 14. Looking some
way ahead to chapter 27, I note the need to add a retaining strap to
the port spar which has to be laid up around the starboard spar.
I can't see why I shouldn't do this layup now, while I have everything
conveniently to hand, but maybe there is something I have overlooked.
Can anyone think of a good reason to postpone this layup until later?
|
Rowland,
Having ample working room and proper alignment are the important
considerations...suit yourself.
As I recall I made the spar strap after I'd bonded in the CM. I had
both wings in supports vertically w/ leading edge down with both spar
pins installed (I actually used temporary bolts)...thus the two spars
were lapped, and there was nothing in the way while fitting the little
cardboard ramps, bond breaks, and when wrapping the layups.
Fred
A194
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
| | - The Matronics Europa-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?Europa-List |
|
|
|
| Back to top |
|
|
budyerly(at)msn.com
Guest
|
| Posted: Tue Oct 07, 2008 11:08 am Post subject: when to attach spar strap |
|
|
<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Rowland and others,
The exact time to do the spar strap is up to you. I do it when convenient after rig of the sockets. Be sure to set each wing at the same incidence angle prior to glassing. I set the cardboard as depicted and I ensure that the release tape has two layers on the spar so the rig/de-rig gets just a little more play. Note the spacing between the starboard root spar and the socket or the between spar spacing when rigged to the fuselage. In the shop here, I use a spare socket cup to set the spacing, but a thin washer will do. That spacing needs to be duplicated so the spar strap is not to narrow. I set up the wings top side up and jig them in place. Once I have the glass on, I put peel ply around it and then tape it up to hold the glass from sagging. Once cured, it pulls apart easily. Doing it this way really makes the alignment through the spar strap a breeze later on. Remember, the spar strap needs to be snug, not tight. As far as when to do it, I like the spar strap for self rigging as it is a built in alignment device for me. Once I have the wings rigged, I put on the spar strap. Personally, it is a must for tail draggers.
Note: Depending on your clearances, once I found that the aileron cross link bolts scraped on the strap during rig. I changed out the bolt to a 525 screw for clearance.
Enjoy your building.
Bud Yerly
Custom Flight Creations
(813) 653-4989
[quote] ---
| | - The Matronics Europa-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?Europa-List |
|
|
|
| Back to top |
|
|
Rowland_Carson
Joined: 04 Jul 2008
Posts: 155
Location: Cheltenham, England
|
| Posted: Sun Oct 12, 2008 2:42 pm Post subject: when to attach spar strap |
|
|
At 2008-10-07 15:07 -0400 ALAN YERLY wrote:
| Quote: | The exact time to do the spar strap is up to you. I do it when
convenient after rig of the sockets. Be sure to set each wing at
the same incidence angle prior to glassing
|
Bud - thanks for that advice. Sorry for delay in responding. I'm
running into supply delays with adaptors for aluminium fuel lines,
and with the in-tank fuel level sensors, so I'm looking for something
else to do while waiting for deliveries.
The closeness of fit of the pip-pin (noticeably tighter than the
cap-screw with the allen key welded into it) in the spar bushes
suggests to me that the spars will not move much relative to each
other once it is inserted, but I will take care to check the relative
wing incidences before doing the spar strap glass work.
regards
Rowland
--
| Rowland Carson LAA #16532 http://home.clara.net/rowil/aviation/
| 1140 hours building Europa #435 G-ROWI e-mail <rowil(at)clara.net>
| | - The Matronics Europa-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?Europa-List |
|
|
|
| Back to top |
|
|
Rowland_Carson
Joined: 04 Jul 2008
Posts: 155
Location: Cheltenham, England
|
| Posted: Sat Oct 25, 2008 12:00 am Post subject: when to attach spar strap |
|
|
At 2008-10-07 15:07 -0400 ALAN YERLY wrote:
| Quote: | The exact time to do the spar strap is up to you
|
I've just done the spar strap layup, but had to repeat it. Why?
Because my paper manual calls for the strap to be 250mm x 90mm. When
I draped that on, it barely went around the back of the port spar and
the short flaps wouldn't stay in place at all without peel-ply
wrapped around. After I'd left it to cure, I checked the later PDF
manual on disc, and found it called for 350m x 90mm! So I rushed back
to the garage and pulled off the peel-ply & strap layup and quickly
did another to the larger measurements. Fortunately the bracket layup
wasn't disturbed too much by the ripping apart, and it was still
tacky when I draped on the strap for the second time.
Why didn't the factory make more of an announcement about such an
important error in the manual?
Has anyone else made a spar strap to the 250mm dimension & not
realised it is wrong?
regards
Rowland
--
| Wilma & Rowland Carson http://home.clara.net/rowil/
| <rowil(at)clara.net> ... that's Rowland with a 'w' ...
| | - The Matronics Europa-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?Europa-List |
|
|
|
| Back to top |
|
|
ptag.dev(at)tiscali.co.uk
Guest
|
| Posted: Sat Oct 25, 2008 1:20 am Post subject: when to attach spar strap |
|
|
Hi! Rowland
Mine was 250mm excepting I used my usual "poetic license" which would
have allowed adequate wrap round with the peel ply. However too much
between the port spa and the seat back bulkhead may result in difficulty
entering the port spa tip into it's receptacle socket on the starboard
side. After all if properly prepared and adequately bonded to the top
and bottom dimensions of the port spa then the strength of the wrap
round may well be a side issue anyway. The likely forces would be
parallel to the lay up and not in shear thereby making the wrap round
irrelevant other than for psychological satisfaction !
As to why you had problems with the manual I can't say but of course
adding all this "poetry" up makes for a heavy build ! .....But for me
it's not so much the weight but the strength that is more important
overall!
REGARDS
Bob Harrison G-PTAG
--
| | - The Matronics Europa-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?Europa-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
