Need help cowl attach hinge

Discussion for Sonex builders on specific plans page experience. These posts are limited to technical suggestions such as assembly order, challenges, or techniques related to specific plans pages.

Need help cowl attach hinge

Postby Sonex1542 » Mon Aug 11, 2014 7:30 pm

I'm no sure if I mounted the hung correctly on the side panel. Should the hinge curl in like I have. Or should it curl outward. Pics are of the right panel laying flat on the outside facing down.
http://imgur.com/Zq8186X

Also how will the retaining pin slide in, from the bottom?

Thanks
SNX-794. Formerly SNX-1542
Sonex1542
 
Posts: 53
Joined: Wed Sep 21, 2011 12:09 am
Location: Reno, NV

Re: Need help cowl attach hinge

Postby tonyr » Mon Aug 11, 2014 8:54 pm

They are going the right way
The cowl is about 1/8" thick and butts up to the side skin and angle, it hides the hinge loops when the cowl is fitted..
The pin is inserted from the bottom via a small cutout in the cowl.
Have a look at pics Rizz posted in Cowling Problem topic.
http://www.sonexbuilders.org/viewtopic.php?f=21&t=1201&start=10&sid=7d6e802677b386d7767c444e631f92aa
Sonex #813
First Flight... 4 Oct 14
298 hours having fun!
http://sonexaus.wikispaces.com/Tony+%28Richo%29+Richardson+Sonex+813
User avatar
tonyr
 
Posts: 200
Joined: Thu Jun 27, 2013 12:50 am

Re: Need help cowl attach hinge

Postby gammaxy » Mon Aug 11, 2014 8:57 pm

Look's correct to me, here's mine:

Image

The pins are inserted from the bottom near the landing gear legs.
Chris Madsen
Aerovee Sonex N256CM
Flying since September 2014
Build log: http://chrismadsen.org
gammaxy
 
Posts: 602
Joined: Wed Sep 04, 2013 9:31 am

Re: Need help cowl attach hinge

Postby Sonex1542 » Mon Aug 11, 2014 11:04 pm

Thank you guys. I did search for an image on a build and could find it quick enough to settle my own self questioning once again, did I screw up! Onward and upward. If I'm not making scrap, I'm not making progress...LOL
SNX-794. Formerly SNX-1542
Sonex1542
 
Posts: 53
Joined: Wed Sep 21, 2011 12:09 am
Location: Reno, NV

Re: Need help cowl attach hinge

Postby Bryan Cotton » Mon Aug 11, 2014 11:44 pm

We make it nice because we make it twice.
Bryan Cotton
Poplar Grove, IL C77
Waiex 191 N191YX
Taildragger, Aerovee, acro ailerons
dual sticks with sport trainer controls
Prebuilt spars and machined angle kit
Year 2 flying and approaching 200 hours December 23
User avatar
Bryan Cotton
 
Posts: 5501
Joined: Mon Jul 01, 2013 9:54 pm
Location: C77

Re: Need help cowl attach hinge

Postby rizzz » Tue Aug 12, 2014 12:17 am

Can you elaborate on what it is you screwed up?
What I can see in the picture looks fine to me, the hinge has to "curl" (as you say) inwards, not outwards, just like it is in your picture.

I've been searching through my kit log to see if some posts contain pictures of my installation, here's the best I could find, you can see the position of the hinges in this posts:
http://www.mykitlog.com/users/display_l ... 117&row=38
Michael
Sonex #145 from scratch (mostly)
Taildragger, 2.4L VW engine, AeroInjector, Prince 54x48 P-Tip
VH-MND, CofA issued 2nd of November 2015
First flight 7th of November 2015
Phase I Completed, 11th of February 2016
http://www.mykitlog.com/rizzz/
rizzz
 
Posts: 869
Joined: Tue Jun 21, 2011 2:07 am
Location: Wollongong, NSW, Australia

Re: Need help cowl attach hinge

Postby Sonex1542 » Tue Aug 12, 2014 3:14 am

Apparently I didn't make a mistake here. I looked at the hinge and saw there was no way to insert the pin from the top. I've remade nearly the whole aft fuse in pieces three times, and countless pieces of angle. Aft fuse was a mis measure, off an inch. I've seen some parts that people make, and even knowing the sonex is over engineered... The crash due to the tail falling off because of bad riveting... It drives me to make sure I do a great job.

The hinge just looked wrong, even looking at the print I needed to double check on this board. Don't want to redo, better to ask before riveting, lots of hard work. Scratch build here.
SNX-794. Formerly SNX-1542
Sonex1542
 
Posts: 53
Joined: Wed Sep 21, 2011 12:09 am
Location: Reno, NV

Re: Need help cowl attach hinge

Postby daleandee » Tue Aug 12, 2014 6:30 am

Bryan Cotton wrote:We make it nice because we make it twice.


Reminds me of Tony Spicer in his video "Right Seat with Tony Spicer" making the statement that he probably built three and threw two in the dumpster. As sad as it is ... it is refreshing to know I'm not the only one that had to do a few things over.

Dale
N319WF
User avatar
daleandee
 
Posts: 877
Joined: Fri Feb 01, 2013 6:14 pm

Re: Need help cowl attach hinge

Postby steveald » Tue Aug 12, 2014 2:48 pm

Sonex1542 wrote:The crash due to the tail falling off because of bad riveting...


Are you referring to the accident of Oct 22, 2011 involving a "Berger Waiex, N75654" near Washington, Georgia?
If so, the NTSB Accident ID is ERA12FA018, and there is a complete accident report available for download.
Included in the report is the following:

"The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The in-flight failure of the aircraft’s Y-tail attachment structure during maneuvering flight due to overload. Contributing to the accident was, the kit manufacturer’s use of 14 CFR Part 23, Appendix A design guidelines intended for a conventional tail airplane without a V- (or Y-) tail."

Looking at the photos included with the report, I can see how someone might form the opinion that the accident was the result of poor craftsmanship, but that would just be someone's opinion, and not the findings of the NTSB. Everyone is entitled to their own opinion, but I believe that opinion should be made based on the complete report and not on parts of it posted by myself or others on the internet.
Steve Aldridge
Sonex ST #1560
CYPK, BC Canada
steveald
 
Posts: 25
Joined: Sun Oct 06, 2013 2:33 pm


Return to Sonex Plans

Who is online

Users browsing this forum: No registered users and 13 guests