HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Nov 11, 2012, 09:06 PM
Registered User
United States, OH, Springfield
Joined Apr 2012
9 Posts
Discussion
Composite Failures / Damage

I am working on a study of model aircraft structural failures.
Photos of composite type construction failures would be greatly appreciated along with explanation of how damage was induced.

Thank you,
JeffinSpringfeild
JeffinSpringOH is offline Find More Posts by JeffinSpringOH
Reply With Quote
Sign up now
to remove ads between posts
Old Nov 11, 2012, 09:15 PM
Red Merle ALES
Curtis Suter's Avatar
United States, Mt, Helena
Joined Apr 2002
5,486 Posts
I know this is not what you mean but couldn't resist.

http://www.rcgroups.com/forums/showt...7#post21458994

Curtis
Curtis Suter is online now Find More Posts by Curtis Suter
RCG Plus Member
Reply With Quote
Old Nov 13, 2012, 08:56 AM
Registered User
prodjx's Avatar
Joined Jan 2007
4,715 Posts
You ought to look up the photo of the fin attach area of the airbus that crashed into a N.Y. neighborhood right after 9/11. I know it's not a model but it show's you what can happen. I used to work at Grumman's Advanced Composites Facility in Milledgeville Ga. for many year's. For the most part composites of various type's fail differently. Carbon explode's, kevlar fail's the resin but remain's together and fibre-glas can go either way depending on the severity of the impact or load. One of the most facinating piece's of equipment I've ever been close to at Grumman was our ultrasonic water fall inspection dept. We used it at that time to inspect the spoiler's we were making for Boeing. Pretty neat. In real time it could show delamination's and print out a hard page of it. This sure beat using a hammer so to speak. It was way faster too.
prodjx is offline Find More Posts by prodjx
RCG Plus Member
Reply With Quote
Old Nov 16, 2012, 07:42 PM
Whisper Model Aircraft
heliwill10's Avatar
Greensburg, PA
Joined Feb 2008
558 Posts
I just built a batch of stabs with varying layups. I ended up failing all of them until I found the strength I was looking for.....

They went into the garbage a couple weeks ago

What kinda info are hoping to retrieve from pictures?
heliwill10 is offline Find More Posts by heliwill10
Reply With Quote
Old Nov 16, 2012, 08:42 PM
Registered User
prodjx's Avatar
Joined Jan 2007
4,715 Posts
The photo's were just to show what can happen to an airliner. The fin sheered off at all the attach point's. I was with Daryl Perkin's doing stab testing on the Icon 2 and he was proving the strength of the new stab's after some customer's failed their stab's. And I think the only difference in the stab's were the thickness. See if you can find the book Composite Construction for Homebuilt Aircraft by Jack Lambie, 2nd edition. It's got some good info.
prodjx is offline Find More Posts by prodjx
RCG Plus Member
Reply With Quote
Old Nov 21, 2012, 07:29 AM
Registered User
prodjx's Avatar
Joined Jan 2007
4,715 Posts
BTW it just so happen's that there was an article in USAToday about the airliner crash I mentioned in my first post. It's amazing that the FAA has just gotten around to making recomendation's to keep this from happening again. Have you brought up your request over on the composites forum?
prodjx is offline Find More Posts by prodjx
RCG Plus Member
Reply With Quote
Old Nov 21, 2012, 02:26 PM
Master of the Wind
G Norsworthy's Avatar
United States, CA, San Jose
Joined Sep 2008
1,161 Posts
Start at post 184

http://www.rcgroups.com/forums/showt...256550&page=13
G Norsworthy is offline Find More Posts by G Norsworthy
Reply With Quote
Old Nov 21, 2012, 02:28 PM
Master of the Wind
G Norsworthy's Avatar
United States, CA, San Jose
Joined Sep 2008
1,161 Posts
http://www.rcgroups.com/forums/showt...hlight=caracho
G Norsworthy is offline Find More Posts by G Norsworthy
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion how much wing damage is too much damage ?? :-) khooke Micro Ready-to-Fly 15 Jun 13, 2012 11:13 AM
Discussion Obama; Racking Up Failure After Failure After Failure.... Highflight Life, The Universe, and Politics 86 Aug 23, 2011 01:28 PM
Li-poly failures without physical damage ifrichard Batteries and Chargers 4 Oct 27, 2003 09:09 AM