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  #1  
Old 08-03-2022, 05:28 PM
Thermos's Avatar
Thermos Thermos is offline
 
Join Date: Jan 2005
Location: KASH
Posts: 640
Default Gust locks...what worked and what didn't?

I understand we're not supposed to discuss EAA policy with respect to the Oshkosh storm, so let's focus on effective (or ineffective) gust locks.

If you had control surface damage (and I'm sorry if you did), what gust locks were you using? How did they fail?

Same question for those of you who escaped. What were you using?

Dave
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  #2  
Old 08-03-2022, 06:18 PM
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Ironflight Ironflight is offline
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Join Date: Jan 2005
Location: Dayton, NV
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Default

All our RV’s (two of which were at the show this year) are taildraggers, and we let the tailwheel locking pin hold the rudder. We generally use seat belts for the elevator/aileron. In twenty oshkosh’s and as many years flying them all over the country, those measures have always worked for us.

Of course YMMV!

Paul
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  #3  
Old 08-03-2022, 06:43 PM
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edclee edclee is offline
 
Join Date: Aug 2008
Location: Lancaster, SC
Posts: 284
Default Gust Locks

I made some DIY gust locks for my RV9A and they held up just fine while an RV-9A parked in front of me at HBC got his rudder twisted and non airworthy. Pictures attached. I use 1" #10 screws dropped into the locator holes in the rudder stop on the fuse sides. It is rugged, light, easy to install. I use a pvc rod in the cockpit to hold the stick back and left so it cant move. All held up fine.
Ed
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  #4  
Old 08-03-2022, 06:52 PM
agent4573 agent4573 is offline
 
Join Date: Aug 2019
Location: Mountain view
Posts: 559
Default

We've got the flyboy accessory tail wheel arm with the extra tie down hole. Fully secured the tail wheel and used the "ultimate gust lock". Appears to have gotten away with no damage.
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  #5  
Old 08-03-2022, 07:06 PM
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RVbySDI RVbySDI is offline
 
Join Date: May 2005
Location: Tuttle, Oklahoma
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I have a 9A. I have used the AntiSplat gust lock for many years. Has always worked as advertised until Saturday, July 23rd. The gust lock did not break. It did pull back, as the wind blew the elevator, enough to pull the forks on the gust lock away from the rudder pedals. This resulted in the rudder being completely free to fling itself back and forth at will. Resulted in punctured skins, but more devastating, trailing edge rivets pulling out and buckling of the skin on the bottom of the rudder. It is difficult to see the buckling on my rudder in the pics below due to the red paint.
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So that is only part of the story. Just down the row about 4 airplanes was a 14A with very similar skin buckling damage in almost the same area of the rudder as my damage. He also was using the AntSplat gust lock. It did not come free or break. It held firmly as designed. However, he has substantial damage very much like mine.

Here are pictures of the damage on his rudder. Due to the yellow paint it is much easier to see the damage.
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So, two ‘A’ model airplanes using the same type of gust lock. One gust lock failed! One did not! Both experienced almost identical skin buckling in almost the same position on the rudder.

It does appear that the tail wheel airplanes have a couple of advantages over the nose wheel models. One, the rudder is tied to the linkage of the tail wheel. Two, the rudder is low to the ground where the nose wheel models’ rudders are up high in the air. Besides my 9A I know of several 14A models and at least one RV10 that had rudder damage. All of these models have pretty large rudders suspended pretty high up in the air.
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Last edited by RVbySDI : 08-03-2022 at 07:12 PM.
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  #6  
Old 08-03-2022, 07:16 PM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
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Default Question

How much tension was set on those two gust locks? I know that when I setup mine, there were at least three adjustment holes that would work. I can see if the gust lock was set to the minimum tension how it could jump off the pedals; not sure if the middle setting would but I am fairly certain that the maximum tension would not be able to come off the pedals. I guess anything is possible with the winds we had…
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  #7  
Old 08-03-2022, 07:21 PM
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sbalmos sbalmos is offline
 
Join Date: Oct 2011
Location: Liberty Twp, OH
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My lock(s) worked perfectly fine. I have two matching pins between the rudder horn and stops on either side of the fuse, bent out of 5/16" steel rod from Home(built) Depot. I know others have similar, with less-than-satisfactory results - probably because they only have one pin installed on one side? I will agree if I only have one pin in on one side of the rudder, there still is a tiny bit of play. On a decent day, one pin is enough to cover the typical stiff breezes. With winds like Saturday night's, it's probably enough to either eventually work the pin out or bend the rod, potentially allowing for rudder movement. But having both pins installed, the rudder has absolutely no play.
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  #8  
Old 08-03-2022, 07:23 PM
Kyle Boatright Kyle Boatright is offline
 
Join Date: Aug 2005
Location: Atlanta, GA
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I used the antisplat on the -10. I had it tight as a drum and it worked well.
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  #9  
Old 08-03-2022, 07:27 PM
868RM 868RM is offline
 
Join Date: Oct 2009
Location: lena, il.
Posts: 320
Default tie downs

RV-8a I was parked on the west side, right along the road between the tower and the war birds facing East. There were no other planes near me when the storm rolled thru. Was tied down with the Claw and Anti Splat folding rudder, aileron lock that goes between pedals and stick that is made of steel not aluminum.
The Hooker ratchet straps on the tie downs were still tight and the gust lock was just as installed in the morning. No damage at all.
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  #10  
Old 08-03-2022, 07:33 PM
rocketman1988 rocketman1988 is offline
 
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Location: Sunman, IN
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Default Yes

Quote:
Originally Posted by Kyle Boatright View Post
I used the antisplat on the -10. I had it tight as a drum and it worked well.
I was surprised at the tension that could be applied…
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